Treatment and Purification

Solid waste is increasing in the city due to growth of population, urbanization, higher per capita income and standard of living, changing lifestyle and food habits.

The first section of the paper explains about the structure of the solid waste in the city. The solid waste according to its constituents is presented in the second section. The third section of the paper explains about the regression result. The last section deals with the policy implication and conclusion.

This case study in National Institute of Science Communication and Information Resources (NISCAIR) by the Central Institute of Mining and Fuel Research (CIMFR), Dhanbad and the Geo-Environment Division (Environment Management Group) deals with groundwater quality assessment of Jharia coalfield area of West Bengal. The physiochemical characteristics of groundwater of the upper catchments of the coalfield were studied to evaluate the water quality.

This thesis by Christina Tang for the Center of Environmental Studies, Brown University deals with a study of water quality and attempts to ascertain the net benefits or costs from rainwater harvesting under a variety of scenarios for households in various water supply conditions.

Eighty percent of the 7,00,000 citizens of Kuttanad, a region in the coastal State of Kerala have no access to clean water. In Kuttanad, intensive untreated human sewage and agricultural activities have caused severe surface water contaminations. At the same time, other sources of freshwater are unreliable for drinking: groundwater is acidic due to the soil conditions and iron leaching; freshwater from public tap is infrequent; and water supply from private vendors is extremely expensive.

This evaluation study report by the Programme Evaluation Organisation, Planning Commission attempts to document the major achievements in rural water services under Rajiv Gandhi National Drinking Water Mission. It does so by assessing the extent of coverage and access to improved services in the rural areas.

The article informs that access to safe drinking water remains an urgent necessity, as 30% of urban and 90% of rural households still depend completely on untreated surface or groundwater.

While access to drinking water in India has increased over the past decade, the tremendous adverse impact of unsafe water on health continues. It is estimated that about 21% of communicable diseases in India are water related.

Although some degree of intervention in terms of chlorination and monitoring of water quality exists in major cities and towns, rural India, which constitutes the bulk (70%) of the population, is usually deprived of such interventions. The population in rural India is mainly dependent on the groundwater as a source of drinking water. As a quality concern the groundwater is often found to be contaminated with fluoride, arsenic, iron and salts. In recent years, fluorosis has emerged as major public health issue in rural India.