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Sewage treatment plant, Chewelah, Washington. NPDES permit WA0023604 expired Nov 29, 2016; its limits still apply. Last 12 months: no values over a limit, 7 required values missing, 7 of 72 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | all year | 001 |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | all year | 001 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | 001 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | 001 |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Oxygen, dissolved [DO] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Oxygen, dissolved [DO] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 10 mg/L | Jun–Oct | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 10 mg/L | Jun–Oct | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 30 mg/L (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 10 mg/L | Jun–Oct | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 10 mg/L | Jun–Oct | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 124 lb/d (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 124 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 124 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 59 lb/d | Jun–Oct | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 59 lb/d | Jun–Oct | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 186 lb/d (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 186 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 186 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 59 lb/d | Jun–Oct | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 59 lb/d | Jun–Oct | 001 |
| Alkalinity, total [as CaCO3] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Alkalinity, total [as CaCO3] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Alkalinity, total [as CaCO3] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Alkalinity, total [as CaCO3] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | Jun–Oct | 001 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | Jun–Oct | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 25 mg/L | Jun–Oct | 001 |
| Solids, total suspended | weekly average | ≤ 25 mg/L | Jun–Oct | 001 |
| Solids, total suspended | weekly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | monthly average | report only (lb/d) (alert, not enforceable) | Jun–Oct | 001 |
| Solids, total suspended | monthly average | report only (lb/d) (alert, not enforceable) | Jun–Oct | 001 |
| Solids, total suspended | monthly average | ≤ 124 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 124 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | weekly average | report only (lb/d) (alert, not enforceable) | Jun–Oct | 001 |
| Solids, total suspended | weekly average | report only (lb/d) (alert, not enforceable) | Jun–Oct | 001 |
| Solids, total suspended | weekly average | ≤ 186 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 186 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 8.5 lb/d (alert, not enforceable) | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 8.5 lb/d | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 8.5 lb/d | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Phosphorus, total [as P] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, total [as P] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Chlorine, total residual | monthly average | ≤ .01 ug/L | all year | 001 |
| Chlorine, total residual | monthly average | ≤ .01 ug/L | all year | 001 |
| pH, maximum | daily maximum | ≤ 7.8 SU | all year | 001 |
| pH, maximum | daily maximum | ≤ 7.8 SU | all year | 001 |
| pH, minimum | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH, minimum | daily minimum | ≥ 6.5 SU | all year | 001 |
| Coliform, fecal general | monthly average | ≤ 100 #/100mL | Jun–Oct | 001 |
| Coliform, fecal general | monthly average | ≤ 100 #/100mL | Jun–Oct | 001 |
| Coliform, fecal general | monthly average | ≤ 200 #/100mL | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Coliform, fecal general | monthly average | ≤ 200 #/100mL | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Coliform, fecal general | weekly average | ≤ 200 #/100mL | Jun–Oct | 001 |
| Coliform, fecal general | weekly average | ≤ 200 #/100mL | Jun–Oct | 001 |
| Coliform, fecal general | weekly average | ≤ 400 #/100mL | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Coliform, fecal general | weekly average | ≤ 400 #/100mL | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Flow | maximum | report only (MGD) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Flow | maximum | ≤ 1.06 MGD | Jun–Oct | 001 |
| Flow | maximum | ≤ 1.06 MGD | Jun–Oct | 001 |
| Flow | monthly average | ≤ 1.2 MGD | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Flow | monthly average | ≤ 1.2 MGD | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Flow | monthly average | ≤ 1.2 MGD | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Flow | monthly average | ≤ .71 MGD | Jun–Oct | 001 |
| Flow | monthly average | ≤ .71 MGD | Jun–Oct | 001 |
| Flow | maximum | report only (cfs) (alert, not enforceable) | all year | 002 |
| Flow | maximum | report only (cfs) (alert, not enforceable) | all year | 002 |
| Flow | monthly average | report only (cfs) (alert, not enforceable) | all year | 002 |
| Flow | monthly average | report only (cfs) (alert, not enforceable) | all year | 002 |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | May–Oct | 003 |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | May–Oct | 003 |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 003 |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 003 |
| pH | maximum | report only (SU) (alert, not enforceable) | May–Oct | 003 |
| pH | maximum | report only (SU) (alert, not enforceable) | May–Oct | 003 |
| Alkalinity, total [as CaCO3] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 003 |
| Alkalinity, total [as CaCO3] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 003 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 003 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 003 |
| Phosphorus, total [as P] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 003 |
| Phosphorus, total [as P] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 003 |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | May–Oct | 004 |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | May–Oct | 004 |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 004 |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 004 |
| pH | maximum | report only (SU) (alert, not enforceable) | May–Oct | 004 |
| pH | maximum | report only (SU) (alert, not enforceable) | May–Oct | 004 |
| Alkalinity, total [as CaCO3] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 004 |
| Alkalinity, total [as CaCO3] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 004 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 004 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 004 |
| Phosphorus, total [as P] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 004 |
| Phosphorus, total [as P] | maximum | report only (mg/L) (alert, not enforceable) | May–Oct | 004 |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | maximum | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | maximum | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | monthly average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | monthly average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | monthly average | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | monthly average | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Depth of pond or reservoir in feet | maximum | report only (ft) (alert, not enforceable) | all year | LA1 |
| Depth of pond or reservoir in feet | maximum | report only (ft) (alert, not enforceable) | all year | LA1 |
| Depth of pond or reservoir in feet | monthly average | report only (ft) (alert, not enforceable) | all year | LA1 |
| Depth of pond or reservoir in feet | monthly average | report only (ft) (alert, not enforceable) | all year | LA1 |
| Depth of pond or reservoir in feet | maximum | report only (ft) (alert, not enforceable) | all year | LA2 |
| Depth of pond or reservoir in feet | maximum | report only (ft) (alert, not enforceable) | all year | LA2 |
| Depth of pond or reservoir in feet | monthly average | report only (ft) (alert, not enforceable) | all year | LA2 |
| Depth of pond or reservoir in feet | monthly average | report only (ft) (alert, not enforceable) | all year | LA2 |
Cited limits by parameter: Washington's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/WA0023604 · MCP: https://passage-data.com/mcp