The Department of Natural Resources and public drinking water systems issue various annual reports about the state of Missouri's drinking water. These reports summarize the results of testing completed the previous year and provide an overview of the department's drinking water oversight in monitoring and protecting drinking water.

Drinking Water Annual Compliance Report
MoDNR submits this report to EPA to document public water system violations
Consumer Confidence Reports CCR
Community water supplies provide an annual drinking water summary to their customers
Census of Missouri Public Water Systems
Annual report about volume, source water type, population and other characteristics
Chronic Violators
Drinking water systems that have chronically failed to do required bacteriological testing