Water pollution is killing millions of Indians. Here's how technology and reliable data can change that

A boy searches for fish in the polluted sea backwaters near marina beach in the southern Indian city of Chennai July 3, 2013. REUTERS/Babu (INDIA - Tags: SOCIETY ENVIRONMENT) - GM1E9731O7D01

It's estimated that around 70% of surface water in India is unfit for consumption Image:  REUTERS/Babu

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Humans have wrestled with water quality for thousands of years, as far back as the 4th and 5th centuries BC when Hippocrates, the father of modern medicine, linked impure water to disease and invented one of the earliest water filters. Today, the challenge is sizeable, creating existential threats to biodiversity and multiple human communities, as well as threatening economic progress and sustainability of human lives.

As India grows and urbanizes, its water bodies are getting toxic. It's estimated that around 70% of surface water in India is unfit for consumption . Every day, almost 40 million litres of wastewater enters rivers and other water bodies with only a tiny fraction adequately treated. A recent World Bank report suggests that such a release of pollution upstream lowers economic growth in downstream areas, reducing GDP growth in these regions by up to a third. To make it worse, in middle-income countries like India where water pollution is a bigger problem, the impact increases to a loss of almost half of GDP growth. Another study estimates that being downstream of polluted stretches in India is associated with a 9% reduction in agricultural revenues and a 16% drop in downstream agricultural yields.

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The cost of environmental degradation in India is estimated to be INR 3.75 trillion ($80 billion) a year. The health costs relating to water pollution are alone estimated at about INR 470-610 billion ($6.7-8.7 billion per year) – most associated with diarrheal mortality and morbidity of children under five and other population morbidities. Apart from the economic cost, lack of water, sanitation and hygiene results in the loss of 400,000 lives per year in India . Globally, 1.5 million children under five die and 200 million days of work are lost each year as a result of water-related diseases.

To set up effective interventions to clean rivers, decision-makers must be provided with reliable, representative and comprehensive data collected at high frequency in a disaggregated manner. The traditional approach to water quality monitoring is slow, tedious, expensive and prone to human error; it only allows for the testing of a limited number of samples owing to a lack of infrastructure and resources. Data is often only available in tabular formats with little or no metadata to support it. As such, data quality and integrity are low.

Using automated, geotagged, time-stamped, real-time sensors to gather data in a non-stationary manner, researchers in our team at the Tata Centre for Development at UChicago have been able to pinpoint pollution hotspots in rivers and identify the spread of pollution locally. Such high-resolution mapping of river water quality over space and time is gaining traction as a tool to support regulatory compliance decision-making, as an early warning indicator for ecological degradation, and as a reliable system to assess the efficacy of sanitation interventions. Creating data visualizations to ease understanding and making data available through an open-access digital platform has built trust among all stakeholders.

Pictorial representation of a non-stationary, real-time sensor system with cloud based data storage and digital dissemination capabilities

Beyond collecting and representing data in easy formats, there is a possibility to use machine learning models on such high-resolution data to predict water quality. There are no real-time sensors available for certain crucial parameters estimating the organic content in the water, such as biochemical oxygen demand (BOD), and it can take up to five days to get results for these in a laboratory. These parameters can potentially be predicted in real-time from others whose values are available instantaneously. Once fully developed and validated, such machine learning models could predict values for intermediary values in time and space.

Applying Neural Network to easily available parameters in real-time to predict other water quality indicators

Furthermore, adding other layers of data, such as the rainfall pattern, local temperatures, industries situated nearby and agricultural land details, could enrich the statistical analysis of the dataset. The new, imaginary geopixel, as Professor Supratik Guha from the Pritzker School of Molecular Engineering calls it, has vertical layers of information for each GPS (global positioning system) location. Together they can provide a holistic picture of water quality in that location and changing trends.

case study on water pollution in india

In broad terms, machine learning can help policy-makers with estimation and prediction problems. Traditionally, water pollution measurement has always been about estimation – through sample collection and lab tests. With our technology, we are increasing the scope and frequency of such estimation enormously – but we are also going further. With our machine learning models, we are trying to build predictive models that would completely change the scenario of water pollution data. Moreover, our expanded estimation and prediction machine learning tools will not just deliver new data and methods but may allow us to focus on new questions and policy problems. At a macro level, we aim to go beyond this project and hope to bring a culture of machine learning into Indian Public Policy.

Under the theme, Innovating for India: Strengthening South Asia, Impacting the World , the World Economic Forum's India Economic Summit 2019 will convene key leaders from government, the private sector, academia and civil society on 3-4 October to accelerate the adoption of Fourth Industrial Revolution technologies and boost the region’s dynamism.

Hosted in collaboration with the Confederation of Indian Industry (CII), the aim of the Summit is to enhance global growth by promoting collaboration among South Asian countries and the ASEAN economic bloc.

The meeting will address strategic issues of regional significance under four thematic pillars:

• The New Geopolitical Reality – Geopolitical shifts and the complexity of our global system

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• The New Technological System – The Fourth Industrial Revolution, science, innovation and entrepreneurship

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Access to information has been an important part of the environmental debate since the beginning of the climate change movement. The notion that “information increases the effectiveness of participation” has been widely accepted in economics and other social science literature. While the availability of reliable data is the most important step towards efficient regulation, making the process transparent and disclosing data to the public brings many additional advantages. Such disclosure creates competition among industries on environmental performance. It can also lead to public pressure from civil society groups, as well as the general public, investors and peer industrial plants, and nudge polluters towards better behaviour.

