The Water Map

Oklahoma

Oklahoma drinking water quality

Every public water system in Oklahoma we've verified. Each report covers one calendar year and shows the utility's own measured contaminant levels against federal limits.

Want the national picture? See where Oklahoma lands in our ranking of the states with the most open health-based water violations, pulled from the EPA's own records for every U.S. public water system.

961 water systems mapped in Oklahoma · showing the 800 with the most contaminant flags — explore them all on the map

Browse all 961 systems A–Z:123