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Clean Water Act discharge permit · NPDES MT0022560

EAST HELENA WWTF, East Helena, MT: NPDES MT0022560 discharge permit, effluent exceedances, inspections, penalties

EAST HELENA WWTF, held by CITY OF EAST HELENA, holds NPDES permit MT0022560, which discharges to Prickly Pear Crk. EPA’s file records it issued August 31, 2009 and expiring September 30, 2014. 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 filedEAST HELENA WWTF
Permittee as filedCITY OF EAST HELENA
NPDES IDMT0022560
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedAugust 31, 2009
Expiration dateSeptember 30, 2014
AddressEast Helena, MT 59635
Receiving waterPRICKLY PEAR CRK
Receiving water impaired303(D) Listed
SubwatershedLower Prickley Pear Gulch (HUC 100301011310)
SIC4952 – 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

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
Copper, total recoverable55044April 30, 2026159% over the limit
Coliform, fecal general07136August 31, 200811,900% over the limit
BOD, 5-day, 20 deg. C63829July 31, 2026211% over the limit
Phosphorus, total [as P]53221July 31, 2026499% over the limit
Nitrogen, ammonia total [as N]32516September 30, 20191,176% over the limit
Nitrogen, total [as N]92415July 31, 2026102% over the limit
pH42310December 31, 2009
E. coli, MTEC-MF488October 31, 20251,054% over the limit
Solids, total suspended7112December 31, 2021131% over the limit
Solids, suspended percent removal122September 30, 201010% over the limit
Chlorine, total residual291September 30, 199940% over the limit
Temperature, water deg. fahrenheit090
Zinc, total recoverable560
Lead, total recoverable560
Nitrite + Nitrate total [as N]230
Flow rate620
Oxygen, dissolved [DO]420
Nitrogen, Kjeldahl, total [as N]220
Hardness, total [as CaCO3]400
Temperature, water deg. centigrade300
Arsenic, total recoverable200
Aluminum, dissolved [as Al]200
Antimony, total recoverable200
Oil & Grease100
Cyanide, total [as CN]100
Selenium, total recoverable100
Thallium, total recoverable100
Beryllium, total recoverable [as Be]100
Cadmium, total [as Cd]100
Nickel, total recoverable100
Silver total recoverable100
Cadmium, total recoverable100
Chromium, total recoverable100
Phenols100
Volatile Organic Compound [VOC]100
Solids, total dissolved [TDS]100
Mercury, total recoverable100
BOD, 5-day, percent removal100
Report due [yrmoda]100
Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia100
Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas100

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

DateWhat EPA recordedAgency
January 14, 2026Management Practice Violations - Improper Operation and MaintenanceST6
January 14, 2026Reporting Violations - Failure to NotifyST6
January 14, 2026Monitoring Violations - Invalid/Unrepresentative SampleST6
January 14, 2026Effluent Violations - Numeric effluent violationST6
January 14, 2026Reporting Violations - Failure to Submit DMRsST6
February 23, 2021Reporting Violations - Improper/ Incorrect ReportingST6
September 22, 2017Reporting Violations - Failure to submit required report (non-DMR non-pretreatment)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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Nearby on the register

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

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES MT0022560 for the EAST HELENA WWTF in East Helena, MT, held by CITY OF EAST HELENA and discharging to PRICKLY PEAR CRK. The permit is listed as administratively continued with a discharger class of Minor, and the facts record 11 pollutants under a numeric limit and 39 pollutants with an effluent exceedance.