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ICESMART - 2015 (Volume 3 - Issue 19)

River water pollution:a case study on tunga river at shimoga-karnataka.

case study on water pollution in india

  • Article Download / Views: 3,209
  • Total Downloads : 16
  • Authors : Dr. H. S. Govardhana Swamy
  • Paper ID : IJERTCONV3IS19035
  • Volume & Issue : ICESMART – 2015 (Volume 3 – Issue 19)
  • Published (First Online): 24-04-2018
  • ISSN (Online) : 2278-0181
  • Publisher Name : IJERT

Creative Commons License

Dr. H. S. Govardhana Swamy

Professor & Head, Department of Civil Engineering RajaRajeswari College of Engineering,

Bengaluru, India

Abstract Tunga River has been one of the most prominent and important river of Karnataka in Shimoga District. Unfortunately, certain stretches of River Tunga are much polluted. Various urban centers are located on the banks of Tunga River, draw fresh river water for various activities. In almost the entire wastewater generated by these centers is disposed off into the river. The objective of the monitoring studies undertaken for water body is to assess variation in water quality with time. Four sampling stations were selected along the river for sampling purpose from August 2013 to August 2014.Water samples were analyzed in terms of physico-chemical water quality parameters.

Keywords Thunga River, water quality, point pollution, Physico-chemical parameters

INTRODUCTION

In nature, water is the essential fluid from which all life begins. All living things need water to maintain their life too. In domesticity, it is very useful, such as for washing and cleaning. In industry, it is the common solvent for Paper and water, textile and electroplating. Besides, the generation of electricity also requires water. It has many uses. However, it can be easily polluted. Pollutants deteriorate the quality of the water and render it unfit for its intended uses [1]. The pollution of rivers and streams with chemical contaminants has become one of the most critical environmental problems of the century. It is estimated that each year 10 million people die from drinking contaminated water. Water is one of the most common and precious resources on the earth without there would be no life on earth [2]. Pollution is a serious problem as almost 70% of Indias surface water resources and a growing number of its groundwater reserves have been contaminated The quality of water is described by its physical, chemical and microbiological characteristics. Therefore a regular monitoring of river water quality not only prevents outbreak of diseases and checks water from further deterioration, but also provides a scope to assess the current investments for pollution prevention and control. In this study, seasonal variations of physico-chemical and bacteriological characteristics of water quality in Tunga river was assessed in Shimoga town in Karnataka.

MATERIALS AND METHODS

Shimoga is town, situated between the North and South branches of river Tunga. It is located on the Bangalore Honnavar highway.Though it is a town of medium population, the temples and historically significant monuments of this town attracts a large number of tourist people resulting in a very high floating population. Because of this reason the river Tunga along Shimoga town stretch is prone to anthropogenic activities such as bathing, washing and disposal of wastes. The ground level in the town slopes towards river so that most of the storm and sewerage drains discharge into river Tunga. There are two stream monitoring stations and 15 drains located in this town stretch

Monitoring Stations

Station – S1

Station S1 is located on the north side of the river, near the Shimoga Thirthahalli new bridge. It is an upstream station and near this station water is being drawn for supply to the town.

Station – S2

This station is about 300 m downstream of station S1.The station S2 is located on a drain that enters the river from the industrial town areas. The flow in the drain is mainly comprised of industrial waste.

Station – S3

The station S3 is an most affected station and is positioned near the Vinayaka temple(Ramanna shetty park). It is downstream of the sewage disposal point from the station S3. A bathing ghat exists near this Station.

Station S4 is located on the south side of the river, near the Shimoga Bhadravathi new bridge. Two number of sewage drains dispose city sewage water in to the river directly.

Data Preparation

The data sets of 4 water quality monitoring stations which comprised of 10 water quality parameters monitored monthly over 2 years (2013-2014) are used for this study. The data is obtained from the water Quality Monitoring work of Tunga River Basin in Shimoga District,

Karnataka State Although there are more water quality parameters in these stations, only 10 most important parameters are chosen because of their continuity in measurement through the 12 years. The 10 selected water quality parameters include Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Chlorides (Cl), Total Dissolved Solids (TDS), Conductivity, Temperature and pH.

Analysis of samples

The water samples were collected from each of the five selected stat ions according to the standard sampling methods (IS: 2488, 1966 APHA, 1998).Samples for estimating dissolved oxygen (DO) and biochemical oxy gen demand (BOD) were collected separately in BOD(glass) bottles. Water temperature was recorded on the spot using thermometers.

RESULT AND DISCUSSION

Temperature was found to be ranged between 14 0C (minimum) to 280C (maximum) with average value of 210+9.90C from all the sites. Impinging solar radiation and the atmospheric temperature brings interesting spatial and temporal changes in natural waters. The rise in temperature of water accelerates chemical reactions, reduces solubility of gases, amplifies taste and odour and elevates metabolic activity of organisms (Usharani et al., 2010).

pH of the aquatic system is an important indicator of the water quality and the extent pollution in the watershed areas. pH was recorded to be varying from 6.43 (minimum) to 9.13 (maximum) with an average value of 7.78+1.91 from all the sites (Jonnalagadda et al.,2001). It has been mentioned that the increasing pH appear to be associated with increasing use of alkaline detergents in residential areas and alkaline material from wastewater in industrial areas (Chang, H., 2008)

Conductivity is a good and rapid method to measure the total dissolved ions and is directly related to total solids. Higher the value of dissolved solids, greater the amount of ions in water (Bhatt.,1999). The range of Electrical conductivity from all the sites was recorded as 340.00

µmhos (minimum) to 734.00 µmhos (maximum) with an average value of 537.00+278.60 µmhos

The value of Dissolved Oxygen is remarkable in determining the water quality criteria of an aquatic system. In the system where the rates of respiration and organic decomposition are high, the DO values usually remain lower than those of the system, where the rate of photosynthesis is high (Mishra et al., 2009). During the study period DO was found to be ranging between 4.90 mg/l (minimum) to 8.50 mg/l (maximum) from all the sites with an average value of 6.70+2.55 mg/l.

