In the present study drinking water samples of different ground water sources had been analyzed for the estimation of a problematic chemical parameter nitrate. Analysis of drinking water samples of different sources in different zones in Alwar revealed that the concentration of nitrate had been recorded highest in drinking water samples of North-West Zone.

Hardness is an important water quality parameter especially when water is used for drinking purpose. Hardness of water is attributed to the presence of alkaline earth cations like calcium, magnesium, strontium and barium.