Clean Water Act discharge permit · NPDES MN0066966
ANNANDALE/MAPLE LAKE/HOWARD LAKE WWTP, Maple Lake, MN: NPDES MN0066966 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 17Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
ANNANDALE/MAPLE LAKE/HOWARD LAKE WWTP, held by Annandale/Maple Lake/Howard Lake WWTP, holds NPDES permit MN0066966. EPA’s file records it issued November 1, 2021 and expiring May 31, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ANNANDALE/MAPLE LAKE/HOWARD LAKE WWTP |
|---|---|
| Permittee as filed | Annandale/Maple Lake/Howard Lake WWTP |
| NPDES ID | MN0066966 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 1, 2021 |
| Expiration date | May 31, 2023 |
| Issuing agency | STA |
| Address | Maple Lake, MN 55358 |
| Subwatershed | Rock Lake-North Fork Crow River (HUC 070102040604) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 17Pollutants on file
- 17Under a numeric limit
- 6With a violation of any kind
- 2With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 5 | 1 | 1 | March 31, 2014 | 3% over the limit |
| pH | 4 | 1 | 1 | February 28, 2026 | |
| Solids, total suspended | 8 | 58 | 0 | ||
| Phosphorus, total [as P] | 5 | 17 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 6 | 4 | 0 | ||
| Coliform, fecal MPN + membrane ftl 44.5 C | 1 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 0 | 0 | ||
| Mercury, total [as Hg] | 3 | 0 | 0 | ||
| Nitrogen, total [as N] | 2 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 0 | 0 | ||
| Mercury, dissolved [as Hg] | 2 | 0 | 0 | ||
| Precipitation, total defined period/in | 1 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Solids, total dissolved | 1 | 0 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 1 | 0 | 0 | ||
| Solids, suspended percent removal | 1 | 0 | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 6, 2018 | Effluent Violations - Unauthorized Discharge | ST6 |
| February 6, 2018 | Monitoring Violations - Analysis not Conducted | ST6 |
| July 6, 2017 | Permit Violations - Failure to Submit Timely Permit Renewal Application | 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.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.