Social representations of drinking water: subsidies for water quality surveillance programmes

Guidelines for Drinking-water Quality

398 Nitrate and nitrite Nitrate (NO 3 ) is found naturally in the environment and is an important plant nutrient. It is present at varying concentrations in all plants and is a part of the nitrogen cycle. Nitrite (NO 2 ) is not usually present in significant concentrations except in a reducing environment, as nitrate is the more stable oxidation state. It can be formed by the microbial reductio...

Guidelines for Drinking-water Quality

IARC classified PCP in Group 2B (possibly carcinogenic to humans) on the basis of inadequate evidence of carcinogenicity in humans but sufficient evidence in e xperimental animals. There is suggestive, although inconclusive, evidence of the carcinogenicity of PCP from epidemiological studies of populations exposed to mixtures that include PCP. Conclusive evidence of carcinogenicity has been obt...

Trichloroethene in Drinking-water Background document for development of WHO Guidelines for Drinking-water Quality

Carbon Tetrachloride in Drinking-water Background document for development of WHO Guidelines for Drinking-water Quality

1,2-Dibromoethane in Drinking-water Background document for development of WHO Guidelines for Drinking-water Quality