Well pump repair and water testing in Missouri
Missouri Department of Natural Resources, Missouri Geological Survey licenses water well contractors but publishes no list we can download. We will add Missouri businesses once the state provides one; until then this page covers Missouri's well rules and water testing.
Towns with licensed well businesses
Missouri well rules in brief
The Missouri Geological Survey's Well Installation Section (Department of Natural Resources) administers the Water Well Drillers Law and issues permits to drillers and pump installers. (Source: Missouri Geological Survey administers the law) Read the Missouri well rules.
A non-restricted pump installation contractor permit requires completing the apprenticeship program and passing a closed-book permit test with at least 70%. (Source: Apprenticeship and closed-book test) How well contractors are licensed in Missouri.
Testing your well water in Missouri
Labs and health departments in Missouri publish their own test fees. What a well water test costs in Missouri, with every fee linked to its source. Which tests fit your home.
Questions
How do I check that a well contractor is licensed in Missouri?
Missouri Department of Natural Resources, Missouri Geological Survey licenses water well contractors. It offers an online search but no public list we can download, so we will add Missouri businesses once the state provides the list. Ask any contractor for the license number and check it with the state.
Does Missouri require private well owners to test their water?
The Missouri health department offers private well testing as a public health service but not specifically for real estate deals; buyers and sellers should use a private lab. (Source: Missouri DHSS)
More: Missouri private well rules · Getting a water well or pump installer license in Missouri
Test your well water every year
The EPA says to test a private well every year for bacteria and nitrates, and no agency does it for you. Tell us when your water was last tested and we'll text you a month before the next test is due, with labs and licensed well pros near you.
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