Drain field in Macomb County: what to know
A new Macomb drain field starts with a soil evaluation: an online application, a fee of $243 on the 2026 schedule, a site plan, a MISS DIG ticket and a backhoe that the applicant supplies, with an appointment usually within three to seven business days. The permit application follows, with a parcel ID, a legal description or survey and a professionally prepared site plan, at $489 for a new septic permit and $150 for a repair.
For isolation distances and inspection steps, the state Criteria's minimums are the only numbers we can state: 4 feet to high groundwater, a 45-minutes-per-inch percolation rate, 10 feet to property lines and 15 feet to foundations. Systems under 10,000 gallons a day are handled by the county, and larger ones also need a state permit.
Permits for drain field in Macomb County
The county health department issues the permit and inspects before the trench is covered.
Macomb County Health Department, Environmental Health Services Division, Mount Clemens. Soil evaluation first (online application, site plan, MISS DIG ticket, backhoe from the applicant), then the septic permit application with parcel ID, legal description and a professionally prepared site plan. The Macomb County septic rules
Macomb County septic fees
| Item | Amount | Note |
|---|---|---|
| Soil evaluation | $243 | 2026 schedule |
| New septic permit | $489 | 2026 schedule |
| Repair permit | $150 | 2026 schedule |
| Health department transfer evaluation | $384 | Excludes pumping |
| Evaluator registration | $220 | Registered evaluators set their own fees |
When a drain field problem cannot wait
- Sewage is surfacing in the yard or backing up inside.
- The field is wet and foul after a flood: keep people and vehicles off it.
- A bright green strip over the field with no surfacing or backup: book an inspection soon.
- A tree near the field: plan its removal, because EGLE links roots to failure.
Before you call
Schedule the soil evaluation before you hire an excavator for anything else.
- Keep vehicles and heavy items off the field and mark its edges.
- Point downspouts and sump discharge away from it, and fix leaking fixtures.
- Note where the wet spot is, when it appears and whether it follows rain.
- Ask the county for the as-built drawing, which shows where the field lies.
What drain field costs
The estimate below is the Michigan-wide one and not a Macomb County price. The same table is on the drain field page. How we estimate costs. Prices as of Oct 19, 2026.
| Item | Figure | What it is |
|---|---|---|
| Estimated range, not a quote | $890 to $6,025 per repair | Built from one national published range, adjusted by the Michigan operating engineer median wage ratio (1.05). No Michigan septic company published a range we could count. |
| Estimated range for a full drain field replacement, not a quote | $2,675 to $18,100 per replacement | Built from one national published range, adjusted by the Michigan operating engineer median wage ratio (1.05). No Michigan septic company published a range we could count. |
| Septic tank servicer wage, Michigan mean | $24.85 an hour | What Michigan septic tank servicers are paid (BLS, May 2025, statewide), not what you are charged. |
| Repair or replace a malfunctioning conventional system (U.S. EPA) | $5,000 to $15,000 | EPA's national range, undated. Alternative systems cost more, and EPA gives no figure for them. |
| Replacement septic system (Michigan EGLE) | $8,000 to $30,000 | From EGLE's July 2025 news release on septic loans. EGLE gives no source or date for the range. |
How we estimate costs: the Estimated range row is a model, not a quote. It takes one published national range for this job (a cost guide from a third-party site that we have not verified and do not cite) and multiplies it by Michigan's operating engineer median wage ratio to the US (1.05, BLS 2025 data). No permit or evaluation fee is added: the county rows are shown as the schedules print them. The wage and fee rows are what workers are paid and what a county charges, and neither is a price you will be quoted. We have not collected Michigan septic quotes, and one company's published pumping price is not a range. Your tank, soil and site move a real quote outside any range, so get written quotes. Full method.
Questions about drain field
What causes a septic drain field to fail?
Solids, roots, excess water and age, according to EGLE and EPA. EGLE calls root intrusion one of the leading causes of failure in Michigan, and EPA says a field over 25 to 30 years old can develop a thickened biomat.
Can a drain field be repaired?
Sometimes, but significant root intrusion or a clogged field can require replacing the field. Both EGLE and EPA say so. A county permit comes first.
How far must a drain field be from a well in Michigan?
The state well code sets 50 feet for a single-family well, and some county codes require more. Genesee County requires 200 feet to Type I and IIa wells, and Saginaw County requires 100 feet to a shallow well.