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Sewage treatment plant, Carbonado, Washington. NPDES permit WA0020834 expired Nov 30, 2022; its limits still apply. Last 12 months: over a limit 6 times (last July 2026), 9 of 37 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| May 2026 | BOD, 5-day, 20 deg. C, average | 31.175 | ≤ 30 mg/L | 4% |
| May 2026 | BOD, 5-day, 20 deg. C, weekly average | 53.3 | ≤ 45 mg/L | 18% |
| June 2026 | BOD, 5-day, 20 deg. C, average | 34.875 | ≤ 30 mg/L | 16% |
| June 2026 | BOD, 5-day, 20 deg. C, weekly average | 45.9 | ≤ 45 mg/L | 2% |
| July 2026 | BOD, 5-day, 20 deg. C, average | 37.46 | ≤ 30 mg/L | 25% |
| July 2026 | BOD, 5-day, 20 deg. C, weekly average | 72.8 | ≤ 45 mg/L | 62% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | average | report only (deg C) (alert, not enforceable) | all year | 001 |
| Temperature, water deg. centigrade | average | report only (deg C) (alert, not enforceable) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) (alert, not enforceable) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) (alert, not enforceable) | all year | 001 |
| BOD, 5-day, 20 deg. C | average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 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 | average | ≤ 16 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | average | ≤ 16 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 26 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 26 lb/d | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | average | ≤ 65 mg/L | all year | 001 |
| Solids, total suspended | average | ≤ 65 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 86 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 86 mg/L | all year | 001 |
| Solids, total suspended | average | ≤ 35 lb/d | all year | 001 |
| Solids, total suspended | average | ≤ 35 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 53 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 53 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | average | report only (lb/d) (alert, not enforceable) | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | average | report only (lb/d) (alert, not enforceable) | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | average | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | average | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, nitrate total [as N] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, nitrate total [as N] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Phosphate, total [as PO4] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Phosphate, total [as PO4] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, total [as P] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, total [as P] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Chlorine, total residual | average | ≤ .3 mg/L | all year | 001 |
| Chlorine, total residual | average | ≤ .3 mg/L | all year | 001 |
| Chlorine, total residual | weekly average | ≤ .7 mg/L | all year | 001 |
| Chlorine, total residual | weekly average | ≤ .7 mg/L | 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 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year | 001 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year | 001 |
| Coliform, fecal general | weekly geometric mean | ≤ 400 #/100mL | all year | 001 |
| Coliform, fecal general | weekly geometric mean | ≤ 400 #/100mL | 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 |
| 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 |
| Rainfall | average | report only (in) (alert, not enforceable) | all year | RAIN |
| Rainfall | average | report only (in) (alert, not enforceable) | all year | RAIN |
| Rainfall | total | report only (in) (alert, not enforceable) | all year | RAIN |
| Rainfall | total | report only (in) (alert, not enforceable) | all year | RAIN |
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/WA0020834 · MCP: https://passage-data.com/mcp