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Electric Services, Colstrip, Montana. NPDES permit MT0031780, in force until Dec 31, 2026. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Flow rate | monthly average | report only (gal/d) | all year |
| Flow rate | monthly average | report only (gal/d) | all year |
| Flow rate | daily maximum | report only (gal/d) | all year |
| Flow rate | daily maximum | report only (gal/d) | all year |
| Conductivity | monthly average | report only (uS/cm) | all year |
| Conductivity | monthly average | report only (uS/cm) | all year |
| Conductivity | daily maximum | report only (uS/cm) | all year |
| Conductivity | daily maximum | report only (uS/cm) | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year |
| Nitrogen, total [as N] | monthly average | report only (ug/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (ug/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (ug/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (ug/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (ug/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (ug/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (ug/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (ug/L) | all year |
| Nitrite + Nitrate total [as N] | monthly average | report only (ug/L) | all year |
| Nitrite + Nitrate total [as N] | monthly average | report only (ug/L) | all year |
| Nitrite + Nitrate total [as N] | daily maximum | report only (ug/L) | all year |
| Nitrite + Nitrate total [as N] | daily maximum | report only (ug/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (ug/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (ug/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (ug/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (ug/L) | all year |
| Aluminum, dissolved [as Al] | monthly average | report only (ug/L) | all year |
| Aluminum, dissolved [as Al] | monthly average | report only (ug/L) | all year |
| Aluminum, dissolved [as Al] | daily maximum | report only (ug/L) | all year |
| Aluminum, dissolved [as Al] | daily maximum | report only (ug/L) | all year |
| Solids, total dissolved [TDS] | monthly average | report only (mg/L) | all year |
| Solids, total dissolved [TDS] | monthly average | report only (mg/L) | all year |
| Solids, total dissolved [TDS] | daily maximum | report only (mg/L) | all year |
| Solids, total dissolved [TDS] | daily maximum | report only (mg/L) | all year |
| Precipitation, monthly accumulation | value | report only (in/d) | all year |
| Precipitation, monthly accumulation | value | report only (in/d) | all year |
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/MT0031780 · MCP: https://passage-data.com/mcp