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Clean Water Act discharge permit · NPDES MT0022616

DEER LODGE WWTP, Deer Lodge, MT: NPDES MT0022616 discharge permit, effluent exceedances, inspections, penalties

DEER LODGE WWTP, held by CITY OF DEER LODGE, holds NPDES permit MT0022616, which discharges to Upper Clark Fork River. EPA’s file records it issued September 27, 2006 and expiring October 31, 2011. 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 filedDEER LODGE WWTP
Permittee as filedCITY OF DEER LODGE
NPDES IDMT0022616
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedSeptember 27, 2006
Expiration dateOctober 31, 2011
Issuing agencyMONTANA DEQ
AddressDeer Lodge, MT 59722
Receiving waterUPPER CLARK FORK RIVER
SubwatershedClark Fork River-Deerlodge (HUC 170102010707)
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
BOD, 5-day, percent removal32818April 30, 2011123% over the limit
E. coli, MTEC-MF83012August 31, 2009298% over the limit
Solids, suspended percent removal3188November 30, 2010145% over the limit
BOD, 5-day, 20 deg. C15502April 30, 2008317% over the limit
Solids, total suspended15500
Temperature, water deg. centigrade3290
pH6280
Flow, in conduit or thru treatment plant4230
Flow rate4220
Phosphorus, total [as P]10210
Nitrogen, total [as N]10200
Chlorine, total residual2180
Copper, total recoverable2120
Cyanide, total [as CN]2110
Mercury, total recoverable2110
Oxygen, dissolved [DO]1110
Nitrogen, ammonia total [as N]1110
Nitrogen, Kjeldahl, total [as N]1100
Nitrite + Nitrate total [as N]1100
Arsenic, total recoverable290
Hardness, total [as CaCO3]280
Selenium, total recoverable280
Thallium, total recoverable280
Beryllium, total recoverable [as Be]280
Nickel, total recoverable280
Silver total recoverable280
Zinc, total recoverable280
Cadmium, total recoverable280
Lead, total recoverable280
Chromium, total recoverable280
Antimony, total recoverable280
Total phenols280
Coliform, fecal general050
Solids, total dissolved [TDS]330
Oil and grease, hexane extr method130
Chemical Oxygen Demand [COD]420
Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia120
Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas120
Specific conductance300

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 16, 2025Reporting Violations - Improper/ Incorrect ReportingST6
January 16, 2025Monitoring Violations - Improper Analysis or Lab ErrorST6
August 2, 2023Reporting Violations - Improper/ Incorrect ReportingST6
February 25, 2021Monitoring Violations - Frequency of Sampling ViolationST6
February 25, 2021Reporting Violations - Improper/ Incorrect ReportingST6
January 23, 2019Effluent Violations - Numeric effluent violationST6
January 23, 2019Monitoring Violations - Invalid/Unrepresentative SampleST6
January 23, 2019Monitoring Violations - Improper Analysis or Lab ErrorST6
January 23, 2019Reporting Violations - Improper/ Incorrect ReportingST6
January 23, 2019Monitoring Violations - Analysis not ConductedST6

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 the NPDES MT0022616 Clean Water Act discharge permit held by the City of Deer Lodge for the Deer Lodge WWTP, a publicly owned treatment works discharging to the Upper Clark Fork River, with an administratively continued status and a Major discharger class. The page lists 4 pollutants under a numeric limit, 4 pollutants with an effluent exceedance, and a discharger class of 38.