Clean Water Act discharge permit · NPDES MTG581004
MONTANA STATE HOSPITAL SEWAGE TREATMENT LAGOONS, Warm Springs, MT: NPDES MTG581004 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 15Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
MONTANA STATE HOSPITAL SEWAGE TREATMENT LAGOONS, held by MONTANA STATE HOSPITAL, holds NPDES permit MTG581004, which discharges to Tributary To The Clark Fork River. EPA’s file records it issued January 18, 2018 and expiring December 31, 2022. 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 filed | MONTANA STATE HOSPITAL SEWAGE TREATMENT LAGOONS |
|---|---|
| Permittee as filed | MONTANA STATE HOSPITAL |
| NPDES ID | MTG581004 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | January 18, 2018 |
| Expiration date | December 31, 2022 |
| Address | Warm Springs, MT 59756 |
| Receiving water | TRIBUTARY TO THE CLARK FORK RIVER |
| Subwatershed | Warm Springs (HUC 170102010401) |
| SIC | 4952 – 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
- 15Pollutants on file
- 15Under a numeric limit
- 15With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| pH | 2 | 44 | 30 | June 30, 2023 | |
| E. coli, MTEC-MF | 4 | 33 | 19 | December 31, 2023 | 6,011% over the limit |
| Solids, suspended percent removal | 1 | 25 | 18 | July 31, 2023 | 493% over the limit |
| BOD, 5-day, percent removal | 1 | 11 | 4 | March 31, 2022 | 165% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 43 | 1 | March 31, 2018 | 0% over the limit |
| Solids, total suspended | 6 | 128 | 0 | ||
| Oil & Grease | 2 | 16 | 0 | ||
| Flow rate | 2 | 14 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 14 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 14 | 0 | ||
| Duration of discharge | 1 | 7 | 0 | ||
| Oil and grease visual | 1 | 6 | 0 | ||
| Nitrogen, total [as N] | 2 | 4 | 0 | ||
| Phosphorus, total [as P] | 2 | 4 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 2 | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 20, 2023 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| May 31, 2019 | Management Practice Violations - Failure to Maintain Records | ST6 |
| May 31, 2019 | Reporting 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.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MTG581004.
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- One watershed — $2,990/year
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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 MTG581004 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.