Clean Water Act discharge permit · NPDES MN0022624
AMBOY WWTP, Amboy, MN: NPDES MN0022624 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
AMBOY WWTP, held by AMBOY, holds NPDES permit MN0022624, which discharges to Maple R Via Jd 49. EPA’s file records it issued January 30, 2013 and expiring December 31, 2017. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | AMBOY WWTP |
|---|---|
| Permittee as filed | AMBOY |
| NPDES ID | MN0022624 |
| 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 | January 30, 2013 |
| Expiration date | December 31, 2017 |
| Address | Amboy, MN 56010 |
| Receiving water | MAPLE R VIA JD 49 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Judicial Ditch No 49 (HUC 070200110508) |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 10Pollutants on file
- 0Under a numeric limit
- 10With a violation of any kind
- 7With 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 |
|---|---|---|---|---|---|
| Solids, suspended percent removal | 0 | 18 | 18 | April 30, 2026 | 287% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 0 | 12 | 12 | August 31, 2025 | 213% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 0 | 10 | 10 | June 30, 2025 | 96% over the limit |
| Solids, total suspended | 0 | 9 | 9 | June 30, 2025 | 126% over the limit |
| Coliform, fecal MPN + membrane ftl 44.5 C | 0 | 4 | 4 | July 31, 2026 | 141% over the limit |
| Phosphorus, total [as P] | 0 | 3 | 3 | July 31, 2026 | 286% over the limit |
| pH | 0 | 7 | 2 | March 31, 2024 | |
| Nitrogen, total [as N] | 0 | 1 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 1 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 1 | 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 MN0022624.
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, MN0022624.
Start the watch
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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 MN0022624 there.
Nearby on the register
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- Every permit record in Minnesota, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.