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Federal facility (Electric Services), Hungry Horse, Montana. NPDES permit MT0022578 expired Aug 31, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Flow rate | monthly average | report only (MGD) | all year | 001 |
| Flow rate | daily maximum | report only (MGD) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly maximum | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 2.3 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly maximum | ≤ 3.4 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 2.3 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 3.4 lb/d | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Oil & Grease | quarterly average | report only (mg/L) | all year | 001 |
| Oil & Grease | quarterly maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Jul–Sep | 001 |
| Nitrogen, total [as N] | maximum weekly average | report only (mg/L) | Jul–Sep | 001 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | Jul–Sep | 001 |
| Nitrogen, total [as N] | maximum weekly average | report only (lb/d) | Jul–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jul–Sep | 001 |
| Nitrogen, Kjeldahl, total [as N] | maximum weekly average | report only (mg/L) | Jul–Sep | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jul–Sep | 001 |
| Nitrite + Nitrate total [as N] | maximum weekly average | report only (mg/L) | Jul–Sep | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | Jul–Sep | 001 |
| Phosphorus, total [as P] | maximum weekly average | report only (mg/L) | Jul–Sep | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .8 lb/d | Jul–Sep | 001 |
| Phosphorus, total [as P] | maximum weekly average | report only (lb/d) | Jul–Sep | 001 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 630 #/100mL | Jan, Feb, Mar, Nov, Dec | 001 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 #/100mL | Apr–Oct | 001 |
| E. coli, MTEC-MF | maximum weekly average | ≤ 1260 #/100mL | Jan, Feb, Mar, Nov, Dec | 001 |
| E. coli, MTEC-MF | maximum weekly average | ≤ 252 #/100mL | Apr–Oct | 001 |
| Chlorine, total residual | monthly average | ≤ .1 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .1 mg/L | all year | 001 |
| BOD, 5-day, percent removal | minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | minimum | ≥ 85 % | all year | 001 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | weekly maximum | report only (deg C) | all year | 002 |
| Flow rate | monthly average | report only (MGD) | all year | 002 |
| Flow rate | weekly maximum | report only (MGD) | all year | 002 |
| pH | minimum | report only (SU) | all year | 002 |
| pH | maximum | report only (SU) | all year | 002 |
| Oil & Grease | quarterly average | report only (mg/L) | all year | 002 |
| Oil & Grease | quarterly maximum | report only (mg/L) | all year | 002 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | weekly maximum | report only (deg C) | all year | 003 |
| Flow rate | monthly average | report only (MGD) | all year | 003 |
| Flow rate | weekly maximum | report only (MGD) | all year | 003 |
| pH | minimum | report only (SU) | all year | 003 |
| pH | maximum | report only (SU) | all year | 003 |
| Oil & Grease | quarterly average | report only (mg/L) | all year | 003 |
| Oil & Grease | quarterly maximum | report only (mg/L) | all year | 003 |
| Temperature, water deg. centigrade | daily minimum | report only (deg C) | all year | 004A |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 004A |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 004A |
| Flow rate | monthly average | report only (MGD) | all year | 004A |
| Flow rate | daily maximum | report only (MGD) | all year | 004A |
| Temperature, water deg. centigrade | daily minimum | report only (deg C) | all year | 004B |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 004B |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 004B |
| Flow rate | monthly average | report only (MGD) | all year | 004B |
| Flow rate | daily maximum | report only (MGD) | all year | 004B |
| Temperature, water deg. centigrade | daily minimum | report only (deg C) | all year | 004C |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 004C |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 004C |
| Flow rate | monthly average | report only (MGD) | all year | 004C |
| Flow rate | daily maximum | report only (MGD) | all year | 004C |
| Temperature, water deg. centigrade | daily minimum | report only (deg C) | all year | 004D |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 004D |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 004D |
| Flow rate | monthly average | report only (MGD) | all year | 004D |
| Flow rate | daily maximum | report only (MGD) | all year | 004D |
Cited limits by parameter: Montana's rules and the federal ones.
Same industry: the 3 Electric Services permits in Montana.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MT0022578 · MCP: https://passage-data.com/mcp