GURUGRAM: Environmental activists have suspected it for long, but now, they can place actual figures against their suspicion.

Contamination of groundwater sources due to over-abstraction and discharge of polluting substances has been a long standing problem in most parts of the country. In 1974, a legislation was specifically enacted to regulate and prohibit water pollution.

In middle Gangetic plain, high arsenic concentration is present in water, which causes a significant health risk. Total 48 morphologically distinct arsenite resistant bacteria were isolated from middle Gangetic plain. The minimum inhibitory concentration (MIC) values of arsenite varied widely in the range 1–15 mM of the isolates. On the basis of their MIC, two isolates, AK1 (KY569423) and AK9 (KY569424) were selected.

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Hydrogeochemical investigations were carried out in semi-arid region of Basara to estimate the quality of groundwater for its suitability for domestic and agricultural purposes. For this region 34 groundwater samples were collected in different locations and analyzed for various ions, viz., Na+, Ca2+, Mg2+, K+, Cl−, HCO3−, SO42−, CO32−, HCO3−, NO3− and F− to assess the water chemistry with sodium absorption ratio, %Na, residual sodium carbonate, magnesium hazard.

Groundwater quality deterioration due to anthropogenic activities has become a subject of prime concern. The objective of the study was to assess the spatial and temporal variations in groundwater quality and to identify the sources in the western half of the Bengaluru city using multivariate statistical techniques. Water quality index rating was calculated for pre and post monsoon seasons to quantify overall water quality for human consumption. The post-monsoon samples show signs of poor quality in drinking purpose compared to pre-monsoon.

Judgement of the National Green Tribunal (Central Zonal Bench, Bhopal) in the matter of Prasoon Kumar Vs Chhattisgarh Environment Conservation Board & Others dated 28/11/2017 regarding the closure directions issued by the closure directions issued by Chhattisgarh Environment Conservation Board against the chemical industry of Prasoon Kumar under Section 33 (A) of Water (Prevention and Control of Pollution) Act, 1974.

The Ministry of Water Resources, Govt. of India, therefore, constituted a committee consisting of experts in the field of ground water to recommend a revised methodology. This report is the final outcome of the recommendations of the Committee.

GURUGRAM: The city's groundwater quality has severely deteriorated over the past year.

Under the loom of extreme climatic perturbations, human expansion and rising demand, world’s freshwater reserves are expected to suffer severe setbacks in the coming years. A major task for the international authorities in this regard is to develop a reliable inventory of existing potable water sources and identify the challenges therein. The main objective of this study was to present a spatial summary of ‘safe’ water sources in India using the most ‘authentic’, cross-sectional, open-sourced census database for 2011 ranging from household to state level.

Question raised in Lok Sabha on Contamination of Ground Water, 09/02/2017. Ground water quality data generated by Central Ground Water Board (CGWB) during various scientific studies and ground water quality monitoring indicates that ground water in isolated pockets in parts of various States is contaminated with Fluoride, Nitrate, Arsenic, Lead, Cadmium, Chromium etc. The State-wise details of districts affected in parts with ground water contamination are given at Annexure I.