Biochemical Oxygen Demand is a measure of the oxygen in the water that is required by the aerobic organisms. The biodegradation of organic materials exerts oxygen tension in the water and increases the biochemical oxygen demand (Abida, 2008).BOD has been a fair measure of cleanliness

of any water on the basis that values less than 1-2 mg/l are considered clean, 3 mg/l fairly clean, 5 mg/l doubtful and 10 mg/l definitely. During the study period BOD varied from 3.00 mg/l (minimum) to 8.00 mg/l (maximum) with an average value of 5.50+3.54 mg/l at all the sites.

Chemical Oxygen Deand is a measure of the oxidation of reduced chemicals in water. It is commonly used to indirectly measure the amount of organic compounds in water. The measure of COD determines the quantities of organic matter

found in water. This makes COD useful as an indicator of organic pollution in surface water (King et al., 2003).COD pointing to a deterioration of the water quality likely caused by the discharge of municipal waste water (Mamais et al., 1993). In the present study COD was found to be ranging from 11 mg/l (minimum) to 24 mg/l (maximum) with average value of 17.50+9.19 at all the sites.

Alkalinity of water is a measure of weak acid present. Total alkalinity of water is due to presence of mineral salt present in it. Alkalinity was ranged between 123.00 mg/l (minimum) to 240.00 (maximum) mg/l with average value of 181.50+82.73 mg/l from all the sites.

Total hardness is the parameter of water quality used to describe the effect of dissolved minerals (mostly Ca and Mg), determining suitability of water for domestic, industrial and drinking purpose attributed to presence of bicarbonates, sulphates, chloride and nitrates of calcium and magnesium (Taylor, 1949). The variation in Total hardness during study period at all the sites was recorded as

mg/l to 475.00 mg/l with average value of 352.50+173.24 mg/l

Chlorides occur naturally in all types of water. High concentration of chloride is considered to be the indicators of pollution due to organic wastes of animal or industrial origin. Chlorides are troublesome in irrigation water and also harmful to aquatic life (Rajkumar, 2004). The levels of chloride in the present study were ranging from 18.00 mg/l (minimum) to 32.00 mg/l (maximum) with an average value of 25.00±9.90 mg/l at all the sites.

Fluoride concentration is an important aspect of hydrogeochmistry, because of its impact on human health. The recommended concentration of Fluoride in drinking water is 1.50 mg/l. The values recorded in this study was ranged between 0.40 mg/l (minimum) to 1.20 (maximum) mg/l with an average value of 0.80±0.57 mg/l from all the sites.

Table 1: Physico-chemical qualities of river water

Where D.O.= Dissolved Oxygen, BOD= Biochemical Oxygen Demand, COD= Chemical Oxygen Demand, TH= Total Hardness.

The present study concluded that river water of study area was moderately polluted in respect to analyzed parameters. pH, total hardness, chloride and fluoride were found within permissible limit but the higher values of BOD and COD in present study attributed river water was not fit for drinking purpose. It needs to aware local villagers to safeguard the precious river and its surrounding

APHA. Standard methods for the examination of water and wastewater.18thEdition, Washingoton, D.C 1992

Abida, B. and Harikrishna Study on the Quality of Water in Some Streams of Cauvery River, E- Journal of Chemistry, 5, (2): 377-384. 2008.

Eletta O. A.A Llnd Adekola F.A.. Studies Of The Physical and

Chemical Properties Of Asa River Water, Kwara State, Nigeria. Science Focus Vol, 10 (l), 2005 pp 72 76.

Jonnalagadda, S.B., and Mhere,G. Water quality of the odzi river in the eastern highlands of zimbabwe.Water Research, 35(10): 2371- 2376. 2001

Meitei, N.S., Bhargava and Patil, P.M. Water quality of Purna river in Purna Town, Maharashtra state. J. Aqua. Biol., 19- 77, 2005

Manjappa,S.,Suresh,B., Arvinda, H.B., Puttaiah, E.T., Thirumala,S. Studies on environmental status of Tungabhadra river near Harihar, Karnataka (India),J. Aquqa. Biol, vol 23(2): 67-72,2004

Mishra, A., Mukherjee, A. and Tripathi, B.D. Seasonal and Temporal Variation in Physico- Chemical and Bacteriological Characteristics of River Ganga in Varansi. Int. J.Environ. Res., 3(3): 395-402.2009

Rajkumar, S., Velmurugan, P., Shanthi, K., Ayyasamy, P.M. and Lakshmanaperumalasamy, P.(2004). Water Quality of Kodaikanal lake, Tamilnadu in Relation to PhysicoChemical and Bacteriological Characteristics, Capital Publishing Company, Lake 2004, pp.339- 346

Trivedi, R.K. and Goel, P.K. Chemical and biological methods

for water pollution studies. Environ. Publication, Karad. Maharashtra, India ,1994.

Usharani, K., Umarani,K., Ayyasamy, P.M., Shanthi, K.Physico- Chemical and Bacteriological Characteristics of Noyyal River and Ground Water Quality of Perur, India. J. Appl. Sci. Environ. Manage. Vol.14(2) 29-35,2009

ACKNOWLEDGEMENT

I would like to thank principal of RajaRajeswari College of Engineering and Management of RajaRajeswari Group of Institutions for extending encouragement and support to present the paper in the International Conference at T.John College of Engineering, Bangaluru

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A woman and her son cross the Mithi River in Mumbai. SEBASTIAN D'SOUZA/AFP/Getty Images

Dying Waters: India Struggles to Clean Up Its Polluted Urban Rivers

India’s booming population and rapidly expanding urban areas have exacted a huge toll on its rivers, which are badly polluted and choked by development. But in cities across India, activists are heading to court to force municipalities and states to take action.

