Public Drinking Water Branch

The Department of Natural Resources’ Public Drinking Water Branch has the important mission of ensuring Missouri’s public water systems provide safe drinking water to every resident and visitor to the state. To do this, the branch sets limits and monitors for contaminants; issues permits for new and existing public water systems; certifies drinking water treatment and distribution operators; supports and promotes water system security; provides support for improving technical, managerial, and financial capacity and provides funding opportunities for water system improvements. Our aim is to help keep you informed of the quality of Missouri's drinking water. You’ll find current information regarding rules, laws and standards, monitoring efforts, permits and engineering, compliance and enforcement, financial assistance opportunities and more. 

Drinking Water Information

Boil Order Information

Drinking Water Grants and Loans

Other Links

Construction standards for private domestic wells are regulated by the Missouri Geological Survey. For sampling of private domestic wells, contact the Missouri Department of Health and Senior Services.