Many people use to drink rainwater, even in areas where clean municipal water is available. Domestic rainwater is defined here as any water collected from building roof tops subsequent to rainfall events and stored by households for later use. Rain water may easily become contaminated on storage unless correct procedures for collection and storage are made. Rainwater may provide the best source of domestic water in areas affected by salinity, high fluoride or areas affected by pollution from various sources. Fluorides are widely distributed in nature and it is estimated to constitute about 0.32% of the earth’s crust. Water forms the most important component of eco-system therefore any imbalance either in term of its amount or presence of added impurities to it can harm the whole eco-system (Ranjana, 2009) Nearly 12 million tons of fluoride deposits on the earth’s crust are found in India. These fluoride deposits are the reason for fluorosis in 17 states of India (UNICEF, 1999). Rainwater has been found in some cases to contain bacteria, or trace metals, or both. the public to limit rainwater use to outdoor purposes, and to laundry and toilet flushing. In our study, over 12 months, rainwater samples were collected around tested for E. coli and total coliforms. Of many samples tested, more than 50% contained E. coli. The health guideline for E. coli is 0/100 mL for drinking water. A survey on household drinking water choice was undertaken across the metropolitan area. The aim was to determine drinking water choices and to understand the driving forces behind drinking potentially contaminated rainwater in a city where clean municipal water is supplied. The investigation concluded that a higher proportion of households use rainwater as their primary source of drinking water. It was found that a higher proportion of households are using domestic filtration systems to improve municipal water quality. Opposition to municipal water fluoridation was reported, drinking water preferences.
Rainwater, Storage tank, Drinking water, Household, Ground water recharge, Fluoride, Chlorination
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