Getting a water well or pump installer license in Missouri
A non-restricted pump installation contractor permit requires completing the apprenticeship program and passing a closed-book permit test with at least 70%.
Getting licensed in Missouri
Apprentices must pass an open-book apprentice permit test with at least 70% and work under a permitted contractor.
Driller and pump installer permits are reviewed for renewal every year.
Sources: Apprenticeship and closed-book test; Annual renewal
Who needs a license
Drillers and pump installers who charge for their work must hold a Missouri permit.
Landowners who install their own pump are exempt from the permit requirement but must still follow the rest of the well rules.
Source: Paid installers need a permit
How owners check a license
Permitted contractors and existing well records are available online through DNR.
Permit numbers should be shown on drilling equipment, and owners can ask to see a permit card or call the Well Installation Section.
Sources: Online list of permitted contractors; Check the permit
Common questions
Who licenses well pump installers in Missouri?
A non-restricted pump installation contractor permit requires completing the apprenticeship program and passing a closed-book permit test with at least 70%.