Septic inspection when selling a house in Michigan
0 statewide rules and 11 local rules from official sources.
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.
Local rules in Michigan (11)
| Where | What | When | Rule set by |
|---|---|---|---|
| Benzie and Leelanau counties | Septic system and well | before the sale or transfer | Benzie-Leelanau District Health Department |
| Elk Rapids Township | Septic system and well | owner shall not transfer until STDS evaluated, HDNW finds compliance, and report given… | Elk Rapids Township (Antrim County) |
| Grand Traverse County | Septic system and well | before the sale, transfer or conveyance | Grand Traverse County Health Department |
| Ingham County | Septic system and well | prior to closing | Ingham County Health Department (Point of Sale Regulation) |
| Isabella County and Secord Township | Septic system and well | before the transfer; CMDHD must issue an authorization for transfer | Central Michigan District Health Department |
| Macomb County | Septic system and well | evaluation report submitted to the Health Department at least five days before closing | Macomb County Health Department |
| Milton Township | Septic system and well | owner shall not transfer until STDS evaluated, HDNW finds compliance, and report given… | Milton Township (Antrim County) |
| Ottawa County | Septic system and well | evaluation obtained first; results given to the purchaser at the time of closing | Ottawa County Department of Public Health (Real Estate Transfer Evaluation Program) |
| Torch Lake Township | Septic system and well | owner shall not transfer until STDS evaluated, HDNW finds compliance, and report given… | Torch Lake Township (Antrim County) |
| Village of Elk Rapids | Septic system and well | Property cannot be legally sold or transferred until the Time-of-Transfer Evaluation is… | Village of Elk Rapids (Antrim County) |
| Washtenaw County | Septic system and well | before the sale, transfer or conveyance; Division must authorize it | Washtenaw County Health Department (Time of Sale Program) |
When the local rules started
4 local rules in Michigan state a start date in the official text we read; the other 7 do not.
- 1984 Ottawa County (1984)
- 2006 Ingham County (2006)
- 2024 Elk Rapids Township (April 1, 2024)
- 2026 Grand Traverse County (January 1, 2026)
Published costs in Michigan
Fee items from official fee schedules and guides, with the year each applies to. They are different items (acceptance fees, inspections, escrow), so we list them rather than average them.
| Jurisdiction | Item | Amount | Year | Source |
|---|---|---|---|---|
| Benzie-Leelanau DHD | Sewage evaluation (time of transfer) | $300 | FY2027 | bldhd.org |
| Benzie-Leelanau DHD | Well evaluation incl. coliform and nitrate | $250 | FY2027 | bldhd.org |
| Elk Rapids Township / HDNW | Real estate transfer evaluation incl. water analysis | $378 | 2026 | nwhealth.org |
| Grand Traverse County | County time-of-transfer review, well and septic | $300 (septic only $200, well only $200), on top of evaluator fee | 2026 | gtcountymi.gov |
| Ottawa County | Real estate transfer evaluation, sewage + water | $412 (sewage only $306) | 2026 | web.archive.org |
Private wells in Michigan
About 2,597,314 of Michigan’s 9,922,576 residents (26%) got their drinking water from a private well in 2015, by the USGS estimate. The 9 counties with a whole-county rule listed here hold about 312,602 of them (12%); the largest by well users: Ottawa County (74,986), Washtenaw County (66,798), Grand Traverse County (50,173).
Source: USGS county water use 2015 (Dieter et al., 2018); 83 counties in the USGS table.
Where private wells (and usually septic systems) are most common
Michigan ranks 2 of 45 states and territories by people on private wells (USGS 2015). In 44 of its 83 counties more than half of residents drink from a private well; homes there usually also treat wastewater on site, so a septic check and a well test tend to come up together at sale. The highest shares:
- Alcona County: 94% of 10,349 residents on a private well
- Roscommon County: 92% of 23,898 residents on a private well
- Lake County: 90% of 11,424 residents on a private well
- Missaukee County: 89% of 14,903 residents on a private well
- Oscoda County: 89% of 8,251 residents on a private well
- Montmorency County: 88% of 9,259 residents on a private well
- Kalkaska County: 88% of 17,260 residents on a private well
- Ogemaw County: 87% of 20,937 residents on a private well
USGS county water use 2015 (Dieter et al., 2018). The USGS table counts well users, not septic systems; no national county count of septic systems exists.
Soils for septic drain fields in Michigan
Across the 78 counties with USDA soil survey data, 96% of rated land is “very limited” for a conventional septic drain field. Most limited: Midland County (100%), Shiawassee County (100%), Gladwin County (100%). Least limited: Wayne County (77%), Menominee County (78%), Dickinson County (79%).
Source: USDA NRCS Soil Survey Geographic Database (SSURGO), via Soil Data Access, rating “ENG - Septic Tank Absorption Fields”, read November 15, 2026. County-wide ratings, not a test of one lot.
How the neighbouring states compare
Michigan has 11 local rules. Of its 3 neighbouring states, 0 have a statewide rule at sale; a buyer moving across the line may meet a different rule. From our register of official rules:
- Indiana: no statewide rule; 1 local rule (counties, cities or townships).
- Ohio: no statewide rule; 5 local rules (counties, cities or townships).
- Wisconsin: state law bars local point-of-sale rules.
Well water test: 6 labs on the Michigan certified drinking-water list (EGLE - State of Michigan Certified Laboratories: Chemistry + EGLE - State of Michigan Certified Laboratories: Microbiological + EGLE - State of Michigan Certified Laboratories: Lead and Copper + EGLE - Certified Radiological Laboratories + EGLE - In-State Certified PFAS Laboratories, SOM Certified Labs - Chemistry 3/11/2026 (chemistry, microbiological, lead and copper lists); 9/8/2025 (radiological, in-state PFAS lists)) are marked as taking samples from homeowners or outside clients and certified for coliform bacteria. See certified well-water labs and testing advice in Michigan.
Other states: all states.