By Vaishnavi Chandrashekhar • February 15, 2018

Standing on a small concrete bridge, environmental activist Janak Daftary gestures toward the crowded banks of the Mithi River, which runs through the heart of Mumbai.

On one side are garages with heaps of car parts that slope into the river, bleeding paint, metals, and oil into the Mithi, a mere 120 feet wide at this point. On the other side are shanties made of brick, tin, and plastic; metal scrap dealers; and a middle-class housing complex flanked by concrete walls that plunge into the water. Below the bridge, a dark slurry with floating bits of plastic, cloth, and rubber slowly passes downstream, toward the office buildings and construction cranes of Mumbai’s new financial district.

“This is how you kill a river,” says Daftary, an engineer who works with Jal Biradari, a water conservation group.

Along with Vanashakti , a Mumbai-based environmental organization, Daftary’s NGO prevailed in a case in India’s Supreme Court last August involving the restoration of the Mithi. The top court reprimanded the local authorities for their neglect and directed independent experts to assess measures taken to date and recommend additional remedies to reverse the degradation of the Mithi.

India has seen a string of such judicial rulings involving urban rivers in recent years, as the country comes to grips with the widespread pollution that has fouled waterways and with runaway development that has destroyed or damaged wetlands and floodplains. Across major cities, environmentalists and citizens are engaged in prolonged, seemingly intractable battles to clean up local rivers - mainly through legal petitions intended to force authorities to take action or, in some cases, to stop them taking damaging measures, such as constructing concrete flood walls that hem in the river. Some of these battles have been triggered by recent floods and made more urgent by projections of increased extreme rain events and other climate risks.

The sacred Ganges has been at the center of a legal battle focused on the failure of a government plan to clean up the river.

In the technology hub of Hyderabad, activists went to the National Green Tribunal , a quasi-judicial authority, in 2015 to prevent illegal construction near the city’s Musi River. In Chennai, in South India, citizens have petitioned the tribunal to stop pollution of the Cooum River, as well as to ensure proper dredging of a large canal to remove silt and improve flow. In New Delhi, activists have been fighting one legal case after another over the years to keep the floodplain and river bed of the Yamuna, a major tributary of the Ganges, free of myriad developments, including a subway depot and road.  And the sacred Ganges, which runs through five Indian states, has been at the center of a legal battle by environmentalists and citizens frustrated by the failure of a government plan to clean up the badly contaminated river. 

Rivers and streams have borne the brunt of the recent urban explosion in India, a nation whose population has nearly doubled in the last 40 years to 1.35 billion. Unplanned growth has led to the use of water bodies as dumping grounds for sewage and industrial effluent. According to India’s Central Pollution Control Board, 63 percent of the urban sewage flowing into rivers (some 62 billion liters a day) is untreated. In addition, riverbanks, wetlands, and floodplains have been claimed over time by infrastructure, slums, offices, and housing developments - all of which has narrowed natural river channels and distorted flow, greatly reducing the ability of India’s rivers to buffer flooding. It also has taken a toll on biodiversity. 

The cost of this abuse has mounted over the years. A study last year linked increasing cases of typhoid, hepatitis, and diarrhea in New Delhi to severe pollution in the Yamuna River, which provides much of the city’s drinking water. Large stretches of the Yamuna, as well as Chennai’s Cooum and Mumbai’s Mithi and Ulhas rivers, are considered dead zones, with oxygen levels too low to support most fish life.

Men search for coins and recyclable items along the banks of New Delhi's Yamuna River. PRAKASH SINGH/AFP/Getty Images

Environmentalists blame the failure of past cleanup efforts on a host of problems: The political clout of industries, contractor-driven boondoggles, weak enforcement by pollution-control agencies, and clashing government departments. The $3 billion initiative to clean up the Ganges, a flagship project of Prime Minister Narendra Modi, must navigate the politics of five states, numerous cities, and multiple central government agencies. Renowned hydrologist Madhav Chitale resigned from the main Ganges cleanup initiative last year partly because, he said, “some people [in the mission] are focused on religious and cultural issues rather than on the technical remedies.”

He and others point to the Sabarmati River in Gujarat, Modi’s home state, as an example of sound urban river restoration. For decades, the Sabarmati - which runs through the state capital of Ahmedabad - was just another dirty, seasonally dry river. Then architects gave it a makeover, clearing out the slums along its banks and creating a channel of clear water bordered by a long concrete waterfront. The creation of attractive riverfronts is seen by many as key to mobilizing public support for conservation.  But some have criticized the Sabarmati project for focusing on beautification rather than ecological restoration. Water was brought from another river to keep the channel full, and pollution has simply been pushed downstream, said Himanshu Thakkar, coordinator of the South Asia Network on Dams, Rivers & People , a conservation group. “We don’t have a success story yet,” he said.  

The cost of the damage to India’s rivers was made painfully clear in December 2015, when Chennai experienced severe rainfall that overwhelmed its river and canal network. The region’s small rivers had been extensively manipulated over the years and had lost their floodplains to urban development, says Jayshree Vencatesan, managing trustee of Care Earth Trust . “Unless their flow is managed as a grid, they cannot perform their ecosystem services,” said Vencatesan.

