All people need clean water to drink. People can go for weeks without food but only days without water. Contaminated water can be a threat to anyone's health but especially to young children.
About half of the United States' drinking water comes from groundwater. Most is supplied through public drinking water systems. But many families rely on private, household wells and use groundwater as their source of fresh water.
About 10% of persons in the United States rely on smaller water supplies (mostly household wells) that are not regulated by EPA. Treatment and monitoring requirements for these small systems vary from state to state.
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