Septic companies in Minnesota

Who Regulates Septic Systems in Minnesota

Sources: Minnesota Pollution Control Agency; Minnesota Office of the Revisor of Statutes. Checked 2026-09-18.

Minnesota calls them subsurface sewage treatment systems, SSTS for short, and that is the term the rules use. The Pollution Control Agency writes the rules and licenses the businesses. Your county writes the ordinance you actually live under.

Minnesota counties are required to adopt SSTS ordinances and administer programmes that comply with state rules, while cities and townships may choose to regulate, and if they do their ordinance must be as stringent opens in a new tab. A city or town must adopt the regulatory option used by the county and be at least as strict as the county ordinance opens in a new tab.

That stacking only goes one way, and it is why a neighbour's experience may not match yours. A local unit of government may adopt and enforce ordinances more restrictive than the agency's rules opens in a new tab, and the MPCA's own advice is that local requirements can be stricter than the state minimum, so always check with your local government first opens in a new tab.

One caveat on that, which matters most around the Twin Cities. Cities and townships that adopt their own ordinance run their own permitting, and in our county research we found counties that regulate only a named handful of cities and townships and leave the rest to do their own. So check whether your own city or township runs the programme before you call the county.

Licenses and What to Check Before You Hire

Sources: Minnesota Office of the Revisor of Statutes; Minnesota Pollution Control Agency. Checked 2026-09-18.

Minnesota licenses the business and certifies the person, and the licence is specific to the task. A person may not design, install, maintain, pump, inspect or provide service to an SSTS without a license issued by the commissioner opens in a new tab, and certain tasks can only be done by certified individuals opens in a new tab.

A state SSTS license applicable to the type of work being performed is required for any business doing that work opens in a new tab, and property owners that employ a business to perform this work shall hire a business that is licensed opens in a new tab. The obligation is written onto the owner, so this is your check to make, not only the contractor's.

There are six licence types, and each is defined by the work it covers. A basic design licence covers designing all system components and writing management plans for a Type I, II or III system opens in a new tab, while an advanced design licence adds conducting site and soil evaluations opens in a new tab. Designing and digging are two different licences.

An installation licence covers constructing, installing, altering, extending, maintaining or repairing systems according to an approved design opens in a new tab. A basic inspection licence covers compliance inspections and issuing certificates of compliance and notices of noncompliance opens in a new tab, which is the licence that matters at a sale.

Pumping and servicing split as well. A maintenance licence covers measuring scum and sludge depths and removing those deposits opens in a new tab, while a service provider licence covers measuring those depths and identifying problems with tanks, baffles, effluent screens and maintenance hole covers opens in a new tab. Designers and inspectors complete 18 hours of continuing education every three years, at least six of them in soils opens in a new tab.

One practical point before you narrow your search. Licensed businesses may work anywhere in Minnesota and are not restricted to the city or county in which they are located opens in a new tab. We hold no Minnesota register of our own, so no listing here carries a verified credential for this state, and the MPCA's licensed business search is where a claim gets checked.

Permits, Inspections and Selling a Home

Sources: Minnesota Office of the Revisor of Statutes; Minnesota Pollution Control Agency. Checked 2026-09-18.

The local unit of government must review and either approve or deny the application before issuing a construction permit, and construction must not be initiated until the permit is granted opens in a new tab. A minimum of three soil observations are required for the initial and replacement soil treatment area, with at least one in the part of that area where the system is expected to go opens in a new tab.

The document that follows an inspection has two possible names, and the second one starts a clock. A system in compliance must be issued a certificate of compliance, and a system found not in compliance must be issued a notice of noncompliance opens in a new tab. A system that is not protective of groundwater is considered a system failing to protect groundwater opens in a new tab.

The timeframe for an imminent threat to public health or safety is 10 months maximum under state law, though local ordinances may set shorter ones, and the timeframe for upgrading a system failing to protect groundwater is set by local ordinance opens in a new tab. So how long you have to fix it depends on which finding you got.

Selling is where the local layer decides everything. Minnesota state regulations do not require a compliance inspection before a property is sold or transferred, but many county, city or township ordinances do, especially in shoreland areas opens in a new tab. What state law does require is disclosure: before signing an agreement to sell or transfer, the seller must disclose in writing how sewage generated at the property is managed opens in a new tab.

Keeping a System Working

Sources: Minnesota Pollution Control Agency; Minnesota Office of the Revisor of Statutes; U.S. Environmental Protection Agency. Checked 2026-09-18.

Minnesota rules require that the system be assessed at least once every three years, and local ordinances may be more stringent or add requirements opens in a new tab, which lines up with the EPA's three year interval opens in a new tab. The state also gives the pumping trigger as a measurement: all solids and liquids must be removed from any tank or compartment where the top of the sludge layer is less than 12 inches from the bottom of the outlet baffle or transfer hole opens in a new tab.

Help Paying for Repairs

Sources: Minnesota Department of Agriculture; Minnesota Pollution Control Agency. Checked 2026-09-18.

Minnesota has a loan programme that names septic work as eligible, which is rarer than it should be. The AgBMP Loan Program provides low interest loans to farmers, rural landowners and agriculture supply businesses opens in a new tab, and private and cluster septic system installations, upgrades or repairs within Minnesota are eligible for AgBMP funding opens in a new tab.

The other state route funds the local authority rather than the household. The Clean Water Partnership offers low interest loans to local units of government for nonpoint source best management practices and restoration work opens in a new tab, and the maximum loan award for a project is $750,000, with the potential to increase by $500,000 opens in a new tab.

Find Your County SSTS Office

Minnesota counties are required to run an SSTS programme, so the permit and the compliance inspection usually come from the county. Not one of these offices calls itself a health department: environmental services, planning and zoning, land and resource management and inspections all appear below. Each entry is the office for that county. Checked 2026-09-18.

Questions People Ask