For much of its run, Mumbai’s Mithi River is a glorified sewer serving small workshops, slums, housing developments, and a business center.

The Chennai floods took nearly 300 lives, damaged thousands of homes and businesses, and paralyzed the airport, which is partly built over the Adyar River, all leading to an estimated $3 billion in losses to the city’s economy. The flood brought attention to the assault on the region’s natural systems, with marshland shrinking by 45 square miles from 1980 to 2010, according to a study by Care Earth Trust. The disaster provided new impetus to long-pending cleanup plans for the Cooum River, which had languished for decades. Last year the official Chennai Rivers Restoration Trust obtained environmental clearances for a major restoration project.

A similar disaster unfolded in Mumbai on July 26, 2005 when an unprecedented monsoon deluge drowned the financial capital, killing more than 900 people, damaging a quarter-million homes, and causing an estimated $2 billion in economic losses. This inundation made Mumbai residents suddenly aware of the presence of the Mithi River in their midst. A modest channel that begins in suburban hills, the Mithi winds 11 miles down to the Arabian Sea. For much of its run, the river is a glorified sewer serving small workshops, slums, housing, the airport, and a business center. All were inundated on that fateful day when the conjunction of high tide and extreme rain caused the river to overflow its banks and flood the city.

A restored wetland park on Chennai's Adyar River. VAISHNAVI CHANDRASHEKHAR/Yale e360

Since then, multiple studies have decried the systematic destruction of the Mithi, pointing to a host of assaults: The airport’s runway had been built over the river, narrowing the channel and forcing it into a 90-degree bend, and a new office district had been built on wetlands. One satellite study found that from 1966 to 2005 the width of the Mithi was reduced by almost 50 percent, while mudflats had shrunk by 70 percent. The experts proposed solutions: close polluting businesses and industries, collect garbage, install sewage plants, restore the banks, dredge the river, create a buffer zone, and nurture the mangroves to absorb future floods. 

Last August, intense rainfall came perilously close to causing another major flood in Mumbai. That same month, the Indian Supreme Court condemned the lack of progress in restoring the Mithi following the 2005 floods. Despite much expenditure, the river is still filthy and continualy encroached upon, most recently by the dumping of debris from construction of a new subway. Municipal authorities have been slow to set up sewage treatment plants, and the few treatment projects underway don’t hew to expert recommendations. The National Environment Engineering Research Institute (NEERI) and the Indian Institute of Technology Bombay had called for setting up as many as 37 small sewage plants along the river, rather than a few large ones - a recommendation the city has so far ignored.

“The model from developed countries in which all sewage is taken and treated in one place appears to be impossible here because planning is always far behind population growth,” said NEERI director Rakesh Kumar. In this context, he said, a decentralized approach might work better.

Mumbai has taken some steps in recent years, mainly for flood prevention. Municipal authorities have spent S100 million dredging and widening the river at its narrowest points, and the regional planning agency, which controls the last 3.7 miles of the river, has spent millions more removing silt, demolishing encroaching structures, and resettling hundreds of slum dwellers. 

The Mithi’s crowded banks point to the social challenges of these cleanup efforts, especially in a city where half the population lives in slums.

But the Mithi’s crowded banks point to the social challenges of these cleanup efforts, especially in a city where half the population lives in slums. Relocating slum dwellers and industries takes time - land must be found, consent obtained, people and businesses shifted. Often people are forced out and homes demolished willy-nilly, as has happened on Chennai’s riverbanks. Rehabilitation sites are usually far away, disrupting community and employment networks. In the neighborhood of Kalina, along the Mithi, residents are furious about having to possibly move to a resettlement complex near polluting oil refineries. Such action seems especially unjust since entities such as the airport and the financial complex have expanded into the river’s flood plain, and they are not being told to leave.

“If everyone is to blame, why target the slums?” asked Fayzah Khan, a local resident.  

One morning, Daftary and I visited a newly walled stretch of the river along the Bandra-Kurla office district. His group has challenged the construction of such walls. He pointed out how the thick concrete flood barrier was separating the river from its traditional floodplain. Deprived of water, the mangroves that have long flourished on the banks were dying. 

Once the trees are gone, Daftary fears, these patches will be labeled wastelands and built over - not an uncommon occurrence in this city of soaring real estate values and powerful builders. In the meantime, he says, the walls are destroying the synergy between land and water. 

“The river bank,” he says, “is exactly that - a bank, a repository of wealth, a source of livelihood, water, and biodiversity.”

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The great indian thirst: the story of india's water crisis, solutions to tackle it, the country is staring at a grave water crisis unless we get our act together, and fast..

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The great Indian thirst: The story of India's water crisis, solutions to tackle it

Ominously for India, history seems to be repeating itself. A NITI Aayog report in 2018 stated bluntly that 600 million people, or nearly half of India’s population, face extreme water stress. That three-fourths of India’s rural households do not have piped, potable water and rely on sources that pose a serious health risk. That India has become the world’s largest extractor of groundwater, accounting for 25 per cent of the total. That 70 per cent of our sources are contaminated and our major rivers are dying because of pollution. Its conclusion: ‘India is suffering from its worst water crisis in its history.’

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How river pollution is killing people in an Indian village

Dozens of villages near India’s capital are suffering after years of unchecked industrial pollution has contaminated their water.

Vikas in his house in Gangnauli, Uttar Pradesh, India.

Gangnauli, India – Vikas Rathi lies, barely alive, on a cot in the sparsely furnished living room of a small two-story house in Gangnauli village in the northern state of Uttar Pradesh. The 23-year-old’s gaunt cheeks highlight his pinched nose and sunken eyes even more.

