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Clean Water Act discharge permit · NPDES ND0000264

MONTANA DAKOTA UTILITIES RM HESKETT STATION, Mandan, ND: NPDES ND0000264 discharge permit, effluent exceedances, inspections, penalties

MONTANA DAKOTA UTILITIES RM HESKETT STATION, held by Montana Dakota Utilities Co, holds NPDES permit ND0000264, which discharges to Painted Woods-Square Butte. EPA’s file records it issued June 25, 2019 and expiring June 30, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedMONTANA DAKOTA UTILITIES RM HESKETT STATION
Permittee as filedMontana Dakota Utilities Co
NPDES IDND0000264
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
IssuedJune 25, 2019
Expiration dateJune 30, 2024
Issuing agencyNorth Dakota Department of Environmental Quality
AddressMandan, ND 58554
Receiving waterPainted Woods-Square Butte
SubwatershedRock Haven Creek-Missouri River (HUC 101301011005)
NAICS221112 – Fossil Fuel Electric Power Generation
SIC4911 – Electric Services
Other EPA IDs (FRS)RCRA handler NDD000716720; ICIS-AIR source ND0000003805900001

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

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 suspended633September 30, 201868% over the limit
pH611June 30, 2020
Flow, in conduit or thru treatment plant820
Oil & Grease600
Chlorine, total residual400
Temperature, water deg. fahrenheit300
BOD, 5-day, 20 deg. C300
Nitrogen, ammonia total [as N]300
E. coli300
Flow, total300
Oil and grease visual100

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES ND0000264.

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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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 ND0000264 there.

Nearby on the register

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

What this page shows

This public-records page covers NPDES permit ND0000264 for MONTANA DAKOTA UTILITIES RM HESKETT STATION in Mandan, ND, held by Montana Dakota Utilities Co, which discharges to Painted Woods-Square Butte and is administratively continued as a Minor discharger. The page lists 11 pollutants under a numeric limit and 2 pollutants with an effluent exceedance, with the permit recorded as issued June 25, 2019 and expiring June 30, 2024.