Treatment and Purification

This draft report on the study of lakes by the World Wildlife Fund for Nature (India) documents the physical condition of the lakes in Mumbai. Apart from the three lakes - Tulsi, Powai and Vihar that used to provide water to Mumbai residents, there are many lakes in the Bombay Municipal Corporation jurisdiction that are either polluted by human sewage or industrial effluents and have remained neglected with increasing urbanization.

There is very little to no data available on the existence of lakes of Mumbai. Several RTI’s to the government bodies also revealed that there was a lacuna in terms of the availability of the data; as a result most of the water bodies are easily exploited. Under this study the baseline data was prepared with the help of Google Earth website. The areas appearing to be lakes were marked on the Google Earth Images. These were verified by the field staff through onsite visits. The survey was conducted during September and October, 2008 and March, 2009. The study considers only the fresh water lakes which were accessible and saline water impoundments have not been considered.

The level of nitrate in drinking water was tested from groundwater artesian wells located within farms and surrounded by crops (mostly rice and wheat rotations).

Nitrate pollution in groundwater is associated with nitrogen loads in the environment. In urban areas, it is associated with sewage and in agriculture areas, with livestock sources and nitrogen fertiliser inputs. Nitrate pollution in drinking water can have serious health impact on humans, especially for babies and children. The most significant potential health effects of drinking water contaminated with nitrate are the blue-baby syndrome (methemoglobinemia) and cancer.

This report presents the findings of a study conducted by CPCB with the help of Indian Institute of Technology, Roorkee and Anna University, Chennai  on the performa

Now-a-days heavy metal arsenic poses a health risk problem throughout the world. Arsenic may be found in water which has flowed through arsenic-rich rocks. Severe health effects have been observed in populations drinking arsenic-rich water over long periods in countries world-wide.

This study was commissioned recognizing the fact that discharge of untreated sewage occurs not only because of inadequate installed capacity of sewage plants, but also due to the inadequate maintenance of existing plants.

This discussion paper by the Asian Development Bank (ADB) examines the current state of sanitation services in India and offers recommendations that can help key stakeholders work toward universal sanitation coverage in India.

Providing environmentally-safe sanitation to millions of people is a significant challenge, especially in the world’s second most populated country. The task is doubly difficult in a country where the introduction of new technologies can challenge people’s traditions and beliefs.

This discussion paper examines the current state of sanitation services in India in relation to two goals—Goal 7 of the Millennium Development Goals (MDGs), which calls on countries to halve, by 2015, the proportion of people without improved sanitation facilities (from 1990 levels); and India’s more ambitious goal of providing “Sanitation for All” by 2012, established under its Total Sanitation Campaign.

Content courtesy: India WASH Forum

The programme focused on community involvement in assessing and evaluating water quality.

Image courtesy: www.projectsmonitor.com

Under the Water (Prevention and Control of Pollution) Act, 1974, every industry has to provide adequate treatment of its effluents before disposal, irrespective of whether it is in stream, land, sewerage system of sea. The small scale industrial units (SSI), which are presently defined as units whose plant and machinery are valued at less than Rs. 5 crore occupy an important place in the country's economy. The SSIs are a major contributor to the total industrial pollution load of the country. However, only a small fraction of the effluent discharge from these units is estimated to be treated as on date.

This evaluation report by the Indian Institute of Management (Lucknow) of the Central Pollution Control Board (CPCB), a central institution established to set environmental standards for all parts of the country focuses on strengthening of CPCB and its preparedness to undertake various measures as suggested by environmental statutes.