Minnesota Septic & Well Water Rules
The Minnesota Pollution Control Agency (MPCA) licenses businesses and certifies individuals that work on subsurface sewage treatment systems (SSTS).
This is a short state page. It covers only the facts we've verified from official sources so far.
Official lookups
Licensed septic professionals
- The MPCA licenses SSTS businesses and certifies individuals such as designers, installers, inspectors and pumpers. You can confirm a business's license with the MPCA's online SSTS search.
Inspection when you sell
- Property-transfer septic inspections in Minnesota are generally set by county or city ordinances, not statewide. Check your county's ordinance before buying or selling.
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Wells at sale
- Minnesota law (Minn. Stat. 103I.235) requires sellers to disclose the location and status of all known wells before signing a purchase agreement. A Well Disclosure Certificate is filed at closing when required.
Private well testing
- The Minnesota Department of Health recommends testing for total coliform bacteria and nitrate every year, and for arsenic at least once.
Frequently asked questions
How do I check if a Minnesota septic company is licensed?
Use the MPCA's SSTS business search to confirm an active license and specialty areas.
Sources
- MPCA: SSTS business licensing and individual certification
- MPCA SSTS search
- Minn. Stat. 103I.235
- MDH: Wells at Property Transfer
- MDH: Well Testing, Results, and Options
Last checked: October 21, 2026
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