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Clean Water Act discharge permit · NPDES MNG585187

WINTON WWTP, Winton, MN: NPDES MNG585187 discharge permit, effluent exceedances, inspections, penalties

WINTON WWTP, held by Winton city of, holds NPDES permit MNG585187. EPA’s file records it issued August 1, 2021 and expiring November 30, 2023.

WINTON WWTP, Winton, Minnesota: Coverage under a general permit MNG585187, held by Winton city of; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued August 1, 2021, term to November 30, 2023, by STA.

  • Solids, total suspended: 5 limits, 8 violations of any kind, 0 effluent exceedances.
  • BOD, carbonaceous [5 day, 20 C]: 5 limits, 8 violations of any kind, 0 effluent exceedances.
  • pH: 3 limits, 4 violations of any kind, 0 effluent exceedances.
  • Phosphorus, total [as P]: 3 limits, 4 violations of any kind, 0 effluent exceedances.
  • Oxygen, dissolved [DO]: 1 limit, 2 violations of any kind, 0 effluent exceedances.
  • Flow, in conduit or thru treatment plant: 9 limits, 0 violations of any kind, 0 effluent exceedances.
  • Nitrogen, total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Nitrogen, Kjeldahl, total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Nitrite + Nitrate total [as N]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Precipitation, total defined period/in: 1 limit, 0 violations of any kind, 0 effluent exceedances.
  • Sulfate, total [as SO4]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
  • Coliform, fecal MPN + membrane ftl 44.5 C: 1 limit, 0 violations of any kind, 0 effluent exceedances.
  • August 14, 2024: Monitoring Violations - Invalid/Unrepresentative Sample (ST6).
  • August 14, 2024: Management Practice Violations - Failure to Maintain Records (ST6).
  • August 14, 2024: Monitoring Violations - Frequency of Sampling Violation (ST6).
  • August 14, 2024: Monitoring Violations - Improper Analysis or Lab Error (ST6).
  • August 14, 2024: Permit Violations - Violation Specified in Comment (ST6).
  • August 14, 2024: Management Practice Violations - Improper Operation and Maintenance (ST6).

Minnesota holds 240 Publicly owned treatment works coverages of this permit type in EPA’s file; 178 were issued before MNG585187.

Coverages issued nearest MNG585187

  • August 1, 2021: JEFFERS WWTP, Jeffers, MNG585111, held by Jeffers city of
  • August 1, 2021: MILAN WWTP, Milan, MNG585141, held by Milan city of
  • August 1, 2021: ORTONVILLE WWTP, Ortonville, MNG585151, held by Ortonville city of
  • August 1, 2021: BELLINGHAM WWTP, Bellingham, MNG585152, held by Bellingham city of
  • August 1, 2021: SILVER LAKE WWTP, Silver Lake, MNG585164, held by Silver Lake city of
  • August 1, 2021: EVAN WWTP, Evan, MNG585202, held by Evan city of
  • August 1, 2021: EAGLE BEND WWTP, Eagle Bend, MNG585383, held by Eagle Bend city of
  • January 1, 2022: COTTONWOOD WWTP, Cottonwood, MNG585010, held by Cottonwood city of
  • January 1, 2022: GIBBON WWTP, Gibbon, MNG585020, held by Gibbon city of
  • January 1, 2022: JANESVILLE WWTP, Janesville, MNG585025, held by Janesville city of

WINTON WWTP among its neighbors

EPA’s permit file holds 4 discharge permits in the Shagawa Lake subwatershed (HUC 090300011002), MNG585187 among them. Its county holds 90, 6 of them major permits; MNG585187 is a minor permit.

Other permits in the Shagawa Lake subwatershed (HUC 090300011002)

  • BIRDIE SAND AND GRAVEL LLC, Ely: MNG490644, minor permit, permit term to May 31, 2027
  • ELY, Ely: MNL020508, minor permit, permit term to December 31, 2025
  • ELY WTP, Ely: MNG640109, minor permit, permit term to June 30, 2023

Identity

Facility as filedWINTON WWTP
Permittee as filedWinton city of
NPDES IDMNG585187
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
IssuedAugust 1, 2021
Expiration dateNovember 30, 2023
Issuing agencySTA
AddressWinton, MN 55796
SubwatershedShagawa Lake (HUC 090300011002)

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 suspended580
BOD, carbonaceous [5 day, 20 C]580
pH340
Phosphorus, total [as P]340
Oxygen, dissolved [DO]120
Flow, in conduit or thru treatment plant900
Nitrogen, total [as N]200
Nitrogen, Kjeldahl, total [as N]200
Nitrite + Nitrate total [as N]200
Precipitation, total defined period/in100
Sulfate, total [as SO4]100
Coliform, fecal MPN + membrane ftl 44.5 C100

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MNG585187.

Inspections, violations and enforcement

DateWhat EPA recordedAgency
August 14, 2024Monitoring Violations - Invalid/Unrepresentative SampleST6
August 14, 2024Management Practice Violations - Failure to Maintain RecordsST6
August 14, 2024Monitoring Violations - Frequency of Sampling ViolationST6
August 14, 2024Monitoring Violations - Improper Analysis or Lab ErrorST6
August 14, 2024Permit Violations - Violation Specified in CommentST6
August 14, 2024Management Practice Violations - Improper Operation and MaintenanceST6

Inspections

EPA’s inspection file holds no inspection for NPDES MNG585187.

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 MNG585187.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

What this page shows

This public-records page covers the Clean Water Act discharge permit NPDES MNG585187 for the WINTON WWTP in Winton, MN, held by Winton city of and administratively continued past its expiration date. EPA's file lists 12 pollutants on file, 12 of them under a numeric limit, 5 with a violation of any kind, and 0 with an effluent exceedance. The subwatershed is Shagawa Lake (HUC 090300011002), and the page also carries a promotional banner for Velarion Intel and its executive pay content, which is unrelated to the permit.