Clean Water Act discharge permit · NPDES MN0021202
MAYER WWTP, Mayer, MN: NPDES MN0021202 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
MAYER WWTP, held by MAYER, holds NPDES permit MN0021202, which discharges to Crow R S Fk. EPA’s file records it issued August 29, 2014 and expiring January 31, 2019. 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 | MAYER WWTP |
|---|---|
| Permittee as filed | MAYER |
| NPDES ID | MN0021202 |
| 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 | August 29, 2014 |
| Expiration date | January 31, 2019 |
| Address | Mayer, MN 55360 |
| Receiving water | CROW R S FK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | City of Mayer-South Fork Crow River (HUC 070102050701) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 6Pollutants on file
- 0Under a numeric limit
- 6With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| BOD, carbonaceous [5 day, 20 C] | 0 | 16 | 4 | May 31, 1995 | 440% over the limit |
| Solids, total suspended | 0 | 13 | 1 | May 31, 1994 | 8% over the limit |
| pH | 0 | 7 | 1 | June 30, 1993 | |
| Flow, in conduit or thru treatment plant | 0 | 29 | 0 | ||
| Coliform, fecal MPN + membrane ftl 44.5 C | 0 | 4 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 3 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MN0021202.
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
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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 MN0021202 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.