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Sewage treatment plant, Winthrop, Washington. NPDES permit WA0020885 expired Jul 31, 2020; its limits still apply. Last 12 months: over a limit 3 times (last April 2026), 94 required values missing, 11 of 25 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | BOD, percent removal [total], monthly average minimum | 66 | ≥ 79 % | 62% |
| January 2026 | Solids, suspended percent removal, monthly average minimum | 29 | ≥ 77 % | 209% |
| April 2026 | Solids, suspended percent removal, monthly average minimum | 67 | ≥ 77 % | 43% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | all year | EFFL |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | all year | EFFL |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | EFFL |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | EFFL |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) (alert, not enforceable) | all year | EFFL |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) (alert, not enforceable) | all year | EFFL |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) (alert, not enforceable) | all year | EFFL |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) (alert, not enforceable) | all year | EFFL |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) | all year | EFFL |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | EFFL |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | EFFL |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) | all year | EFFL |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 70 lb/d | all year | EFFL |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 70 lb/d | all year | EFFL |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | all year | EFFL |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | all year | EFFL |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 70 lb/d | all year | EFFL |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 105 lb/d | all year | EFFL |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 105 lb/d | all year | EFFL |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 105 lb/d | all year | EFFL |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 105 lb/d | all year | EFFL |
| pH | daily minimum | ≥ 6 SU | all year | EFFL |
| pH | daily minimum | ≥ 6 SU | all year | EFFL |
| pH | daily maximum | ≤ 9 SU | all year | EFFL |
| pH | daily maximum | ≤ 9 SU | all year | EFFL |
| Solids, total suspended | maximum | report only (mg/L) | all year | EFFL |
| Solids, total suspended | monthly average | ≤ 56 mg/L | all year | EFFL |
| Solids, total suspended | weekly average | ≤ 84 mg/L | all year | EFFL |
| Solids, total suspended | maximum | report only (lb/d) | all year | EFFL |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | all year | EFFL |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | all year | EFFL |
| Solids, total suspended | monthly average | ≤ 140 lb/d | all year | EFFL |
| Solids, total suspended | monthly average | ≤ 140 lb/d | all year | EFFL |
| Solids, total suspended | monthly average | ≤ 140 lb/d | all year | EFFL |
| Solids, total suspended | weekly average | ≤ 210 lb/d | all year | EFFL |
| Solids, total suspended | weekly average | ≤ 210 lb/d | all year | EFFL |
| Solids, total suspended | weekly average | ≤ 210 lb/d | all year | EFFL |
| Solids, total suspended | weekly average | ≤ 210 lb/d | all year | EFFL |
| Oil and grease, hexane extr method | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Oil and grease, hexane extr method | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) (alert, not enforceable) | all year | EFFL |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) (alert, not enforceable) | all year | EFFL |
| Nitrogen, Kjeldahl, total [as N] | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Nitrogen, Kjeldahl, total [as N] | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Nitrite + Nitrate total [as N] | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Nitrite + Nitrate total [as N] | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Phosphorus, total [as P] | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Phosphorus, total [as P] | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Hardness, total [as CaCO3] | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Hardness, total [as CaCO3] | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Chlorine, total residual | monthly average | ≤ .12 mg/L | all year | EFFL |
| Chlorine, total residual | monthly average | ≤ .12 mg/L | all year | EFFL |
| Chlorine, total residual | monthly average | ≤ .3 lb/d | all year | EFFL |
| Chlorine, total residual | monthly average | ≤ .3 lb/d | all year | EFFL |
| Chlorine, total residual | monthly average | ≤ .3 lb/d | all year | EFFL |
| BOD, percent removal [total] | monthly average minimum | ≥ 79 % | all year | EFFL |
| BOD, percent removal [total] | monthly average minimum | ≥ 79 % | all year | EFFL |
| Solids, total dissolved | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Solids, total dissolved | single reading | report only (mg/L) (alert, not enforceable) | Sep–Dec | EFFL |
| Coliform, fecal general | monthly geometric mean | ≤ 100 #/100mL | all year | EFFL |
| Coliform, fecal general | monthly geometric mean | ≤ 100 #/100mL | all year | EFFL |
| Coliform, fecal general | weekly geometric mean | ≤ 200 #/100mL | all year | EFFL |
| Coliform, fecal general | weekly geometric mean | ≤ 200 #/100mL | all year | EFFL |
| Flow | maximum | report only (MGD) (alert, not enforceable) | all year | EFFL |
| Flow | maximum | report only (MGD) (alert, not enforceable) | all year | EFFL |
| Flow | monthly average | report only (MGD) (alert, not enforceable) | all year | EFFL |
| Flow | monthly average | report only (MGD) (alert, not enforceable) | all year | EFFL |
| Flow | monthly total | report only (MGD) (alert, not enforceable) | all year | EFFL |
| Flow | monthly total | report only (MGD) (alert, not enforceable) | all year | EFFL |
| Solids, suspended percent removal | monthly average minimum | ≥ 77 % | all year | EFFL |
| Solids, suspended percent removal | monthly average minimum | ≥ 77 % | all year | EFFL |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | all year | INFL |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | all year | INFL |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | INFL |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | INFL |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) (alert, not enforceable) | all year | INFL |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) (alert, not enforceable) | all year | INFL |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) (alert, not enforceable) | all year | INFL |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) (alert, not enforceable) | all year | INFL |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) (alert, not enforceable) | all year | INFL |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) (alert, not enforceable) | all year | INFL |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) (alert, not enforceable) | all year | INFL |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) (alert, not enforceable) | all year | INFL |
| BOD, 5-day, 20 deg. C | average | report only (lb/d) (alert, not enforceable) | all year | INFL |
| BOD, 5-day, 20 deg. C | average | report only (lb/d) (alert, not enforceable) | all year | INFL |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | all year | INFL |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | all year | INFL |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | INFL |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | INFL |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | INFL |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | INFL |
| Solids, total suspended | maximum | report only (mg/L) (alert, not enforceable) | all year | INFL |
| Solids, total suspended | maximum | report only (mg/L) (alert, not enforceable) | all year | INFL |
| Solids, total suspended | monthly average | report only (mg/L) (alert, not enforceable) | all year | INFL |
| Solids, total suspended | monthly average | report only (mg/L) (alert, not enforceable) | all year | INFL |
| Solids, total suspended | average | report only (lb/d) (alert, not enforceable) | all year | INFL |
| Solids, total suspended | average | report only (lb/d) (alert, not enforceable) | all year | INFL |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | all year | INFL |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | all year | INFL |
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/WA0020885 · MCP: https://passage-data.com/mcp