Vikas has been diagnosed with stunted growth and bone deformity. He is one of the hundreds of young adults and adolescents across the region who are afflicted by a host of ailments: stunted growth, liver diseases, cancers, and critical deformities.

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In Gangnauli – home to about 5,000 people and located about 180km (110 miles) from India’s capital New Delhi – about a third of the youth are sick.

Villagers say the diseases are striking more and more people, affecting almost every household. The contaminated groundwater they have been drinking, they say, is destroying their health.

More than 71 people died of cancer in Gangnauli alone between 2013 and 2018, according to data released by the National Green Tribunal (NGT) in 2019, the only official figure available.

Satendar Rathi, Vikas’ father, says his eldest son Vikas, whose name means growth in the Hindi language, has been bedridden since 2010

He was born healthy, his father continues, but his bones started deforming soon after he started drinking and eating solid food.

“We took him for traditional as well as English [modern] medicine treatment. Doctors suggested vitamin D supplements. We continued his treatment for nine years but nothing worked,” Satendar, a 48-year-old constable in the Delhi police, says as he sinks into a chair in the living room on the banks of the Krishna River.

His modest salary of $490 a month can barely cover medical expenses for Vikas.

“Finally, the doctors in Delhi told us there is a problem with the water we were consuming,” Satendar told Al Jazeera, referring to the groundwater.

“We can’t leave him alone for even a minute. If there is no one around he urinates and passes stool in his pants,” says Satendar, sighing helplessly as Vikas looks hauntingly at us.

“Vikas is a living corpse,” he says.

The polluted Krishna river, Uttar Pradesh, India.

Carcinogens in the water

The NGT – the country’s top environmental court – confirmed in 2017 that water was indeed the cause of the mass sickness in villages across five districts in western Uttar Pradesh after the crisis was brought to its attention by environmental campaigners and it tested the groundwater and river water.

In the villages that did not have a piped water supply, villagers were drinking polluted groundwater pulled up by hand pumps.

The NGT recommended a door-to-door medical survey across the 48 hardest-hit villages in the region. It also called for providing piped drinking water, the establishment of specialised hospitals, and curbs on industrial effluents, among other measures.

But the health department in the state – India’s most populous – has not followed through on most of the recommendations, Al Jazeera found.

Dr Dinesh Kumar, chief medical officer of Baghpat district, where Gangnauli is located, admitted that carcinogenic elements had been found in the water.

“It is true that heavy elements and carcinogenic elements are present in the water but we can’t say for sure that they are responsible for cancer in the area. I am saying this because further studies have not been done on the cases studies found here to explore the links between the two,” he told Al Jazeera.

He added that a survey had been conducted more recently as part of anti-COVID health measures, during which officials were directed to identify cancer patients and people with co-morbidities.

“We found cases of skin diseases. Cases of Hepatitis C are found higher than usual in these villages.”

Industrial pollution

The fertile soil of the upper Doab region – the river basin of the Ganges and Yamuna Rivers – was home to a substantial agricultural community. Water from the Kali, Krishna and Hindon Rivers – important tributaries of the Yamuna River to the west – used to be a source of life and livelihood in the region some 20 years ago.

But Doab’s proximity to the capital led to many of its cities, such as Meerut, Baghpat, Saharanpur, Gautam Buddh Nagar and Ghaziabad, becoming industrial centres.

Polluted Krishna river.

Dharmendar Rathi, the former village head of Gangnauli, says the groundwater started becoming poisonous as industries and mills started proliferating in the area , operating without the waste-treatment facilities they are required to have.

The industrial waste from sugar mills, slaughterhouses, paper mills, dye-making industries and distilleries empties into the rivers, turning them into sewage canals. Eventually, the unchecked industrial waste dumping contaminated the groundwater.

Dharmendar says: “Most of us kept drinking it till the last few years, our cattle drank it, and we used it to irrigate our farm and vegetables.”

He tells Al Jazeera there isn’t a single household in the village without a critically ill family member and that more than 200 people in Gangnauli had to sell their land to pay for medical expenses.

Many families have gone bankrupt treating their sick members, running from one hospital to another due to a lack of adequate health facilities in the state of 204 million people, he says.

“Our estimate suggests that more than 150 in this village alone have died of cancer, there are numerous cases of hepatitis, skin allergies and deformities. Just imagine the number of victims in other affected villages in this region.

“The future of this region is gone, the next generation has been destroyed at birth,” he says, showing a long list of villagers who died of cancer in the last decade.

Appealing to the NGT

Chandraveer Singh, from the nearby village of Daha, says his sister-in-law Urmila died of liver cancer earlier this year.

According to the 65-year-old retired scientist, people in more than 100 villages on the banks of the Kali, Krishna and Hindon Rivers have been drinking polluted groundwater for the last decade.

After he retired in 2013, Chandraveer, who worked at the pollution control board in the neighbouring state of Haryana, started working on water pollution in western UP. He petitioned the NGT in 2014 to intervene on the issue.

In 2014, he sent water samples from the Krishna for testing at SIMA Labs. SIMA labs are recognised by the Federal Ministry of Environment and Forests, and the Uttar Pradesh Pollution Control Board (UPPCB).

The results were disturbing – they confirmed an extremely high content of heavy metals and chemical compounds like arsenic, mercury, lead, zinc, phosphate, sulfide, cadmium, iron, nickel and manganese. All heavy metals are linked with cancer, bone deformity, and stomach-related diseases.

The total suspended solids in the river water measured 7,500mg/litre, as against the permissible 200mg/litre. The presence of sulfide was 285mg/litre as against the permissible 2mg/litre.

