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Clean Water Act discharge permit · NPDES MN0059404

CHIPPEWA RANCH WWSL, Mahnomen, MN: NPDES MN0059404 discharge permit, effluent exceedances, inspections, penalties

CHIPPEWA RANCH WWSL, held by WHITE EARTH RESERVATION, holds NPDES permit MN0059404, which discharges to Dt. EPA’s file records it issued September 20, 2018 and expiring September 14, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedCHIPPEWA RANCH WWSL
Permittee as filedWHITE EARTH RESERVATION
NPDES IDMN0059404
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedSeptember 20, 2018
Expiration dateSeptember 14, 2023
AddressMahnomen, MN 56557
Receiving waterDT
SubwatershedTwin Lake Creek (HUC 090201080303)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

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
BOD, carbonaceous [5 day, 20 C]102214November 30, 2021149% over the limit
Solids, total suspended102192November 30, 202142% over the limit
pH61740
Flow, in conduit or thru treatment plant6860
Oxygen, dissolved [DO]2800
Coliform, fecal general0700
Phosphorus, total [as P]4260
Nitrogen, ammonia total [as N]2260
Nitrogen, total [as N]2190
Nitrogen, Kjeldahl, total [as N]2190
Nitrite + Nitrate total [as N]2190
E. coli4170
BOD, carb-5 day, 20 deg C, percent removal2170
Solids, suspended percent removal2170
Rainfall2140
Outfall observation,visual, y/n response2140
Carbonaceous oxygen demand, % removal060
Sulfate, total [as SO4]250

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

DateWhat EPA recordedAgency
March 6, 2026Reporting Violations - Late Submittal of DMRsEP6
March 6, 2026Reporting Violations - Failure to Submit DMRsEP6
July 3, 2018Management Practice Violations - Failure to Maintain RecordsEP6
July 3, 2018Monitoring Violations - No Flow Measurement DeviceEP6
July 3, 2018Permit Violations - Violation Specified in CommentEP6

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, MN0059404.

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  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

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 MN0059404 there.

Nearby on the register

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