Clean Water Act discharge permit · NPDES MT0022578

USBOR HUNGRY HORSE DAM WWTP, Hungry Horse, MT: NPDES MT0022578 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
16Pollutants under a numeric limit
2Pollutants with an effluent exceedance

USBOR HUNGRY HORSE DAM WWTP, held by US BUREAU OF RECLAMATION, holds NPDES permit MT0022578, which discharges to South Fork Of The Flathead River. EPA’s file records it issued October 14, 2015 and expiring November 30, 2020. 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 filed	USBOR HUNGRY HORSE DAM WWTP
Permittee as filed	US BUREAU OF RECLAMATION
NPDES ID	MT0022578
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Federal facility
Issued	October 14, 2015
Expiration date	November 30, 2020
Address	Hungry Horse, MT 59919
Receiving water	SOUTH FORK OF THE FLATHEAD RIVER
Subwatershed	Hungry Horse Reservoir-Aurora Creek (HUC 170102090707)

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

Effluent limits and exceedances

16Pollutants on file
16Under a numeric limit
9With a violation of any kind
2With an effluent exceedance

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 measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Solids, total suspended	6	8	2	April 30, 2009	87% over the limit
pH	6	8	1	December 31, 1996
Phosphorus, total [as P]	2	13	0
Flow rate	6	6	0
BOD, 5-day, 20 deg. C	6	6	0
Nitrogen, total [as N]	4	6	0
Nitrogen, Kjeldahl, total [as N]	2	4	0
Nitrite + Nitrate total [as N]	2	4	0
Nitrogen, ammonia total [as N]	2	2	0
Temperature, water deg. fahrenheit	12	0	0
Oil and grease, hexane extr method	4	0	0
E. coli, colony forming units [CFU]	4	0	0
Temperature, water deg. centigrade	3	0	0
Chlorine, total residual	2	0	0
BOD, 5-day, percent removal	1	0	0
Solids, suspended percent removal	1	0	0

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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MT0022578.

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

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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 MT0022578 there.

Nearby on the register

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

This public-records page covers NPDES permit MT0022578 for USBOR HUNGRY HORSE DAM WWTP in Hungry Horse, MT, held by US BUREAU OF RECLAMATION and discharging to the South Fork Of The Flathead River. The permit is listed as administratively continued, with a minor discharger class, 16 pollutants on file, 16 under a numeric limit, and 2 with an effluent exceedance.