Official sources checked August 30, 2026

Dakota County, Minnesota septic permits and requirements

Minnesota state and local framework

The Minnesota Pollution Control Agency states that counties must adopt SSTS ordinances and administer programs meeting state rules. Cities and townships may also regulate septic systems, and when they do their ordinances must be at least as stringent as the county ordinance. Local programs review plans, approve permits, inspect systems, and may impose requirements stricter than statewide minimums.

Permitting authority is split between Dakota County and local municipalities

Dakota County directly regulates septic systems in the cities of Hastings, Randolph, and New Trier; Randolph and Waterford townships; and shoreland/floodplain areas or unincorporated portions of the county. The county states that most other cities and townships administer their own septic permitting, inspections, and enforcement.

County Ordinance 113 can be stricter than the Minnesota minimums

Dakota County states that County Ordinance 113 and Minnesota Rule Chapter 7080 establish septic standards and that the county maintains a list of ordinance provisions more restrictive than state rules. Applicants should check both the applicable local program and the county ordinance rather than assuming the state minimum is sufficient.

Septic work must be performed by a licensed septic professional

Dakota County states that work on a septic system must be done by a licensed septic professional and directs property owners to the Minnesota Pollution Control Agency license list for designers, installers, inspectors, and pumpers/maintainers.

A bedroom addition requires a compliance inspection

Dakota County requires a compliance inspection before a bedroom is added to a home. The inspector must determine whether the septic tank and soil absorption system are large enough for the proposed additional bedroom.

Compliance reports go to the local authority with jurisdiction

Dakota County directs compliance inspectors to submit completed reports to the municipality or other local program that has septic-system jurisdiction for the property. This is important in Dakota County because the permit authority changes by city, township, and special county-jurisdiction areas.

Official sources

• Minnesota Pollution Control Agency — Local Septic System Programs
• Dakota County — Septic Systems

SepticScope summarizes public-agency information for planning purposes. The permitting agency's current instructions control if they differ from this guide.