Septic pumping in Ontonagon County, Michigan costs $250-$500 (avg $350). A new septic system installation costs $5,050-$10,100. USDA soil data rates 0.2% of county soils as suitable for septic absorption fields. Approximately 782 homes in this county use septic systems.
Septic System Costs in Ontonagon County
| Service | Low | Average | High |
|---|---|---|---|
| Pumping / Cleaning | $250 | $350 | $500 |
| Routine Inspection | $200 | $250 | $350 |
| Real Estate Inspection | $350 | $500 | $700 |
| Minor Repair | $650 | $900 | $4,400 |
| Conventional Installation | $5,050 | $7,200 | $10,100 |
| Aerobic System Installation | $9,450 | $13,500 | $18,900 |
| Drainfield Replacement | $5,050 | $7,200 | $10,100 |
| Perc Test | $750 | $1,100 | $1,550 |
Cost estimates based on regional market data for Ontonagon County, Michigan. Actual costs depend on system type, site conditions, and provider.
Soil & Septic Suitability in Ontonagon County
Drainage Class
Moderately well drained
Hydrologic Group
A
Unique Soil Types
129
Avg Bedrock Depth
2 ft
Dominant Soil Types
| Soil Series | Coverage | Drainage | Hydro Group |
|---|---|---|---|
| Gogebic | 2184 | Moderately well drained | D |
| Karlin | 1173 | Somewhat excessively drained | A |
| Stutts | 1059 | Somewhat excessively drained | A |
| Kalkaska | 1057 | Somewhat excessively drained | A |
| Vilas | 1000 | Excessively drained | A |
Septic Tank Absorption Field Suitability
USDA NRCS rates soil suitability for septic absorption fields across this county:
Overall rating: Very limited
Septic Regulations & Permits in Ontonagon County
State Regulatory Body
Michigan EGLE
Inspection Required for Home Sale
No / Varies
Nitrogen Reduction Areas
No
Advanced Treatment Required
In designated areas
County health departments regulate. Point-of-sale inspection in some counties.
Contact the Ontonagon County health department for current permit requirements, fees, and approved system types.
Septic System FAQ for Ontonagon County
How much does septic pumping cost in Ontonagon County?
Septic pumping in Ontonagon County, Michigan typically costs between $250 and $500, with an average of $350. Costs vary by tank size (1,000-1,500 gallons is typical), ease of access, distance from the pumping company, and how full the tank is. Most homeowners should pump their tank every 3-5 years.
How much does a new septic system cost in Ontonagon County?
A conventional septic system installation in Ontonagon County typically costs $5,050-$10,100. An aerobic treatment unit (ATU) costs $9,450-$18,900. Given the predominantly moderately well drained soils in this area, some sites may require alternative system types. Costs include the tank, drainfield, permits, and labor.
Do I need a permit for a septic system in Ontonagon County?
Yes. Virtually all counties in Michigan require a permit before installing, repairing, or replacing a septic system. The permit process typically involves a soil evaluation or percolation test, system design by a licensed professional, application to the county health department, and one or more inspections during installation. Contact the Ontonagon County health department for current requirements and fees.
What soil types are in Ontonagon County and how do they affect septic systems?
Ontonagon County has predominantly Gogebic, Karlin, Stutts soils. The dominant drainage class is Moderately well drained with hydrologic group A. The USDA rates 0.2% of surveyed soils as "Not Limited" for septic absorption fields, 2.2% as "Somewhat Limited", and 97.7% as "Very Limited".
How often should I pump my septic tank in Ontonagon County?
The EPA recommends pumping your septic tank every 3-5 years for a typical household. The exact frequency depends on tank size, household size, and water usage. A 1,000-gallon tank serving a family of 4 should generally be pumped every 3 years. Some counties in Michigan have mandatory pumping schedules — check with your local health department.
Can I install a conventional septic system in Ontonagon County?
It depends on your specific site. USDA soil data shows that 97.7% of soils in Ontonagon County are rated "Very Limited" for septic absorption fields, while only 0.2% are "Not Limited." This means many properties will require alternative systems such as mound systems, pressure distribution systems, or aerobic treatment units. A percolation test ($750-$1550) and soil evaluation are required before the county will approve a system design.
How long does a septic system last in Ontonagon County?
A well-maintained septic system in Ontonagon County typically lasts 25-30 years, though some components may need attention sooner. The concrete septic tank itself can last 40+ years, while the drainfield — the most critical and expensive component — usually lasts 15-25 years depending on soil conditions (Ontonagon County has predominantly moderately well drained soils). Regular pumping every 3-5 years and avoiding excess water usage are the two most effective ways to extend system life.
Data last updated: 2026-04-13