What is the fluoride content of different sources of water supplies in the endemic regions of Nalgonda district of Andhra Pradesh?
There are three kinds of water sources available namely rainwater, surface water and ground water. Rainwater is clean and ideal for drinking and cooking. Since rainfall is uneven storage becomes a major problem. Large storage reservoirs are needed which are very expensive to build and maintain. Rainwater harvesting in bunds and tanks will help in keeping ground water levels higher. Surface water sources are tanks, dams, canals and rivers. The fluoride content of Nagarjunasagar reservoir and its canals is low and suitable for drinking and cooking since the fluoride content ranges between 0.4-0.5 PPM. Tank waters are usually contaminated with biological and chemical pollutants. Such water should not be used without treatment and disinfection. Fluoride content of tank water is higher than rainwater and is in the range of 1.4 PPM. Rivers are not perennial and their fluoride content varies from 1.0 PPM in Alair vagu to 7 PPM in stream near Sivannagudem. It is surprising that fluoride conten
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