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Clean Water Act discharge permit · NPDES MNG585007

CHOKIO WWTP, Chokio, MN: NPDES MNG585007 discharge permit, effluent exceedances, inspections, penalties

CHOKIO WWTP, held by Chokio city of, holds NPDES permit MNG585007. EPA’s file records it issued March 1, 2021 and expiring November 30, 2023.

CHOKIO WWTP, Chokio, Minnesota: Coverage under a general permit MNG585007, held by Chokio city of; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued March 1, 2021, term to November 30, 2023, by STA.

  • Solids, total suspended: 5 limits, 6 violations of any kind, 6 effluent exceedances, latest April 30, 2026, largest 42% over the limit.
  • BOD, carbonaceous [5 day, 20 C]: 5 limits, 2 violations of any kind, 2 effluent exceedances, latest April 30, 2026, largest 8% over the limit.
  • Flow, in conduit or thru treatment plant: 9 limits, 0 violations of any kind, 0 effluent exceedances.
  • Phosphorus, total [as P]: 4 limits, 0 violations of any kind, 0 effluent exceedances.
  • pH: 3 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.
  • Oxygen, dissolved [DO]: 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.

Minnesota holds 240 Publicly owned treatment works coverages of this permit type in EPA’s file; 171 were issued before MNG585007. Chokio city of holds 2 permits in Minnesota.

Other permits held by Chokio city of

  • CHOKIO WTP, Chokio: MNG640022, issued July 1, 2018

Coverages issued nearest MNG585007

  • December 1, 2020: HOLLANDALE WWTP, Hollandale, MNG585374, held by Hollandale city of
  • December 1, 2020: HENDRICKS WWTP, Hendricks, MNG585377, held by Hendricks city of
  • December 1, 2020: OSLO WWTP, Oslo, MNG585379, held by Oslo city of
  • December 1, 2020: WALTHAM WWTP, Waltham, MNG585380, held by Waltham city of
  • January 1, 2021: MCKINLEY WWTP, Mckinley, MNG585367, held by McKinley city of
  • March 1, 2021: FREEBORN WWTP, Freeborn, MNG585018, held by Freeborn city of
  • March 1, 2021: ECHO WWTP, Echo, MNG585059, held by Echo city of
  • March 1, 2021: ROLLINGSTONE WWTP, Rollingstone, MNG585078, held by Rollingstone city of
  • March 1, 2021: BARNUM WWTP, Barnum, MNG585142, held by Barnum city of
  • March 1, 2021: HERMAN WWTP, Herman, MNG585177, held by Herman city of

CHOKIO WWTP among its neighbors

EPA’s permit file holds 4 discharge permits in the Headwaters Muddy Creek subwatershed (HUC 070200020401), MNG585007 among them. Its county holds 14, 0 of them major permits; MNG585007 is a minor permit.

Other permits in the Headwaters Muddy Creek subwatershed (HUC 070200020401)

  • ALBERTA, Alberta: MNG580002, minor permit, discharging to CO DT #4 VIA UNN DT, permit term to February 28, 2010
  • CHOKIO, Chokio: MNG580007, minor permit, discharging to POMME DE TERRE R VIA MUD CR, permit term to February 28, 2010
  • CHOKIO WTP, Chokio: MNG640022, minor permit, permit term to June 30, 2023

Identity

Facility as filedCHOKIO WWTP
Permittee as filedChokio city of
NPDES IDMNG585007
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
IssuedMarch 1, 2021
Expiration dateNovember 30, 2023
Issuing agencySTA
AddressChokio, MN 56221
Receiving water impaired303(D) Listed
SubwatershedHeadwaters Muddy Creek (HUC 070200020401)

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 suspended566April 30, 202642% over the limit
BOD, carbonaceous [5 day, 20 C]522April 30, 20268% over the limit
Flow, in conduit or thru treatment plant900
Phosphorus, total [as P]400
pH300
Nitrogen, total [as N]200
Nitrogen, Kjeldahl, total [as N]200
Nitrite + Nitrate total [as N]200
Precipitation, total defined period/in100
Oxygen, dissolved [DO]100
Coliform, fecal MPN + membrane ftl 44.5 C100

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES MNG585007.

Inspections

EPA’s inspection file holds no inspection for NPDES MNG585007.

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 MNG585007.

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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 Clean Water Act discharge permit MNG585007 for CHOKIO WWTP in Chokio, MN, held by Chokio city of, with the permit status shown as administratively continued. The figures listed are 11 pollutants on file, 11 under a numeric limit, 2 with a violation of any kind, and 2 with an effluent exceedance, within the Headwaters Muddy Creek (HUC 070200020401) subwatershed.