Clean Water Act discharge permit · NPDES MT0000931
HARLEM WTP, Harlem, MT: NPDES MT0000931 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
HARLEM WTP, held by CITY OF HARLEM, holds NPDES permit MT0000931, which discharges to Milk River. EPA’s file records it issued July 23, 2007 and expiring August 31, 2012. 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 | HARLEM WTP |
|---|---|
| Permittee as filed | CITY OF HARLEM |
| NPDES ID | MT0000931 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | July 23, 2007 |
| Expiration date | August 31, 2012 |
| Issuing agency | MONTANA DEQ |
| Address | Harlem, MT 59520 |
| 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
- 12Pollutants on file
- 6Under a numeric limit
- 12With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 5 | 100 | 8 | April 30, 2009 | 37,122% over the limit |
| Chlorine, total residual | 3 | 67 | 4 | April 30, 2009 | 5,809% over the limit |
| Aluminum, dissolved [as Al] | 3 | 22 | 3 | April 30, 2009 | 26,337% over the limit |
| pH | 2 | 60 | 0 | ||
| Flow rate | 2 | 58 | 0 | ||
| Duration of discharge | 0 | 25 | 0 | ||
| Copper, total recoverable | 0 | 21 | 0 | ||
| Mercury, total recoverable | 0 | 14 | 0 | ||
| Hardness, total [as CaCO3] | 0 | 8 | 0 | ||
| BOD, 5-day, 20 deg. C | 0 | 6 | 0 | ||
| Solids, total dissolved [TDS] | 0 | 6 | 0 | ||
| Duration | 1 | 3 | 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 MT0000931.
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
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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 MT0000931 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.