Michigan NPDES permit search
Status, expiry and violations for 335 municipal wastewater permits · issued by EGLE
In short
How do I look up an NPDES permit in Michigan?
Search this page by permit number or plant name for a municipal plant’s permit status, expiry date and violations. For the official file, search the MiEnviro Portal or MiEnviro’s public notice search. EPA’s ECHO database shows the monitoring results and violations of every permit. The 499 industrial permits in Michigan are listed in Klarifi with a free account.
Links to official sources checked September 2026.
Effective
162
Administratively continued
171
Expired
2
Plants with effluent violations, 3 years
218
Where to find official Michigan NPDES records
Michigan Department of Environment, Great Lakes, and Energy (EGLE) runs the NPDES program in Michigan under authorization from EPA Region 5. It issues and enforces the permits and keeps the official file: applications, permits, fact sheets and monitoring reports. EGLE website ↗
permits · permit documents · applications · inspections · violations · enforcement
EGLE’s successor to MiWaters. In Site Map Explorer, search the facility or company name (or an address or site number under Advanced Search), select the site and open Environmental Interests for its permits and Documents for its files; the compliance tab shows violations since October 2015 and enforcement.
permit documents · applications
Filter Program Area to “WRD - NPDES”, or type the permit number under Reference Numbers, to find draft permits on public notice.
permits · DMRs · inspections · violations · enforcement
EPA’s Enforcement and Compliance History Online. Search water facilities by permit number, name or city; the Detailed Facility Report lists inspections, violations and enforcement actions, and Effluent Charts plot monitoring results against the permit limits.
- Permit numbers
- Individual permits follow EPA’s format (MI0058209), and MiEnviro adds a version such as “v5.0”. General permits and the coverages under them are MIG plus six digits (MIG580079).
- Discharge monitoring reports
- Through the MiEnviro Portal.
Industrial and commercial NPDES permits in Michigan
Most NPDES permits are not held by municipal plants. EPA’s permit database lists 499 individual permits in force for industrial and commercial facilities in Michigan (manufacturers, food processors, mines, power plants, landfills), 94 of them major dischargers, plus 1,547 facilities covered by a general permit, mostly for stormwater. 159 of the individual permits recorded at least one effluent violation in the last three years.
| Facility | Permit | Status | Expires | Effluent violations |
|---|
Unlock 499 industrial permits in Michigan
Search every industrial and commercial discharger in Michigan by name or permit number, with permit status, expiry and violation history. Free with a Klarifi account.
Industrial and commercial NPDES permits in Michigan: permits in force (effective or administratively continued) held by facilities EPA does not class as publicly owned treatment works or federal facilities. Source: EPA ICIS-NPDES via Klarifi, October 2026.
Violations at Michigan wastewater plants
218 of the 335 municipal plants on this page recorded at least one effluent violation, a monitored value above a permit limit, in the last three years, and 261 had a violation of any kind, including late or missing monitoring reports. Each plant’s page shows its own count. EPA’s enforcement records list 45 formal cases naming Michigan wastewater plants, 3 of them since fiscal year 2020, with $1 million in penalties assessed. Enforcement cases in Michigan →
Permit renewals by year
An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.
Largest permit holders in Michigan
| Facility | City | Avg flow (MGD) | Design (MGD) | NPDES permit | Status | Expires | Violations (3y) |
|---|---|---|---|---|---|---|---|
| GLWA Water Resource Recovery Facility | Detroit | 416.18 | — | MI0022802 | Effective | Oct 2027 | 37 |
| City Of Grand Rapids Wastewater Treatment Plant | Grand Rapids | 42.18 | — | MI0026069 | Effective | Oct 2029 | 8 |
| City Of Saginaw Wastewater Treatment Plant | Saginaw | 34.99 | — | MI0025577 | Effective | Oct 2029 | 21 |
| Southgate-Wyandotte Cso Rtf | Wyandotte | 34.9 | — | MI0036072 | Administratively continued | Oct 2026 | 2 |
| Wyandotte Wastewater Plant | Wyandotte | 33.91 | — | MI0021156 | Administratively continued | Oct 2021 | 5 |
| Anthony Ragnone Wastewater Treatment Plant | Montrose | 32.01 | — | MI0022977 | Administratively continued | Oct 2023 | 3 |
| Kalamazoo Water Reclamation Plant | Kalamazoo | 27.05 | — | MI0023299 | Effective | Oct 2030 | 37 |
| Milk River Cso Rtb | Grosse Pointe Woods | 26.28 | — | MI0025500 | Administratively continued | Oct 2026 | 46 |
| Ycua Regional Wastewater Treatment Plant | Ypsilanti | 23.69 | — | MIL042676 | Effective | Dec 2030 | 5 |
| City Of Wyoming Clean Water Plant | Grandville | 16.16 | — | MI0024392 | Effective | Oct 2030 | 74 |
Michigan NPDES permits: questions
NPDES permit search in other states
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 12, 2026.
Wastewater terms: NPDES permit · POTW · Significant industrial user · MGD · Equalization tank · Centrate · all terms