Clean Water Act discharge permit · NPDES MT0020052

CHOTEAU SEWAGE TREATMENT PONDS, Choteau, MT: NPDES MT0020052 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
13Pollutants under a numeric limit
8Pollutants with an effluent exceedance

CHOTEAU SEWAGE TREATMENT PONDS, held by CITY OF CHOTEAU, holds NPDES permit MT0020052, which discharges to Teton River. EPA’s file records it issued October 21, 2010 and expiring November 30, 2015. 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	CHOTEAU SEWAGE TREATMENT PONDS
Permittee as filed	CITY OF CHOTEAU
NPDES ID	MT0020052
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	October 21, 2010
Expiration date	November 30, 2015
Address	Choteau, MT 59422
Receiving water	TETON RIVER
Subwatershed	Teton River-Hod Main Coulee (HUC 100302050401)

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

Effluent limits and exceedances

20Pollutants on file
13Under a numeric limit
20With a violation of any kind
8With 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	9	121	100	January 31, 2019	5,163% over the limit
Solids, total suspended	9	119	95	January 31, 2019	1,226% over the limit
BOD, 5-day, percent removal	2	59	49	February 28, 2019	1,168% over the limit
Solids, suspended percent removal	0	34	30	August 31, 2024	1,324% over the limit
E. coli, MTEC-MF	8	29	29	May 31, 2017	4,728% over the limit
pH	5	20	12	December 31, 2016
Nitrogen, ammonia total [as N]	2	19	4	December 31, 2004	160% over the limit
Coliform, fecal general	0	17	1	July 31, 2001	99,999% over the limit
Oxygen, dissolved [DO]	0	19	0
Flow rate	5	12	0
Phosphorus, total [as P]	2	9	0
Nitrogen, total [as N]	2	8	0
Temperature, water deg. centigrade	0	6	0
Chlorine, total residual	0	6	0
Temperature, water deg. fahrenheit	4	3	0
Nitrogen, Kjeldahl, total [as N]	1	3	0
Nitrite + Nitrate total [as N]	1	3	0
Oil and grease, hexane extr method	2	2	0
Solids, total dissolved [TDS]	0	2	0
Duration of discharge	0	2	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 MT0020052.

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 MT0020052 there.

Nearby on the register

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