Extremely high levels of mercury and lead were also found. Lead was 0.115 as against the permissible limits of 0.01 mg/litre. Mercury was 0.12 mg/litre against the permissible limits of 0.01 mg/litre.

“No aquatic life survives in the river water,” says Chandraveer.

State of health services

Dharmendar says the local community health centres lack resources.

“The public health centres in the vicinity are not equipped to deal with a problem of this magnitude. Only a nurse or the doctor’s assistant is generally present at the health centres,” he says.

The closest big hospital is in Meerut – the largest city in the region – about 56km (35 miles) east of Gangnauli.

“The government hospital in Meerut is overcrowded and patients do not get the care they deserve,” he says, adding that there are not enough doctors.

Gangnauli villagers, India.

The state, currently being governed by Prime Minister Narendra Modi’s Bharatiya Janata Party (BJP), ranks at the bottom of the health index prepared by the NITI Aayog – the government policy think-tank.

But the health crisis has hardly made it to the political agenda in the state as successive governments ignored the health issues people face. “What is the meaning of democracy when my people are dying of unexplained sickness and death? For decades we drank toxic water,” Dharmendar says.

“How could we dream of becoming a vishwa guru [super power] when we can’t provide the basic facilities which are essential to our fundamental right to life?”

Local BJP legislator Krishan Pal Singh defended the government, blaming previous governments for doing nothing to address the issue.

“Whatever relief people have got on this subject, happened under the BJP government,” he told Al Jazeera. The BJP came back to power in UP in 2017 after a gap of 15 years.

“When we came to power, we were given a state which barely saw any development. So it might take some time to solve people’s problems,” he adds.

NGT recommendations

Four years since the country’s top environmental watchdog recommended measures, local authorities have only partially implemented them.

Most of the polluting industries, mainly sugar mills, distilleries, electroplating workshops and slaughterhouses, continue to dump effluent into the rivers with little or no facilities put in place to treat industrial waste.

The NGT formed a supervisory committee in 2018 to monitor the implementation of its recommendations. The committee in its four reports since 2019 said no meaningful action had been taken by authorities to clean up the Kali, Krishna and Hindon Rivers. It accused Uttar Pradesh officials of “apathy” and even “stonewalling” its action plan and monitoring.

In its last directive – released in February 2021 and seen by Al Jazeera – the NGT notes that officials “did not comply” with most of its recommendations. The state government has not cooperated and its attitude was “disappointing”, the NGT said.

Out of the total of 133 sewage drains that needed to be covered, only 20 were covered and the remaining 113 are “in the process of being tapped”, as the progress report submitted by the government mentions. The sewage drain tapping would help control the spread of diseases.

Some of the recommendations, such as the preparation of micro plans to prevent groundwater pollution by industrial effluents, and identify and deal with other sources of water pollution – covering the entire stretch of drains, and identifying causes of ailments like skin diseases, jaundice and cancer – were not complied with, according to the February 2021 NGT order.

The only work that has been done to some measure is providing piped drinking water to more than 50 percent of the residents in these 150-plus villages, the committee said.

Local health officials in Baghpat told Al Jazeera COVID-19 had prevented them from making any plans. Singh, the local BJP legislator, also blamed the pandemic for the delay in implementing the NGT recommendations.

The NGT had highlighted repeatedly how the UPPCB couldn’t finish work on its recommendations: bio/phytoremediation of drains (using plants and micro-organisms to clean industrial effluents), covering drains, installing sewage treatment plants in water-polluting industries.

A senior official from the UPPCB, who wished to remain anonymous, told Al Jazeera: “As we mentioned in our ‘action taken report’ submitted before the NGT, bioremediation work on several drains over a total stretch of 76km is being done. The bioremediation on drains in Shamli, Muzaffarnagar and Baghpat has been initiated.

“[W]ork on the installation of sewage treatment plants in Muzaffarnagar and Budhana will be done soon. Work on the one in Saharanpur will be started soon,” he said, adding, “it will take some time before the work is completed.”

“By law, the industries are supposed to have a sewage treatment plant (STP) installed before they operationalise the factory. But, courtesy of corruption, in most cases the industries bribe officials and start functioning without an STP which is supposed to treat the effluents. So the state government is penalising the industries now in a big way, and pushing them to have an STP in their factories,” he added.

He added that among the decisions the UPPCB has taken to mitigate pollution is the imposition of a fine of 11.32 crore rupees ($1.41m) as environmental compensation on 230 industries for polluting river water in the last four years.

Environmental campaigner Chandraveer isn’t hopeful.

“The institutional and bureaucratic dysfunction of the world’s largest democracy continues to deprive the remaining residents of safe and clean drinking water,” he tells Al Jazeera.

case study on water pollution in india

Water pollution in rivers: A long pathway to a better tomorrow

The Ganga, perhaps the most revered river globally, is also unfortunately one of the most polluted today

case study on water pollution in india

By Vijay Rana, Kishore Kumar Thakur

Published: monday 06 may 2024.

case study on water pollution in india

This article has been updated

Around 71 per cent of the Earth’s surface is covered by water, mostly in the form of oceans. More than 68 per cent of Earth’s freshwater is stored in ice caps and glaciers, with just over 30 per cent found in groundwater. Only about 0.3 per cent of our freshwater is found in the surface water of lakes, rivers and swamps. 

The rest of all the water on Earth, more than 99 per cent, is unusable by humans and many other living things. It’s remarkable that the water sustaining all terrestrial and aquatic life on our planet is actually quite scarce. This realisation emphasises the need to use this resource wisely. 

Educating ourselves and future generations is a crucial first step in achieving this goal. So, the lesson teaches us that rivers are not just sources of water, but rather the backbone of human civilisation. Rivers are vital to life because all life forms depend on them. Rivers provide us with freshwater, which is essential for farming, drinking, transportation, electricity generation and recreational activities.

