Clean Water Act discharge permit · NPDES MN0020010
GRAND MARAIS WWTP, Grand Marais, MN: NPDES MN0020010 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
GRAND MARAIS WWTP, held by Grand Marais WWTP, holds NPDES permit MN0020010, which discharges to L Superior. EPA’s file records it issued October 27, 2010 and expiring September 30, 2015. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | GRAND MARAIS WWTP |
|---|---|
| Permittee as filed | Grand Marais WWTP |
| NPDES ID | MN0020010 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | October 27, 2010 |
| Expiration date | September 30, 2015 |
| Address | Grand Marais, MN 55604 |
| Receiving water | L SUPERIOR |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | City of Grand Marais-Frontal Lake Superior (HUC 040101010505) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 7Pollutants on file
- 0Under a numeric limit
- 7With a violation of any kind
- 6With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Chlorine, total residual | 0 | 73 | 73 | April 30, 1996 | 14,900% over the limit |
| Solids, total suspended | 0 | 10 | 10 | May 31, 2026 | 449% over the limit |
| Coliform, fecal MPN + membrane ftl 44.5 C | 0 | 20 | 8 | May 31, 2026 | 588% over the limit |
| Solids, suspended percent removal | 0 | 4 | 4 | April 30, 2026 | 227% over the limit |
| pH | 0 | 3 | 3 | March 31, 2026 | |
| Phosphorus, total [as P] | 0 | 11 | 2 | August 31, 1990 | 69% over the limit |
| Flow, in conduit or thru treatment plant | 0 | 52 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 13, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| September 13, 2023 | Failure of the Control Authority to maintain records for the past three years (Level II - Other) | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MN0020010.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MN0020010 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.