Clean Water Act discharge permit · NPDES MT0020796

TOWN OF CIRCLE WWTP, Circle, MT: NPDES MT0020796 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
16Pollutants under a numeric limit
4Pollutants with an effluent exceedance

TOWN OF CIRCLE WWTP, held by TOWN OF CIRCLE, holds NPDES permit MT0020796, which discharges to Redwater River. EPA’s file records it issued June 29, 2010 and expiring July 31, 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	TOWN OF CIRCLE WWTP
Permittee as filed	TOWN OF CIRCLE
NPDES ID	MT0020796
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	June 29, 2010
Expiration date	July 31, 2015
Issuing agency	MONTANA DEQ
Address	Circle, MT 59215
Receiving water	REDWATER RIVER
Subwatershed	Redwater River-Circle (HUC 100600020505)

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

Effluent limits and exceedances

18Pollutants on file
16Under a numeric limit
18With a violation of any kind
4With 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	5	40	19	March 31, 2020	1,740% over the limit
pH	2	21	14	April 30, 2020
BOD, 5-day, 20 deg. C	5	29	8	May 31, 2017	484% over the limit
Solids, suspended percent removal	1	9	4	June 30, 2014	184% over the limit
Phosphorus, total [as P]	2	16	0
Nitrogen, total [as N]	2	15	0
Nitrogen, Kjeldahl, total [as N]	2	15	0
Nitrite + Nitrate total [as N]	2	15	0
Nitrogen, ammonia total [as N]	2	13	0
Chlorine, total residual	2	12	0
Flow rate	2	9	0
E. coli, MTEC-MF	4	8	0
BOD, 5-day, percent removal	1	5	0
Oil and grease, hexane extr method	1	4	0
Temperature, water deg. centigrade	1	3	0
Duration	1	3	0
Coliform, fecal general	0	2	0
Flow rate	0	1	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

5Single-event violations

Date	What EPA recorded	Agency
September 27, 2023	Permit Violations - CWA §308 Failure to submit required permit application information	ST6
August 23, 2023	Permit Violations - CWA §308 Failure to submit required permit application information	ST6
January 24, 2018	Management Practice Violations - Failure to Maintain Records	ST6
January 24, 2018	Monitoring Violations - Improper Analysis or Lab Error	ST6
January 24, 2018	Reporting Violations - Improper/ Incorrect Reporting	ST6

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 MT0020796 there.

Nearby on the register

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

This public-records page covers the NPDES MT0020796 Clean Water Act discharge permit held by TOWN OF CIRCLE for TOWN OF CIRCLE WWTP in Circle, MT, which discharges to the Redwater River. The permit is listed as administratively continued and a minor discharger, with 16 pollutants under a numeric limit and 4 pollutants with an effluent exceedance. The page also lists 18 pollutants on file, of which 18 have a violation of any kind.