Contamination of chromium is considered a serious environmental pollutant due to wide industrilization. The two largest sources of chromium emission in the atmosphere are from the chemical manufacturing industry and combustion of natural gas, oil and coal. 2007

The temporal and spatial distribution of trace metals in the surface sediments of Chitrapuzha river were studied.

Groundwater monitoring was carried out in Tarikere taluk during December 2004. The samples were analyzed for trace metals, such as iron, cadmium, lead, copper, zinc, nickel and barium.

Ten different trace metals in Gagan river water at thirteen different sites in and around Moradabad were estimated by ICP-AES technique and the data was compared with water quality standards prescribed by WHO. River was found to be excessively contaminated for copper, iron, lead concentrations and moderately contaminated for nickel and cadmium.

This paper discussed the distribution of pesticides, polycyclic aromatic hydrocarbons (PAHs) and heavy metals in water, sediment and prawn from intensive prawn ponds (n = 8) near the Kolleru lake wetland, India and assessed the quality of prawn for human consumption and also discussed the possible effects of these pollutants on pond environment and aquatic environment.

A cross-sectional epidemiological survey of 255 individuals (130 current permanent employees, 64 contract workers, 55 ex-employees and 6 scrap dealers) coupled with a retrospective cohort study of the occupational health of 290 employees (all permanent employees who ever worked in the factory over a span of 15 years) was conducted in a mercury thermometer plant at Kodaikanal in India. 

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