Rural Home Compass
← All state guides

MN homeowner guide

Minnesota: private well + septic

Minnesota combines a legally defined three-analyte new-well sample with statewide well disclosure and an official record system whose pre-1974 and sealing-record gaps matter. Current MDH materials use different routine nitrate intervals, while nitrate and PFAS decisions also change by location.

Reviewed 2026-09-13Rural Home Compass editorial desk19 official sources
Rural homeowner reviewing property system records near a capped wellhead
Use state guidance to identify the right record holders and testing programs; county, permit, and system-specific requirements still control.
Why this page is different

Minnesota-specific value comes from its three-analyte new-well rule, transparently conflicting routine nitrate guidance, legal disclosure without a statewide transfer test, local nitrate/PFAS paths, and MWI coverage limits.

Water baseline

A new potable well requires total coliform, nitrate-nitrogen, and arsenic testing; current MDH materials agree on annual coliform but give both annual and every-other-year routine nitrate guidance.

Septic baseline

Minnesota SSTS rules set statewide minimums, but counties, cities, and townships implement ordinances and can add property-transfer inspection and maintenance requirements.

Who controls

Minnesota Department of Health oversees wells and records; counties and environmental or public-health programs can provide testing services, while local governments administer SSTS ordinances under state rules.

Where records start

Search Minnesota Well Index, request filed disclosure certificates from MDH, and ask the local SSTS program for permits, compliance inspections, and local transfer rules.

Private well testing overview

Minnesota uses different testing paths for different moments.

New-well completion, routine ownership, a home purchase, and a flood or repair are not the same testing decision. Use the dedicated guide for the exact timing, required parameters, laboratory route, and county records to request.

Open the Minnesota private-well testing guide →

Septic facts that change your next step

  1. Minnesota SSTS minimum rules are implemented through county, city, and township ordinances, which may be stricter than the state floor.
  2. Some local SSTS programs require a compliance inspection before property transfer, so the property’s local jurisdiction controls that check.
  3. Compliance inspections must be performed by an MPCA-certified inspector working through a licensed inspection business or qualified local government.
Your first three actions
  1. Search MWI by unique well number and property details, then request missing older or disclosure records from MDH.
  2. Separate the required well-disclosure process from the voluntary or locally required purchase water test.
  3. Ask the local SSTS program about transfer inspections, permits, and the system management plan.
Build my home planBuild a water test panel

Official state sources

  1. Minnesota Revisor of Statutes: Minnesota Rule 4725.5650: Water quality samples from a newly constructed potable wellReviewed 2026-09-13
  2. Minnesota Department of Health: Constructing a New Water-Supply Well in MinnesotaReviewed 2026-09-13
  3. Minnesota Department of Health: Owner's Guide to WellsReviewed 2026-09-13
  4. Minnesota Department of Health: Nitrate in Well WaterReviewed 2026-09-13
  5. Minnesota Department of Health: Well Testing, Results, and OptionsReviewed 2026-09-13
  6. Minnesota Department of Health: What You Should Know About Wells at Property TransferReviewed 2026-09-13
  7. Minnesota Department of Health: Well DisclosureReviewed 2026-09-13
  8. Minnesota Department of Health: Minnesota Well Index and coverage limitsReviewed 2026-09-13
  9. Minnesota Department of Health: Arsenic in Well WaterReviewed 2026-09-13
  10. Minnesota Department of Health: Safe Drinking Water For Your BabyReviewed 2026-09-13
  11. Minnesota Department of Health: Well Tested? Well Done SE MinnesotaReviewed 2026-09-13
  12. Minnesota Department of Health: Private Well Protection Clean Water FundReviewed 2026-09-13
  13. Minnesota Department of Health: PFAS and Private WellsReviewed 2026-09-13
  14. Minnesota Department of Health: Disinfecting Flooded Private Water WellsReviewed 2026-09-13
  15. Minnesota Department of Health: Flood Precautions for Private Water WellsReviewed 2026-09-13
  16. Minnesota Department of Health: Accredited laboratories accepting private-well samplesReviewed 2026-09-13
  17. Minnesota Pollution Control Agency: Septic systems and local SSTS authorityReviewed 2026-09-13
  18. Minnesota Pollution Control Agency: Local septic system programsReviewed 2026-09-13
  19. Minnesota Pollution Control Agency: SSTS inspectionsReviewed 2026-09-13