Clean Water Act discharge permit · NPDES MT0021270
CITY OF HARLEM - WWTP, Harlem, MT: NPDES MT0021270 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 16Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
CITY OF HARLEM - WWTP, held by CITY OF HARLEM, holds NPDES permit MT0021270, which discharges to Milk River. EPA’s file records it issued August 31, 2009 and expiring September 30, 2014. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | CITY OF HARLEM - WWTP |
|---|---|
| Permittee as filed | CITY OF HARLEM |
| NPDES ID | MT0021270 |
| 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 | August 31, 2009 |
| Expiration date | September 30, 2014 |
| Issuing agency | MONTANA DEQ |
| Address | Harlem, MT 59526 |
| Receiving water | MILK RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Milk River-Harlem (HUC 100500041302) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 20Pollutants on file
- 16Under a numeric limit
- 20With a violation of any kind
- 7With 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, 20 deg. C | 10 | 26 | 24 | March 31, 2014 | 245% over the limit |
| E. coli, MTEC-MF | 8 | 27 | 18 | June 30, 2017 | 5,852% over the limit |
| Coliform, fecal general | 0 | 17 | 7 | March 31, 2009 | 804% over the limit |
| BOD, 5-day, percent removal | 2 | 5 | 5 | March 31, 2014 | 70% over the limit |
| Solids, suspended percent removal | 2 | 5 | 5 | June 30, 2016 | 23% over the limit |
| Chlorine, total residual | 4 | 3 | 3 | July 31, 2015 | 52% over the limit |
| Solids, total suspended | 10 | 20 | 1 | April 30, 2006 | 99,999% over the limit |
| Flow rate | 2 | 17 | 0 | ||
| Phosphorus, total [as P] | 2 | 6 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 5 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 5 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 5 | 0 | ||
| Nitrogen, total [as N] | 2 | 4 | 0 | ||
| pH | 4 | 3 | 0 | ||
| Temperature, water deg. centigrade | 2 | 1 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 1 | 0 | ||
| Oil & Grease | 1 | 1 | 0 | ||
| Salinity | 0 | 1 | 0 | ||
| Chloride [as Cl] | 0 | 1 | 0 | ||
| Solids, total dissolved | 0 | 1 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MT0021270.
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 MT0021270 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.