Clean Water Act discharge permit · NPDES MT0030597
POPLAR, TOWN OF, Poplar, MT: NPDES MT0030597 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 24Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
POPLAR, TOWN OF, held by Poplar, Town of, holds NPDES permit MT0030597. EPA’s file records it issued September 26, 2011 and expiring September 30, 2016. 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 | POPLAR, TOWN OF |
|---|---|
| Permittee as filed | Poplar, Town of |
| NPDES ID | MT0030597 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 26, 2011 |
| Expiration date | September 30, 2016 |
| Issuing agency | U.S. EPA Region 8 |
| Address | Poplar, MT 59255 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Missouri River-Glendive Coulee (HUC 100600050201) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 37Pollutants on file
- 24Under a numeric limit
- 37With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 2 | 211 | 125 | October 31, 2017 | 3,620,900% over the limit |
| E. coli | 2 | 214 | 122 | July 31, 2025 | 7,047,519% over the limit |
| BOD, 5-day, 20 deg. C | 5 | 377 | 115 | February 28, 2021 | 767% over the limit |
| Solids, suspended percent removal | 1 | 152 | 86 | June 30, 2023 | 567% over the limit |
| BOD, 5-day, percent removal | 1 | 146 | 84 | February 28, 2021 | 567% over the limit |
| Solids, total suspended | 5 | 345 | 78 | December 31, 2022 | 2,367% over the limit |
| E. coli, MTEC-MF | 0 | 108 | 61 | September 30, 2011 | 476,090% over the limit |
| pH | 2 | 125 | 8 | February 28, 2025 | |
| Floating solids, waste or visible foam-visual | 0 | 25 | 3 | January 31, 2009 | |
| Oil and grease visual | 1 | 56 | 2 | April 30, 2008 | 99,999% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 96 | 0 | ||
| Oil & Grease | 1 | 72 | 0 | ||
| Nickel, total [as Ni] | 1 | 43 | 0 | ||
| Cadmium, total [as Cd] | 1 | 42 | 0 | ||
| Chromium, total [as Cr] | 1 | 42 | 0 | ||
| Copper, total [as Cu] | 1 | 42 | 0 | ||
| Lead, total [as Pb] | 1 | 42 | 0 | ||
| Arsenic, total [as As] | 1 | 41 | 0 | ||
| Silver, total [as Ag] | 1 | 41 | 0 | ||
| Zinc, total [as Zn] | 1 | 41 | 0 | ||
| Mercury, total [as Hg] | 1 | 40 | 0 | ||
| Flow, total | 0 | 34 | 0 | ||
| Molybdenum, total [as Mo] | 0 | 30 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 22 | 0 | ||
| Nitrogen, total [as N] | 1 | 18 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 17 | 0 | ||
| Phosphorus, total [as P] | 0 | 15 | 0 | ||
| Nitrogen-nitrite in water, [pct] | 0 | 14 | 0 | ||
| Nitrogen-nitrate in water, [pct] | 0 | 14 | 0 | ||
| Chlorine, total residual | 0 | 14 | 0 | ||
| Temperature, water deg. centigrade | 0 | 11 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 11 | 0 | ||
| Nitrogen, nitrite total [as N] | 1 | 6 | 0 | ||
| Nitrogen, nitrate total [as N] | 1 | 6 | 0 | ||
| Static Renewal 96Hr Acute Pimephales promelas | 0 | 6 | 0 | ||
| Toxic Units Static Renewal 48Hr Acute Ceriodaphnia dubia | 0 | 6 | 0 | ||
| Selenium, total [as Se] | 0 | 5 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 23, 2019 | Effluent Violations - Unauthorized Discharge | EP6 |
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, MT0030597.
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 MT0030597 there.
Nearby on the register
- Discharge permits in Poplar
- Every permit record in Poplar, 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.