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Clean Water Act discharge permit · NPDES MNG585146

KARLSTAD WWTP, Karlstad, MN: NPDES MNG585146 discharge permit, effluent exceedances, inspections, penalties

KARLSTAD WWTP, held by Karlstad city of, holds NPDES permit MNG585146. EPA’s file records it issued December 1, 2020 and expiring November 30, 2023.

KARLSTAD WWTP, Karlstad, Minnesota: Coverage under a general permit MNG585146, held by Karlstad city of; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued December 1, 2020, term to November 30, 2023, by STA.

  • Solids, total suspended: 5 limits, 13 violations of any kind, 5 effluent exceedances, latest December 31, 2022, largest 78% over the limit.
  • BOD, carbonaceous [5 day, 20 C]: 5 limits, 13 violations of any kind, 5 effluent exceedances, latest December 31, 2022, largest 244% over the limit.
  • pH: 3 limits, 4 violations of any kind, 2 effluent exceedances, latest June 30, 2026.
  • Coliform, fecal MPN + membrane ftl 44.5 C: 1 limit, 1 violation of any kind, 1 effluent exceedance, latest June 30, 2021, largest 1,110% over the limit.
  • Nitrogen, total [as N]: 2 limits, 5 violations of any kind, 0 effluent exceedances.
  • Nitrogen, Kjeldahl, total [as N]: 2 limits, 5 violations of any kind, 0 effluent exceedances.
  • Nitrite + Nitrate total [as N]: 2 limits, 5 violations of any kind, 0 effluent exceedances.
  • Phosphorus, total [as P]: 3 limits, 4 violations of any kind, 0 effluent exceedances.
  • Nitrogen, ammonia total [as N]: 1 limit, 2 violations of any kind, 0 effluent exceedances.
  • Oxygen, dissolved [DO]: 1 limit, 1 violation of any kind, 0 effluent exceedances.
  • Solids, total dissolved: 1 limit, 1 violation of any kind, 0 effluent exceedances.
  • Flow, in conduit or thru treatment plant: 9 limits, 0 violations of any kind, 0 effluent exceedances.
  • Precipitation, total defined period/in: 1 limit, 0 violations of any kind, 0 effluent exceedances.

Minnesota holds 240 Publicly owned treatment works coverages of this permit type in EPA’s file; 144 were issued before MNG585146.

Coverages issued nearest MNG585146

  • December 1, 2020: STOCKTON WWTP, Stockton, MNG585079, held by Stockton city of
  • December 1, 2020: CLARKFIELD WWTP, Clarkfield, MNG585093, held by Clarkfield city of
  • December 1, 2020: LAMBERTON WWTP, Lamberton, MNG585100, held by Lamberton city of
  • December 1, 2020: PENNOCK WWTP, Pennock, MNG585104, held by Pennock city of
  • December 1, 2020: FERTILE WWTP, Fertile, MNG585138, held by Fertile city of
  • December 1, 2020: CANBY WWTP, Canby, MNG585154, held by Canby city of
  • December 1, 2020: MARIETTA WWTP, Marietta, MNG585160, held by Marietta city of
  • December 1, 2020: STEPHEN WWTP, Stephen, MNG585162, held by Stephen city of
  • December 1, 2020: NIELSVILLE WWTP, Nielsville, MNG585166, held by Nielsville city of
  • December 1, 2020: BIG STONE CO HUTTERITE COLONY GRACEVILLE, Graceville, MNG585168, held by Big Stone County Hutterite Colony

KARLSTAD WWTP among its neighbors

EPA’s permit file holds 1 discharge permits in the Headwaters Judicial Ditch No 10 subwatershed (HUC 090203110301), MNG585146 among them. Its county holds 14, 0 of them major permits; MNG585146 is a minor permit.

Identity

Facility as filedKARLSTAD WWTP
Permittee as filedKarlstad city of
NPDES IDMNG585146
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedDecember 1, 2020
Expiration dateNovember 30, 2023
Issuing agencySTA
AddressKarlstad, MN 56732
SubwatershedHeadwaters Judicial Ditch No 10 (HUC 090203110301)
SIC4952 – Sewerage Systems

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended5135December 31, 202278% over the limit
BOD, carbonaceous [5 day, 20 C]5135December 31, 2022244% over the limit
pH342June 30, 2026
Coliform, fecal MPN + membrane ftl 44.5 C111June 30, 20211,110% over the limit
Nitrogen, total [as N]250
Nitrogen, Kjeldahl, total [as N]250
Nitrite + Nitrate total [as N]250
Phosphorus, total [as P]340
Nitrogen, ammonia total [as N]120
Oxygen, dissolved [DO]110
Solids, total dissolved110
Flow, in conduit or thru treatment plant900
Precipitation, total defined period/in100

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES MNG585146.

Inspections

EPA’s inspection file holds no inspection for NPDES MNG585146.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES MNG585146.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers the Clean Water Act discharge permit NPDES MNG585146 for KARLSTAD WWTP in Karlstad, MN, held by Karlstad city of and administratively continued after its expiration date. The facts list 13 pollutants on file, 13 under a numeric limit, 4 with an effluent exceedance, and a discharger class of Minor.