The drinking water in United States contains more than 60,000 chemicals. 91 chemicals are allowed by the safe drinking water act in United States. But recently the drinking water in many states are found to contain many more chemicals. Even if these chemicals taken are at tiny proportion , they can lead to cancer or a stomach upset or birth defects and other serious diseases.

From 2004 the commonly used health guideline is not followed to protect the people from chemicals of water. Around 62 million Americans depend on water provided by the government. Federal regulators are now under pressure and trying to prevent the industrial solvents, rocket fuel, and other contaminants entering the water. Safe drinking water act is unchanged since 1974 only updated during 1980.