Velarion Records

Clean Water Act discharge permit · NPDES MT0022012

BUTTE-SILVER BOW WWTP, Butte, MT: NPDES MT0022012 discharge permit, effluent exceedances, inspections, penalties

BUTTE-SILVER BOW WWTP, held by BUTTE SILVER BOW CITY AND COUNTY, holds NPDES permit MT0022012, which discharges to Silver Bow Creek. EPA’s file records it issued September 29, 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 filedBUTTE-SILVER BOW WWTP
Permittee as filedBUTTE SILVER BOW CITY AND COUNTY
NPDES IDMT0022012
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 29, 2006
Expiration dateOctober 31, 2011
Issuing agencyMONTANA DEQ
AddressButte, MT 59701
Receiving waterSILVER BOW CREEK
SubwatershedSilver Bow Creek-Butte (HUC 170102010204)
Program components on filePOTW, Pretreatment
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
Chlorine, total residual31111July 31, 2009390% over the limit
Copper, total recoverable286March 31, 2018728% over the limit
Coliform, fecal general043September 30, 1998112% over the limit
Zinc, total recoverable242June 30, 20187% over the limit
pH422May 31, 2017
Nitrogen, ammonia total [as N]222March 31, 2018104% over the limit
Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas122June 30, 2007
Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia111June 30, 2007
E. coli, MTEC-MF1020
Cadmium, total recoverable220
Mercury, total recoverable220
BOD, 5-day, 20 deg. C1100
Solids, total suspended1100
Nitrogen, total [as N]800
Phosphorus, total [as P]800
Flow, in conduit or thru treatment plant400
Chemical Oxygen Demand [COD]400
Temperature, water deg. centigrade300
Flow rate200
Specific conductance200
Arsenic, total recoverable200
Selenium, total recoverable200
Thallium, total recoverable200
Beryllium, total recoverable [as Be]200
Nickel, total recoverable200
Silver total recoverable200
Lead, total recoverable200
Chromium, total recoverable200
Antimony, total recoverable200
BOD, 5-day, percent removal200
Solids, suspended percent removal200
Oxygen, dissolved [DO]100
Oil and grease, hexane extr method100
Nitrogen, Kjeldahl, total [as N]100
Nitrite + Nitrate total [as N]100
Cyanide, total [as CN]100
Hardness, total [as CaCO3]100
Total phenols100
Solids, total dissolved [TDS]100

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
December 31, 2025PR: Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II)ST6
January 9, 2025Management Practice Violations - Failure to Maintain RecordsST6
January 9, 2025Monitoring Violations - Improper Analysis or Lab ErrorST6
January 9, 2025Reporting Violations - Improper/ Incorrect ReportingST6
December 31, 2024PR: Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II)ST6
December 14, 2022Reporting Violations - Improper/ Incorrect ReportingST6
September 2, 2021Reporting Violations - Improper/ Incorrect ReportingST6
September 2, 2021Monitoring Violations - Invalid/Unrepresentative SampleST6
March 23, 2017Reporting Violations - Failure to submit required report (non-DMR non-pretreatment)ST6
March 23, 2017Monitoring Violations - Improper Analysis or Lab ErrorST6
March 23, 2017Reporting Violations - Improper/ Incorrect ReportingST6

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 MT0022012 there.

Nearby on the register

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

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