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Sewage treatment plant, major discharger, Ellensburg, Washington. NPDES permit WA0024341 expired Dec 31, 2023; 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 | 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 |
| Oxygen, dissolved [DO] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Oxygen, dissolved [DO] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Oxygen, dissolved [DO] | maximum | 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] | minimum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 1500 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 1500 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 2250 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 2250 lb/d | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1200 lb/d | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1200 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 1800 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 1800 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.2 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.2 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 547 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 547 lb/d | all year | 001 |
| Hardness, total [as CaCO3] | single reading | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Hardness, total [as CaCO3] | single reading | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Lead, total [as Pb] | single reading | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Lead, total [as Pb] | single reading | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Fecal coliform, MPN, EC med, 44.5 C | monthly geometric mean | ≤ 100 #/100mL | all year | 001 |
| Fecal coliform, MPN, EC med, 44.5 C | monthly geometric mean | ≤ 100 #/100mL | all year | 001 |
| Fecal coliform, MPN, EC med, 44.5 C | weekly geometric mean | ≤ 200 #/100mL | all year | 001 |
| Fecal coliform, MPN, EC med, 44.5 C | weekly geometric mean | ≤ 200 #/100mL | all year | 001 |
| BOD, percent removal [total] | monthly average minimum | ≥ 85 % | all year | 001 |
| BOD, percent removal [total] | monthly average minimum | ≥ 85 % | all year | 001 |
| Flow | average | report only (MGD) (alert, not enforceable) | all year | 001 |
| Flow | average | report only (MGD) (alert, not enforceable) | all year | 001 |
| Flow | maximum | report only (MGD) (alert, not enforceable) | all year | 001 |
| Flow | maximum | report only (MGD) (alert, not enforceable) | all year | 001 |
| Flow | total | report only (MGD) (alert, not enforceable) | all year | 001 |
| Flow | total | report only (MGD) (alert, not enforceable) | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| BOD, 5-day, 20 deg. C | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| BOD, 5-day, 20 deg. C | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Solids, total suspended | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Solids, total suspended | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Fecal coliform, MPN, EC med, 44.5 C | single reading | report only (#/100mL) (alert, not enforceable) | all year | 002 |
| Fecal coliform, MPN, EC med, 44.5 C | single reading | report only (#/100mL) (alert, not enforceable) | all year | 002 |
| Flow, total | single reading | report only (gal) (alert, not enforceable) | all year | 002 |
| Flow, total | single reading | report only (gal) (alert, not enforceable) | all year | 002 |
| BOD, 5-day, 20 deg. C | average | report only (mg/L) (alert, not enforceable) | all year | INF |
| BOD, 5-day, 20 deg. C | average | report only (mg/L) (alert, not enforceable) | all year | INF |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) (alert, not enforceable) | all year | INF |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) (alert, not enforceable) | all year | INF |
| BOD, 5-day, 20 deg. C | average | report only (lb/d) (alert, not enforceable) | all year | INF |
| BOD, 5-day, 20 deg. C | average | report only (lb/d) (alert, not enforceable) | all year | INF |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | all year | INF |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | all year | INF |
| Solids, total suspended | average | report only (mg/L) (alert, not enforceable) | all year | INF |
| Solids, total suspended | average | report only (mg/L) (alert, not enforceable) | all year | INF |
| Solids, total suspended | maximum | report only (mg/L) (alert, not enforceable) | all year | INF |
| Solids, total suspended | maximum | report only (mg/L) (alert, not enforceable) | all year | INF |
| Solids, total suspended | average | report only (lb/d) (alert, not enforceable) | all year | INF |
| Solids, total suspended | average | report only (lb/d) (alert, not enforceable) | all year | INF |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | all year | INF |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | all year | INF |
| Flow | average | report only (MGD) (alert, not enforceable) | all year | INF |
| Flow | average | report only (MGD) (alert, not enforceable) | all year | INF |
| Flow | maximum | report only (MGD) (alert, not enforceable) | all year | INF |
| Flow | maximum | report only (MGD) (alert, not enforceable) | all year | INF |
| Flow | total | report only (MGD) (alert, not enforceable) | all year | INF |
| Flow | total | report only (MGD) (alert, not enforceable) | all year | INF |
Cited limits by parameter: Washington'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/WA0024341 · MCP: https://passage-data.com/mcp