While the Central Pollution Control Board's recent study highlights the problems with rivers today, it does not have clear-cut recommendations or actions to resolve them.
According to a recent study by Central Pollution and Control Board (CPCB), almost half of India's interstate rivers are polluted and are of no use to anyone, thus increasing the possibility of worsening disputes over river-sharing among states. Although India has a rich network of rivers, with nine river systems spanning as high as 81 percent of the geographical area, and a per capita water availability of 1720.29 cum per annum, water availability from rivers is increasingly being threatened due to rampant pollution from untreated domestic sewage, and industrial effluents making it unfit for drinking or any other purpose.
The sewage generated from 650 cities and towns situated along the 302 polluted river stretches in the country has increased from 38,000 million litres per day (MLD) in 2009 to 62,000 MLD in 2015. Sewage Treatment Plants (STPs) have been unable to cope with the sewage that has increased from 26,200 MLD in 2009 to 38,000 MLD in 2015. In fact, the study claims that this discharge of untreated sewage and industrial waste into rivers has emerged as a major cause of pollution in 16 of the 40 interstate rivers in the country.
What else does the study reveal?
The CPCB study looked at the water quality with respect to indicators such as Bio-chemical Oxygen Demand (BOD), Dissolved Oxygen (DO), indicator of pathogenic bacteria (Total coliform) and Total Dissolved Solids (TDS). It found that the water quality was gradually deteriorating and not prescribing to the required quality standards, thus making the river waters unfit for any use.
High presence of infection-spreading bacteria
Total coliform count is a quality parameter that is indicative of the sanitary condition of the water in terms of the presence of bacteria that can cause diseases such as diarrhoea and typhoid, among others. As high as 85 percent of the locations that were tested had a total coliform count way above the prescribed safe limits.
High pollution indicators
BOD is an indicator of the level of organic pollution in the water. The study found that almost a fourth of the river locations had BOD values exceeding the normal limits, indicating high levels of organic pollution of the rivers.
DO is the amount of free oxygen found in the water. Very high or low levels of oxygen can be harmful to aquatic life and also affect the quality of the water. Twenty-one percent of the river locations had water quality that did not ascribe to the prescribed standards.
Which rivers are most polluted?
- River Ghaggar, which passes through Haryana, Himachal Pradesh, Punjab and Rajasthan, is the most polluted, along with other rivers such as the Yamuna, Beas, Dhela, Churni, Bahela, Damanganga and Thenpennai.
- Despite the attention and resources being directed to the cleaning of the Ganga, the river has a high coliform count at a number of places.
- Despite the Yamuna Action Plan, three of the nine locations on the Yamuna have poor water quality.
- Rivers with relatively better quality include the Bhima, Krishna, Wardha, Tapi, Mahi, Chambal, Betwa, Sone, Damodar, Ramganga and Subarnarekha.
Could pollution worsen the disputes over sharing of interstate river waters?
Indeed, recent evidence shows that water pollution could become a contentious issue between upstream and downstream states that share common rivers. For example, Tamil Nadu and Karnataka are already at war, with Tamil Nadu having moved to the Supreme Court seeking to restrain Karnataka from letting untreated sewage and industrial effluents into Cauvery and its tributaries. Worry is being expressed over the polluted nature of river Bhima in Maharashtra that flows through Solapur and then into Karnataka.
Conflicts could get more complicated because of these water quality concerns in addition to the existing quantity concerns, with further limits on the availability of water resources. Recent news indicates that the war between Tamil Nadu and Karnataka is worsening because of poor rainfall in the catchment areas of the Cauvery leading to the fear of water scarcity.
- J. Joy from SOPPECOM and Forum for Policy Dialogue on Water Conflicts in India notes that issues related to pollution have not yet formally entered the tribunal discussions that have been appointed to resolve inter-state water disputes in India till now. He says, "Quality is a serious issue that needs consideration, but unfortunately we still do not have formal mechanisms to address and regulate pollution among upstream and downstream states sharing rivers. If this does not happen, then there are chances that this might increase conflicts among states in the years to come".
What is the CPCB doing to deal with the problem?
