Done by

Sreeja Mohan

Water Pollution Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans, aquifers and groundwater). This form of environmental degradation occurs when pollutants are directly or indirectly discharged into water bodies without adequate treatment to remove harmful compounds. Water pollution affects the entire biosphere – plants and organisms living in these bodies of water. In almost all cases the effect is damaging not only to individual species and population, but also to the natural biological communities.

Causes Of Water Pollution

The specific contaminants leading to pollution in water include a wide spectrum of chemicals, pathogens, and physical changes such as elevated temperature and discoloration. While many of the chemicals and substances that are regulated may be naturally occurring (calcium, sodium, iron, manganese, etc.) the concentration is often the key in determining what is a natural component of water and what is a contaminant. High concentrations of naturally occurring substances can have negative impacts on aquatic flora and fauna. Oxygen-depleting substances may be natural materials such as plant matter (e.g. leaves and grass) as well as man-made chemicals. Other natural and anthropogenic substances may cause turbidity (cloudiness) which blocks light and disrupts plant growth, and clogs the gills of some fish species. Many of the chemical substances are toxic. Pathogens can produce waterborne diseases in either human or animal hosts. Alteration of water's physical chemistry includes acidity (change in pH), electrical conductivity, temperature, and eutrophication. Eutrophication is an increase in the concentration of chemical nutrients in an ecosystem to an extent that increases in the primary productivity of the ecosystem. Depending on the degree of eutrophication, subsequent negative environmental effects such as anoxia (oxygen depletion) and severe reductions in water quality may occur, affecting fish and other animal populations.

Ganga The Ganges is the largest river in India with an extraordinary religious importance for Hindus. Situated along its banks are some of the world's oldest inhabited cities like Varanasi and Patna. It provides water to about 40% of India's population across 11 states, serving an estimated population of 500 million people or more, which is larger than any other river in the world. Today, it is considered to be the sixth most polluted river in the world. A number of initiatives have been undertaken to clean the river but failed to deliver desired results.

Causes of Ganga getting polluted

Human wasteThe Ganges river basin is one of the most fertile and densely populated regions in the world and covers an area of 1,080,000 km2 (400,000 square miles). The river flows through 29 cities with population over 100,000; 23 cities with population between 50,000 and 100,000, and about 48 towns.A large proportion of the waste in the Ganges is from this population through domestic usage like bathing, laundry and public defecation.

Industrial waste

Countless tanneries' chemical plants, textile mills, distilleries, slaughterhouses, and hospitals contribute to the pollution of the Ganges by dumping untreated waste into it. Industrial effluents are about 12% of the total volume of effluent reaching the Ganges. Although a relatively low proportion, they are a cause for major concern because they are often toxic and non-biodegradable.

Impact on

Marine lifeThe results of mercury analysis in various specimens collected along the basin indicated that some fish muscles tended to accumulate high levels of mercury. Of it, approximately 50–84% was organic mercury. A strong positive correlation between mercury levels in muscle with food habit and fish length was found. The Ganges River dolphin is one of few species of fresh water dolphins in the world. Listed as an endangered species, their population is believed to be less than 2000. Hydroelectric and irrigation dams along the Ganges that prevents the dolphins from traveling up and down river is the main reason for their reducing population.

WildlifeSome of the dams being constructed along the Ganges basin will submerge substantial areas of nearby forest. For example, the Kotli-Bhel dam at Devprayag will submerge 1200 hectares of forest, wiping out the river otters and the Mahaseer fish that are found here. Wildlife biologists in India have been warning that the wild animals will find it difficult to cope with the changed situation.

Human beingsAn analysis of the Ganges water in 2006 showed significant associations between water-borne/enteric disease pop and the use of the river for bathing, laundry, washing, eating, cleaning utensils, and brushing teeth. Water in the Ganges has been correlated to contracting dysentery, cholera, hepatitis, as well as severe diarrhea which continues to be one of the leading causes of death of children in India

Protests for cleaning GangesIn early 2011, a Hindu seer named Swami Nigamanand

Saraswati fasted to death, protesting against illegal

mining happening in the district of Haridwar (in

Uttarakhand) resulting in pollution. Following his death

in June 2011, his Ashram leader Swami Shivananda

fasted for 11 days starting on 25 November 2011, taking

his movement forward. Finally, the Uttarkhand

government released an order to ban illegal mining all

over Haridwar district. According to administration

officials, quarrying in the Ganges would now be studied

by a special committee which would assess its

environmental impacts the river and its nearby areas.

Ganga Action Plan

The Ganga Action Plan or GAP was a program launched in January 1986 in order to reduce the pollution load on the river. But the efforts to decrease the pollution level in the river were unsuccessful even after spending Rs 9017 million. Therefore, this plan was withdrawn on 31 March 2000. The steering Committee of the National River Conservation Authority reviewed the progress of the GAP and necessary correction on the basis of lessons learned and experiences gained from the GAP; phase 2 schemes have been completed under this plan. A million litres of sewage is targeted to be intercepted, diverted and treated. Phase-II of the program was approved in stages from 1993 onwards, and included the following tributaries of the Ganges: Yamuna, Gomti, Damodar and Mahananda. As of 2011, it is currently under implementation. Scientists and religious leaders have speculated on the causes of the river's apparent self-purification effect, in which water-borne bacteria such as dysentery and cholera are killed off thus preventing large-scale epidemics. Some studies have reported that the river retains more oxygen than is typical for comparable rivers; this could be a factor leading to fewer disease agents being present in the water.

2010 Government cleanup campaign

In 2010, it was announced that "the Indian government has embarked on a $4 billion campaign to ensure that by 2020 no untreated municipal sewage or industrial runoff enters the 1,560-mile river. "A World Bank spokesman described the plan in 2011, saying Earlier efforts to clean the Ganga concentrated on a few highly polluting towns and centers and addressed 'end-of-the-pipe' wastewater treatment there; Mission Clean Ganga builds on lessons from the past, and will look at the entire Gangetic basin while planning and prioritizing investment instead of the earlier town-centric approach. Lobby group Sankat Mochan Foundation (SMF) "is working with GO2 Water Inc., a Berkeley, California, wastewater-technology company" to design an new Sewage treatment system for Varanasi.