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Clean Water Act discharge permit · NPDES MTX000190

HAYFIELD ESTATES II LOT 25 JAMOR SUBDIVISION WASTEWATER TREATMENT SYSTEM, Helena, MT: NPDES MTX000190 discharge permit, effluent exceedances, inspections, penalties

HAYFIELD ESTATES II LOT 25 JAMOR SUBDIVISION WASTEWATER TREATMENT SYSTEM, held by HAYFIELD ESTATES HOMEWONERS ASSOCIATION LLC, holds NPDES permit MTX000190, which discharges to Ground Water. EPA’s file records it issued November 6, 2015 and expiring December 31, 2020. 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 filedHAYFIELD ESTATES II LOT 25 JAMOR SUBDIVISION WASTEWATER TREATMENT SYSTEM
Permittee as filedHAYFIELD ESTATES HOMEWONERS ASSOCIATION LLC
NPDES IDMTX000190
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeState-issued individual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedNovember 6, 2015
Expiration dateDecember 31, 2020
AddressHelena, MT 59602
Receiving waterGROUND WATER
SubwatershedLake Helena (HUC 100301011504)

Cited to the EPA ICIS-NPDES permit file (ECHO 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
Nitrogen, total [as N]410854September 30, 202387% over the limit
Solids, total dissolved [TDS]1360
Nitrite + Nitrate total [as N]3350
Nitrogen, Kjeldahl, total [as N]3340
Flow rate2270
Nitrogen, ammonia total [as N]0240
Chloride [as Cl]2220
Phosphorus, total [as P]3190
Specific conductance1150
Water level at sample collection time1120
pH0100
E. coli, MTEC-MF0100
Temperature, water deg. centigrade060
E. coli, colony forming units [CFU]150
BOD, 5-day, 20 deg. C020
Solids, total suspended010

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
November 19, 2025Management Practice Violations - Failure to Maintain RecordsST6
November 19, 2025Monitoring Violations - Invalid/Unrepresentative SampleST6
November 19, 2025Reporting 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.

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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 MTX000190 there.

Nearby on the register

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

What this page shows

This public-records page covers Clean Water Act NPDES permit MTX000190 for the Hayfield Estates II Lot 25 Jamor Subdivision wastewater treatment system in Helena, MT, held by Hayfield Estates Homewoners Association LLC, with a status of administratively continued and a minor discharger class. The page lists 10 for the discharger class and 1 pollutant under a numeric limit, plus 1 pollutant with an effluent exceedance, and records the permit as issued November 6, 2015 and expiring December 31, 2020.