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Federal facility (Electric And Other Services Combined), Ahsahka, Idaho. NPDES permit ID0028586, in force until Mar 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | report only (mg/L) | all year | 001 |
| Oxygen, dissolved [DO] | daily average | report only (mg/L) | all year | 001 |
| Oxygen, dissolved [DO] | instantaneous maximum | report only (mg/L) | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Mercury, total [as Hg] | instantaneous minimum | report only (ug/L) | all year | 001 |
| Mercury, total [as Hg] | daily average | report only (ug/L) | all year | 001 |
| Mercury, total [as Hg] | instantaneous maximum | report only (ug/L) | all year | 001 |
| Methylmercury | instantaneous minimum | report only (ug/L) | all year | 001 |
| Methylmercury | daily average | report only (ug/L) | all year | 001 |
| Methylmercury | instantaneous maximum | report only (ug/L) | all year | 001 |
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 002 |
| Oxygen, dissolved [DO] | instantaneous minimum | report only (mg/L) | all year | 002 |
| Oxygen, dissolved [DO] | daily average | report only (mg/L) | all year | 002 |
| Oxygen, dissolved [DO] | instantaneous maximum | report only (mg/L) | all year | 002 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Mercury, total [as Hg] | instantaneous minimum | report only (ug/L) | all year | 002 |
| Mercury, total [as Hg] | daily average | report only (ug/L) | all year | 002 |
| Mercury, total [as Hg] | instantaneous maximum | report only (ug/L) | all year | 002 |
| Methylmercury | instantaneous minimum | report only (ug/L) | all year | 002 |
| Methylmercury | daily average | report only (ug/L) | all year | 002 |
| Methylmercury | instantaneous maximum | report only (ug/L) | all year | 002 |
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 003 |
| Oxygen, dissolved [DO] | instantaneous minimum | report only (mg/L) | all year | 003 |
| Oxygen, dissolved [DO] | daily average | report only (mg/L) | all year | 003 |
| Oxygen, dissolved [DO] | instantaneous maximum | report only (mg/L) | all year | 003 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 003 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 003 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Mercury, total [as Hg] | instantaneous minimum | report only (ug/L) | all year | 003 |
| Mercury, total [as Hg] | daily average | report only (ug/L) | all year | 003 |
| Mercury, total [as Hg] | instantaneous maximum | report only (ug/L) | all year | 003 |
| Methylmercury | instantaneous minimum | report only (ug/L) | all year | 003 |
| Methylmercury | daily average | report only (ug/L) | all year | 003 |
| Methylmercury | instantaneous maximum | report only (ug/L) | all year | 003 |
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 004 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 004 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 004 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 004 |
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 004 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 004 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 004 |
| Oxygen, dissolved [DO] | instantaneous minimum | report only (mg/L) | all year | 004 |
| Oxygen, dissolved [DO] | daily average | report only (mg/L) | all year | 004 |
| Oxygen, dissolved [DO] | instantaneous maximum | report only (mg/L) | all year | 004 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 004 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 004 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 004 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Mercury, total [as Hg] | instantaneous minimum | report only (ug/L) | all year | 004 |
| Mercury, total [as Hg] | daily average | report only (ug/L) | all year | 004 |
| Mercury, total [as Hg] | instantaneous maximum | report only (ug/L) | all year | 004 |
| Methylmercury | instantaneous minimum | report only (ug/L) | all year | 004 |
| Methylmercury | daily average | report only (ug/L) | all year | 004 |
| Methylmercury | instantaneous maximum | report only (ug/L) | all year | 004 |
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 005 |
| Oxygen, dissolved [DO] | instantaneous minimum | report only (mg/L) | all year | 005 |
| Oxygen, dissolved [DO] | daily average | report only (mg/L) | all year | 005 |
| Oxygen, dissolved [DO] | instantaneous maximum | report only (mg/L) | all year | 005 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 005 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 005 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 005 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Mercury, total [as Hg] | instantaneous minimum | report only (ug/L) | all year | 005 |
| Mercury, total [as Hg] | daily average | report only (ug/L) | all year | 005 |
| Mercury, total [as Hg] | instantaneous maximum | report only (ug/L) | all year | 005 |
| Methylmercury | instantaneous minimum | report only (ug/L) | all year | 005 |
| Methylmercury | daily average | report only (ug/L) | all year | 005 |
| Methylmercury | instantaneous maximum | report only (ug/L) | all year | 005 |
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 006 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 006 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 006 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 006 |
| Temperature, water deg. centigrade | 7-day maximum | report only (deg C) | all year | 006 |
| Temperature, water deg. centigrade | maximum daily average | report only (deg C) | all year | 006 |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | all year | 006 |
| Oxygen, dissolved [DO] | instantaneous minimum | report only (mg/L) | all year | 006 |
| Oxygen, dissolved [DO] | daily average | report only (mg/L) | all year | 006 |
| Oxygen, dissolved [DO] | instantaneous maximum | report only (mg/L) | all year | 006 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 006 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 006 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 006 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Mercury, total [as Hg] | instantaneous minimum | report only (ug/L) | all year | 006 |
| Mercury, total [as Hg] | daily average | report only (ug/L) | all year | 006 |
| Mercury, total [as Hg] | instantaneous maximum | report only (ug/L) | all year | 006 |
| Methylmercury | instantaneous minimum | report only (ug/L) | all year | 006 |
| Methylmercury | daily average | report only (ug/L) | all year | 006 |
| Methylmercury | instantaneous maximum | report only (ug/L) | all year | 006 |
| Oil and grease visual | instantaneous maximum | ≤ 1 N=0;Y=1 | all year | SUM |
Cited limits by parameter: Idaho's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/ID0028586 · MCP: https://passage-data.com/mcp