Septic System Regulations in Minnesota

In Minnesota, onsite wastewater (septic) systems are regulated by Minnesota Pollution Control Agency (MPCA) — Subsurface Sewage Treatment Systems (SSTS) Program, which sets the statewide code, and permits are issued and inspections carried out by county or local health jurisdictions. Installing, replacing or repairing a septic system here means, in sequence: a site and soil evaluation, a design, a permit application, an inspection while the system is open, and a final as-built record once it is approved.

Who regulates septic systems in Minnesota

The state-level regulator is Minnesota Pollution Control Agency (MPCA) — Subsurface Sewage Treatment Systems (SSTS) Program (official program page). MPCA sets the statewide rules governing how septic (SSTS) systems must be designed, installed, and managed, while implementation and enforcement — permitting, inspections, and local ordinances — are carried out by local units of government (counties, cities, and townships) under those state rules.

The statewide onsite-wastewater code is cited as Minnesota Rules Chapter 7080 (individual SSTS), Chapter 7081 (midsized SSTS), Chapter 7082 (local program administration), and Chapter 7083 (certification, licensing, product registration); statutory authority at Minn. Stat. 115.55, 115.551, and 115.56. We link the agency's own page above rather than restating specific numeric requirements from it, since those change by rule revision and by local amendment.

The permit sequence

The order of operations is broadly consistent across the country, even though the specific numbers in each step vary by state and often by county. None of the figures below are specific to Minnesota; treat this as the shape of the process, and get the actual numbers from the agency linked above or from the county office.

1. Site and soil evaluation. A qualified evaluator (see licensing below) digs test pits or runs a percolation test, and records the soil profile, depth to seasonal water table, depth to any restrictive layer, and slope. This determines whether the lot can support a conventional system or needs an alternative design.
2. Design. Under most state codes, daily design flow is set from bedroom count, not square footage. That flow drives tank capacity, and the soil evaluation sets the drainfield application rate and therefore its size. The designer also lays out setbacks to wells, property lines, surface water, foundations and a reserve/replacement area.
3. Permit application. Submitted to whichever office issues permits here (state agency or county/district health office, per the delegation model above), along with the design and soil work.
4. Installation and open inspection. The installer builds the system, and it is inspected before backfill while it is still open to view.
5. As-built and approval. A final drawing of what was actually built is filed once the system is approved. That as-built is the document a future owner, pumper or inspector needs, and it is what ends up in the county record.

Who can design and install a septic system

Getting septic records in Minnesota

Records requests in Minnesota are governed by the Minnesota Government Data Practices Act.

Fees: reasonable cost for copies; MGDPA sets no statutory per-page rate

Counties in Minnesota we hold records for

We hold 14,703 septic records across 37 of 87 Minnesota counties. Each county page below shows exactly where its records are kept and how many we hold.

Full Minnesota county-by-county index · Open the parcel map

Common questions

Who regulates septic systems in Minnesota?

Minnesota Pollution Control Agency (MPCA) — Subsurface Sewage Treatment Systems (SSTS) Program. MPCA sets the statewide rules governing how septic (SSTS) systems must be designed, installed, and managed, while implementation and enforcement — permitting, inspections, and local ordinances — are carried out by local units of government (counties, cities, and townships) under those state rules.

What is the septic permit process in Minnesota?

The sequence is a site and soil evaluation, a design sized from the evaluation and (under most state codes) bedroom count, a permit application, an inspection before backfill, and a final as-built filed once the system is approved. Exact numeric requirements are set by the agency's own code, not restated here.

Who can install a septic system in Minnesota?

MPCA-certified SSTS Installer (Minn. R. ch. 7083); licensed SSTS businesses must employ at least one certified Designated Certified Individual per specialty they perform (design, install, maintain, inspect), obtained via MPCA training, exam, and mentored field experience, with continuing education for renewal. https://www.pca.state.mn.us/business-with-us/ssts-individual-certification

How do I get septic records for a property in Minnesota?

Records requests are governed by the Minnesota Government Data Practices Act. Records themselves are generally filed at the county or district office that issued the permit, not the state agency; see the county's page for that county's specific portal or contact.

Regulatory information on this page was researched against official state agency sources and last verified 2026-08-31. It is informational only: the agency linked above is authoritative, and requirements can change. We are not lawyers, not a government body, and not affiliated with, licensed or certified by any agency named on this page.