Clean Water Act discharge permit · NPDES MT0020311
CITY OF LAUREL WWTP, Laurel, MT: NPDES MT0020311 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 22Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
CITY OF LAUREL WWTP, held by CITY OF LAUREL, holds NPDES permit MT0020311, which discharges to Yellowstone River. EPA’s file records it issued May 20, 2009 and expiring June 30, 2014. 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 filed | CITY OF LAUREL WWTP |
|---|---|
| Permittee as filed | CITY OF LAUREL |
| NPDES ID | MT0020311 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 20, 2009 |
| Expiration date | June 30, 2014 |
| Issuing agency | MONTANA DEQ |
| Address | Laurel, MT 59044 |
| Receiving water | YELLOWSTONE RIVER |
| Subwatershed | Yellowstone River-Indian Creek (HUC 100700040602) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 25Pollutants on file
- 22Under a numeric limit
- 20With a violation of any kind
- 10With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, percent removal | 2 | 53 | 52 | June 30, 2013 | 105% over the limit |
| Solids, suspended percent removal | 2 | 17 | 16 | August 31, 2011 | 53% over the limit |
| Nitrogen, ammonia total [as N] | 1 | 17 | 15 | May 31, 2019 | 214% over the limit |
| BOD, 5-day, 20 deg. C | 9 | 19 | 14 | May 31, 2013 | 74% over the limit |
| Solids, total suspended | 9 | 16 | 11 | June 30, 2023 | 152% over the limit |
| E. coli, MTEC-MF | 8 | 11 | 9 | May 31, 2019 | 1,471% over the limit |
| Chlorine, total residual | 5 | 8 | 6 | June 30, 2013 | 2,058% over the limit |
| Phosphorus, total [as P] | 6 | 6 | 2 | April 30, 2019 | 50% over the limit |
| Nitrite + Nitrate total [as N] | 1 | 6 | 2 | April 30, 2021 | 61% over the limit |
| Nitrogen, total [as N] | 6 | 5 | 2 | February 28, 2015 | 12% over the limit |
| pH | 4 | 3 | 0 | ||
| Flow rate | 0 | 2 | 0 | ||
| Oil and grease, hexane extr method | 2 | 1 | 0 | ||
| Temperature, water deg. fahrenheit | 1 | 1 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 1 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 1 | 0 | ||
| Petrol hydrocarbons, total recoverable | 1 | 1 | 0 | ||
| Solids, total dissolved [TDS] | 1 | 1 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 0 | 1 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 0 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Flow rate | 1 | 0 | 0 | ||
| Report due [yrmoda] | 1 | 0 | 0 | ||
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | 1 | 0 | 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 |
|---|---|---|
| January 10, 2019 | Effluent Violations - Numeric effluent violation | ST6 |
| January 10, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| January 10, 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, MT0020311.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MT0020311 there.
Nearby on the register
- Discharge permits in Laurel
- Every permit record in Laurel, A to Z
- Discharge permits in Montana
- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.