Clean Water Act discharge permit · NPDES MTG580035

CITY OF THOMPSON FALLS WWTF, Thompson Falls, MT: NPDES MTG580035 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
5Pollutants under a numeric limit
1Pollutants with an effluent exceedance

CITY OF THOMPSON FALLS WWTF, held by CITY OF THOMPSON FALLS, holds NPDES permit MTG580035, which discharges to Clark Fork River. EPA’s file records it issued April 4, 2000 and expiring September 30, 2004. 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 filed	CITY OF THOMPSON FALLS WWTF
Permittee as filed	CITY OF THOMPSON FALLS
NPDES ID	MTG580035
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	April 4, 2000
Expiration date	September 30, 2004
Issuing agency	MONTANA DEQ
Address	Thompson Falls, MT 59873
Receiving water	CLARK FORK RIVER
Subwatershed	Clark Fork River-Ashley Creek (HUC 170102130514)
SIC	4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

12Pollutants on file
5Under a numeric limit
11With a violation of any kind
1With 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
BOD, 5-day, 20 deg. C	1	13	11	October 31, 2016	313% over the limit
Flow rate	1	2	0
Solids, total suspended	1	2	0
Duration of discharge	1	2	0
Temperature, water deg. centigrade	0	1	0
pH	0	1	0
Nitrogen, total [as N]	0	1	0
Nitrogen, ammonia total [as N]	0	1	0
Nitrogen, Kjeldahl, total [as N]	0	1	0
Nitrite + Nitrate total [as N]	0	1	0
Phosphorus, total [as P]	0	1	0
Coliform, fecal general	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 MTG580035.

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 MTG580035 there.

Nearby on the register

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

This public-records page covers Clean Water Act NPDES permit MTG580035 for the City of Thompson Falls WWTF in Thompson Falls, MT, a minor discharger that is administratively continued after its expiration date. The page lists 5 as the discharger class, 1 pollutant under a numeric limit, and 1 pollutant with an effluent exceedance, with the permit issued April 4, 2000 and expiring September 30, 2004.