Grant County, Minnesota: septic system inspection at sale
Checked on November 9, 2026 against the official rule. Rule set by Grant County.
General information, not legal advice. This is our summary of the official rule as we read it. The ordinance or code and the health department decide: confirm with them before you list, sign or close.
The rule
Shoreland district only: property in the shoreland district with a dwelling.
| Question | What the official text says |
|---|---|
| What is required | For SHORELAND-district property with a dwelling: sale only if the parties have a current Certificate of Compliance, a winter agreement, or a seller-provided inspection at or before closing; purchase agreement must say who is responsible for septic compliance and a copy goes to the Department Source: grantcountymn.gov |
| Triggered by | transfer or sale of shoreland-district property on which a dwelling is located Source: grantcountymn.gov |
| Deadline | at or before closing (winter agreement Nov 1-Apr 30, information due by June 1 next year) Source: grantcountymn.gov |
| Who arranges it | seller provides inspection; purchase agreement specifies who is responsible for compliance Source: grantcountymn.gov |
| How long a report is valid | existing-system certificate 3 years; new/replacement 5 years Source: grantcountymn.gov |
| Exemptions |
Source: grantcountymn.gov |
| Who may inspect | Minnesota Pollution Control Agency (MPCA) licensing of SSTS businesses. official list (webapp.pca.state.mn.us) Source: webapp.pca.state.mn.us |
| In force since | Sanitation Code dated 2014-06-03 (version read; county lists it as current) Source: grantcountymn.gov |
This is our summary of the official rule as we read it. The ordinance or code and the health department decide: confirm with them before you list, sign or close. Rule set by: Grant County.
Checked on November 9, 2026: read on the official site.
Septic systems in Grant County: the state’s count
MPCA counts 3,116 septic systems (SSTS) in Grant County in 2025, the 52nd highest number of Minnesota’s 87 counties. Licensed inspectors and the county did 45 compliance inspections of existing systems that year: 1.4% of the county’s systems, against 2.11% statewide (the 51st highest share). The county issued 40 construction permits in 2025 and 791 from 2002 to 2025. MPCA’s table marks the county as requiring a compliance inspection at property transfer, which matches the rule on this page.
Source: MPCA, 2025 Subsurface Sewage Treatment Systems Annual Report (April 2026), Appendix A, as reported by each county; ranks among the 87 counties in the table (1 = highest). MPCA counts all compliance inspections of existing systems, whatever the trigger (property transfer, building permit and others).
Private wells in Grant County
In 2015 about 2,513 of Grant County’s 5,903 residents (43%) got their drinking water from a private well, by the USGS estimate. That is the 31st highest share of the 87 Minnesota counties in the USGS table, and the 77th highest number of private-well users.
As we read it, this rule covers the septic system, not the well.
Source: USGS county water use 2015 (Dieter et al., 2018). Ranks count the Minnesota counties in the USGS table (1 = highest).
Soils and septic systems here
USDA soil surveys rate 95% of Grant County’s rated land “very limited” for a conventional septic drain field, 5% “somewhat limited” and 0% “not limited”, the 53rd highest “very limited” share of 85 Minnesota counties with survey data. The most common limits: slow percolation (dense or clay soil) on 93%; a high water table (saturated soil near the surface) on 91%; ponding on 27%.
Where soils are limited, inspections more often find drain fields that sit in seasonally wet soil, and replacement systems are often mounds or other engineered designs. A county-wide rating, not a test of one lot: a site evaluation decides. Source: USDA NRCS Soil Survey Geographic Database (SSURGO), via Soil Data Access, rating “ENG - Septic Tank Absorption Fields”, read November 15, 2026.
Certified labs nearest to Grant County for a well water test
Labs on the Minnesota certified drinking-water list that the list marks as taking samples from homeowners or outside clients, certified for coliform bacteria, nearest first. All of them are outside Grant County.
| Lab | Town | Distance | Certified on the list for |
|---|---|---|---|
| RMB Environmental Laboratories, Inc. – Detroit Lakes | Detroit Lakes, MN | 60 miles | coliform bacteria, nitrate, arsenic |
| Traut Water Analysis Lab | St. Joseph, MN | 87 miles | coliform bacteria, nitrate, arsenic (subcontracted) |
| A.W. Research Laboratories, Inc. | Brainerd, MN | 91 miles | coliform bacteria, nitrate, arsenic |
Source: MDH Accredited Labs in Minnesota Accepting Drinking Water Samples from Private Well Users (October 2026; read November 15, 2026). Straight-line distance from the centre of Grant County (the average of its Census ZIP-area points); “approx.” = lab placed at its ZIP centre. Call the lab first: lists do not say which household tests each lab takes or what it charges.
Nearest other sale-time rules
Buying or selling near a county line? These are the closest other local rules in our census to Grant County.
| Rule | State | Distance | Covers | Checked |
|---|---|---|---|---|
| Traverse County | Minnesota | about 21 miles | Septic system | November 9, 2026 |
| Douglas County | Minnesota | about 27 miles | Septic system | November 9, 2026 |
| Wilkin County | Minnesota | about 34 miles | Septic system | November 9, 2026 |
| Pope County | Minnesota | about 34 miles | Septic system | November 9, 2026 |
| Otter Tail County | Minnesota | about 36 miles | Septic system | November 9, 2026 |
Straight-line distance between county centres (the average of each county’s Census ZIP-area points). Townships, villages and health districts are placed at the centre of their county.