One of the functions of the CPCB under the Water (Prevention and Control of Pollution) Act, 1974 is to coordinate activities of the state boards and resolve disputes among them. The study undertaken has been one of the steps to resolve the disputes between states in relation to river pollution by trying to understand the extent of deterioration of the rivers in the country and prevent the flow of highly polluted rivers from one state to another.
The report says that the CPCB has already taken steps to deal with the situation. As one CPCB official told the Times of India, the states with identified polluted river locations have been sent letters with directions to the concerned state PCBs to deal with the pollution issues in their respective states.
The report recommends:
- All towns and cities have STPs to treat the sewage.
- Industries remove contaminants from their effluents and close all the unauthorised activities that discharge industrial effluents, sludge and chemicals into the water.
- Strict regulation of religious activities, including immersion of idols in rivers to tackle pollution.
- Procedures to ensure quantity and quality of treated sewage.
- Community participation for the cleaning of rivers, and awareness programmes.
- Improved flow pattern of rivers.
Efforts by the CPCB: too little, too late?
The report does not go beyond mentioning the polluted rivers and suggesting actions like issuing notices, nor does it seem to reflect on the issues around the present state of water conflicts. Even the recommendations that it makes seem to be nothing more than lip service, without suggestions for any constructive mechanisms that demonstrate how to actually bring about the changes that it suggests.
Dharmadhikary argues that it reflects the lack of political will on the part of the Central and State PCBs to find a solution. As a result, the actions undertaken only include issuing of notices, which do not serve any purpose as most are not taken to a logical conclusion. "The Pollution Control Board could at least set an example by taking up the case of a single industry and taking it to a logical conclusion. That might also help other industries to understand", he says.
Experts are also critical of the findings of the report. Parineeta Dandekar from SANDRP raises serious questions regarding some of the report's findings that indicate that rivers such as the Bhima, Krishna and Wardha have 'good water quality at every location'. Indeed, evidence from Maharashtra shows that Bhima and Krishna are some of the most polluted rivers in the state. Wardha is severely polluted due to acid mining discharge by Western Coal fields. Even the Cauvery has been reported to have very poor quality water as it enters Tamilnadu, which has led to Tamil Nadu taking Karnataka to the Supreme Court. She argues that the findings of the report are highly misleading and raise serious doubts regarding the way in which the study has been done and also the usefulness of the report for states to monitor pollution of their rivers.
- Re-look how we manage our rivers and develop a holistic plan to tackle pollution
The report mentions that the rivers do not have enough water to dilute pollutants. Experts argue for the need to have a complete re-look at how not only interstate rivers, but all the rivers in the country are managed, as many of the rivers have little water due to the construction of big dams over them or large-scale water diversions.
Dharmadhikary argues that a poor understanding of the treatment process undertaken to clean rivers leads to incompletely treated pollutants being dumped back into rivers thus creating the necessity to track the whole pollution chain to address the problem. A wider, holistic conceptual plan that includes all these issues needs to be broken down into smaller processes that can be tracked individually.
- Have better coordination and quality monitoring mechanisms with regulations for upstream and downstream states
Joy argues that proactive steps such as the establishment of better quality monitoring mechanisms, better coordination between CWC, CPCB and SPCBs that monitor rivers across the countries must be taken that will help bring out better data on rivers, and the establishment of regulatory mechanisms for upstream and downstream states.
The relationship between upstream and downstream states sharing a river is often asymmetric as actions of the upstream state can impact the one downstream and not vice versa. Joy says, "We should have mechanisms to incentivise upstream states to prevent polluting its river waters, maintain environmental flows of rivers with support from the Centre and also penalise states if they fail to curb the pollution with compensation for the affected. However, all this is only possible if institutional mechanisms are made to work jointly and transparently".
Meanwhile, discussions among upstream and downstream states over pollution of water sources continue to grow, with reports of fresh notices being served to state boards to control the pollution levels of their rivers. With freshwater resources declining, more and more rivers turn into sewage carriers. Also, the monsoons continue to evade us, and debates on the dangers posed by the use of untreated sewage water from rivers for agriculture rage on!
Disclaimer: This article, authored by Aarti Kelkar-Khambete, was first published in India Water Portal.
- Water pollution
- Environmental engineering
- Pollution Control
- Central Pollution Control Board
- river Yamuna
- sewage treatment
- Natural environment
- Aquatic ecology
- River Ghaggar
- river Bhima
- Krishna river