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EPA sets legal limits on over 90 contaminants in drinking water.The legal limit for a contaminant reflects the level that protects human health and that water systems can achieve using the best available technology. EPA rules also set water-test
Methods to Test Free Chlorine in the Field in Developing Countries. There are three main methods to test free chlorine residual in drinking water in the field in developing countries: 1) Pool test kits, 2) Color-wheel test kits, and 3) Digital