According to a study conducted by UNICEF and WHO, approximately one in four individuals worldwide lacks access to safe drinking water. Similarly, the World Bank highlighted that the health costs attributed to water pollution in India constitute around 3 per cent of the nation’s GDP, totalling nearly $6.7-8.7 billion on an annual basis. 

The overall cost of environmental degradation in India is estimated to be approximately $80 billion. Furthermore, an estimated 37.7 million people in India suffer from waterborne illnesses annually, encompassing gastrointestinal diseases, cholera, dysentery, hepatitis A and typhoid. Beyond its economic impact, the inadequate provision of water, sanitation and hygiene contributes to the loss of millions of lives each year in India and globally.

In India, rivers are worshipped and since ancient times, River Ganga has been revered as the most sacred and spiritual river. It holds a distinct place culturally, spiritually and environmentally. It is often referred to as Mother Ganga out of profound reverence. The water of Ganga ( Gangajal ) is not solely intended for human use, irrigation and fishing but also for the purification of sins and devotion to God, according to Hindu beliefs. 

The Ganga, perhaps the most revered river globally, is also unfortunately one of the most polluted today. The river is being used to carry untreated waste, disposed idols as well as human and animal remains, sewage, chemical waste and wastewater and other garbage. This situation is not unique to the Ganges but extends to other rivers like the Sabarmati and Yamuna as well. 

Some factors primarily contribute to the condition of rivers, including unethical behaviour by individuals, uncontrolled industrial activities, discharge of untreated sewage effluents into rivers by municipalities and improper waste disposal in small cities and towns.

The central and state governments have indeed made efforts to conserve rivers. The Indian Government has launched several programmes and policies aimed at the conservation and rejuvenation of rivers across the country. Some notable initiatives include: Namami Gange (National Mission for Clean Ganga), National River Conservation Plan, National Mission for Clean Chambal, National Mission for Clean Narmada and National River Linking Project. 

Also, the Central Pollution Control Board, along with various state pollution control boards, undertake initiatives aimed at cleaning and conserving rivers in India. These initiatives typically involve monitoring and regulation, enforcement of environmental laws, capacity building and awareness, implementation of river rejuvenation projects, and research and development. But even after so many efforts by the central and state governments, this problem remains unresolved.

The main reason for these issues lies within ourselves, as the garbage thrown into the rivers is discarded by us. Therefore, it is imperative for us to take the initiative to keep rivers clean. Only then can we raise awareness among society and individuals and we must pledge that the river, which selflessly sacrifices everything for human civilisation, deserves to be kept clean in return. 

In this context, government organisations and society will need to play an active role in implementing measures such as banning plastic, ensuring proper waste disposal in cities, towns, and even small towns, wastewater treatment, promoting awareness, organising river cleanup campaigns, monitoring water quality regularly and collaborating with non-profits. Otherwise, every household may have access to tap and water, but no one will be healthy. Because you will reap what you sow. 

Rivers not only provide water, but also give life. In the Hindu religion, the final journey of human life culminates in the embrace of a river such as the Ganga. Therefore, it is not only significant to worship rivers but also imperative to keep them clean. Only then can the last voyage of life achieve salvation in pure water.

Vijay Rana and Kishore Kumar Thakur are assistant professors at Dr Yashwant Singh Parmar University of Horticulture & Forestry, Solan, Himachal Pradesh, India.  Views expressed are the authors’ own and don’t necessarily reflect those of Down To Earth

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The fluoride dynamics of the Dharmagarh Block of Kalahandi District, Odisha, India, and associated health risk assessment have been studied. Complex data matrices were evaluated using groundwater quality index, fluoride pollution index, and principal component analysis to understand the geological evolution and identify potential sources for fluoride pollution. The study region comprises granite, granitic gneiss, and khondalite of hard and compact rock of Precambrian Eon, which supplies mostly the fluoride-bearing minerals. Altogether thirty-four (34) groundwater samples across the entire study area were collected and subjected to various physico-chemical analyses. The majority of the groundwater in the proposed region is hard to very hard type with Mg-HCO 3 and Na-HCO 3 being the two dominant facies. Groundwater contains fluoride in concentrations ranging from 0.21 to 2.26 mg/L. The statistical analysis of the quality parameters reveals the moderate positive correlation of fluoride with sodium (0.392) and pH (0.313) and week positive correlation with EC, TDS, TH, TA, Mg 2+ , and HCO 3 − , which directly depicts the initiation of fluoride problem within the study area. Based on the water quality index, 23.53% samples are good, 73.53% are poor, and 2.94% are very poor in nature. With respect to fluoride pollution index, 5.88% samples show high pollution, 55.88% samples show medium pollution, and 38.24% of samples show low pollution index. Human health risk assessment has also been carried out using the hazard quotient of fluoride. Altogether 70.59% of samples show Total Hazard Index (THI) values < 1 suggesting low risk of cancer and within the permissible range, whereas 29.41% of samples show THI > 1 suggesting the non-carcinogenic risk of pollutants, which exceeds the allowable limit for all the classes of male, female and children.

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Acknowledgements

The first author is very much thankful to DST, Govt. of Odisha for providing financial support for carrying out the major research project No. 1427/ST, ST-SCST-MISC-0015-2019 dated 06.03.2020.

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Mahanta, N., Goswami, S. Groundwater vulnerability to fluoride pollution and health risk assessment in the western part of Odisha, India. Environ Sci Pollut Res (2024). https://doi.org/10.1007/s11356-024-33620-3

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