The Missouri Department of Natural Resources (DNR) has announced the availability of the 2020 Census of Missouri Public Water Systems.

The annual Census of Missouri Public Water Systems provides detailed information regarding the volume, source water type, population, chemical characteristics and other information about Missouri’s 2,740 public water systems.

It also includes test results for selected chemicals along with the types of treatments used by Missouri water systems. This information can be useful to citizens, water system personnel, public officials, consulting engineers and regional planners who want to learn more about their public water systems.

The department prepares the census annually as required by Section 640.120 of the Revised Statutes of Missouri. The 2020 Census of Missouri Public Water Systems is available online at

For more information, visit the department's web page at or call 573-751-1300.

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