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Sewage treatment plant, Davenport, Washington. NPDES permit WA0045578 expired Jul 31, 2019; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Conductivity | maximum | report only (umho/cm) (alert, not enforceable) | all year | 001 |
| Conductivity | maximum | report only (umho/cm) (alert, not enforceable) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | all year | 001 |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | 001 |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | 001 |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | 001 |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | 001 |
| Solids, fixed dissolved | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Solids, fixed dissolved | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Solids, fixed dissolved | maximum | report only (lb/d) (alert, not enforceable) | all year | 001 |
| Solids, fixed dissolved | maximum | report only (lb/d) (alert, not enforceable) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | all year | 001 |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum | report only (lb/d) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum | report only (lb/d) (alert, not enforceable) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | maximum | report only (lb/d) (alert, not enforceable) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | maximum | report only (lb/d) (alert, not enforceable) | all year | 001 |
| BOD, percent removal [total] | monthly average | report only (%) (alert, not enforceable) | all year | 001 |
| BOD, percent removal [total] | monthly average | report only (%) (alert, not enforceable) | all year | 001 |
| Coliform, fecal general | maximum | report only (#/100mL) (alert, not enforceable) | all year | 001 |
| Coliform, fecal general | maximum | report only (#/100mL) (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 | monthly average | report only (MGD) (alert, not enforceable) | all year | 001 |
| Flow | monthly average | report only (MGD) (alert, not enforceable) | all year | 001 |
| Solids, suspended percent removal | monthly average | report only (%) (alert, not enforceable) | all year | 001 |
| Solids, suspended percent removal | monthly average | report only (%) (alert, not enforceable) | all year | 001 |
| Sodium adsorption ratio | single reading | report only (Ratio) (alert, not enforceable) | all year | 001A |
| Sodium adsorption ratio | single reading | report only (Ratio) (alert, not enforceable) | all year | 001A |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | all year | 002 |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | all year | 002 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | 002 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | 002 |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) (alert, not enforceable) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 45 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 45 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) (alert, not enforceable) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) (alert, not enforceable) | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Alkalinity, total [as CaCO3] | maximum | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Alkalinity, total [as CaCO3] | maximum | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Alkalinity, total [as CaCO3] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Alkalinity, total [as CaCO3] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Solids, total suspended | monthly average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | monthly average | report only (lb/d) (alert, not enforceable) | all year | 002 |
| Solids, total suspended | monthly average | report only (lb/d) (alert, not enforceable) | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 9.6 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 9.6 mg/L | all year | 002 |
| Chlorine, total residual | monthly average | ≤ 24.5 mg/L | all year | 002 |
| Chlorine, total residual | monthly average | ≤ 24.5 mg/L | all year | 002 |
| Coliform, fecal general | monthly average | ≤ 200 #/100mL | all year | 002 |
| Coliform, fecal general | monthly average | ≤ 200 #/100mL | all year | 002 |
| Flow | maximum | report only (gal/d) (alert, not enforceable) | all year | 002 |
| Flow | maximum | report only (gal/d) (alert, not enforceable) | all year | 002 |
| Flow | monthly average | report only (gal/d) (alert, not enforceable) | all year | 002 |
| Flow | monthly average | report only (gal/d) (alert, not enforceable) | all year | 002 |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | all year | 003 |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | all year | 003 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | 003 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | 003 |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | 003 |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | 003 |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | 003 |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | 003 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | 003 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 003 |
| Flow | maximum | report only (cfs) (alert, not enforceable) | all year | 003 |
| Flow | maximum | report only (cfs) (alert, not enforceable) | all year | 003 |
| Flow | monthly average | report only (cfs) (alert, not enforceable) | all year | 003 |
| Flow | monthly average | report only (cfs) (alert, not enforceable) | all year | 003 |
| 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 | 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 |
| 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 | 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 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Nitrogen, ammonia total [as N] | maximum | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Nitrogen, ammonia total [as N] | maximum | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Nitrogen, Kjeldahl, total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Nitrogen, Kjeldahl, total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Nitrogen, Kjeldahl, total [as N] | maximum | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Nitrogen, Kjeldahl, total [as N] | maximum | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Rainfall | maximum | report only (in) (alert, not enforceable) | all year | IN1 |
| Rainfall | maximum | report only (in) (alert, not enforceable) | all year | IN1 |
| Rainfall | monthly average | report only (in) (alert, not enforceable) | all year | IN1 |
| Rainfall | monthly average | report only (in) (alert, not enforceable) | all year | IN1 |
| Flow | maximum | report only (gal/d) (alert, not enforceable) | May–Sep | IN1 |
| Flow | maximum | report only (gal/d) (alert, not enforceable) | May–Sep | IN1 |
| Flow | maximum | report only (gal/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | IN1 |
| Flow | maximum | report only (gal/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | IN1 |
| Flow | monthly average | report only (gal/d) (alert, not enforceable) | May–Sep | IN1 |
| Flow | monthly average | report only (gal/d) (alert, not enforceable) | May–Sep | IN1 |
| Flow | monthly average | report only (gal/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | IN1 |
| Flow | monthly average | report only (gal/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | IN1 |
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/WA0045578 · MCP: https://passage-data.com/mcp