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Sewage treatment plant, Granite Falls, Washington. NPDES permit WA0021130 expired Jul 31, 2025; its limits still apply. Last 12 months: over a limit 6 times (last January 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Solids, suspended percent removal, monthly average minimum | 82 | ≥ 85 % | 20% |
| December 2025 | Solids, total suspended, average | 34.3 | ≤ 30 mg/L | 14% |
| December 2025 | Solids, total suspended, weekly average | 47.7 | ≤ 45 mg/L | 6% |
| January 2026 | Solids, suspended percent removal, monthly average minimum | 81 | ≥ 85 % | 27% |
| January 2026 | Solids, total suspended, average | 34.4 | ≤ 30 mg/L | 15% |
| January 2026 | Solids, total suspended, weekly average | 60 | ≤ 45 mg/L | 33% |
| 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 |
| 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 | ≤ 139 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | average | ≤ 139 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 208 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 208 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 |
| Alkalinity, total [as CaCO3] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Alkalinity, total [as CaCO3] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Solids, total suspended | average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | 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 | average | ≤ 139 lb/d | all year | 001 |
| Solids, total suspended | average | ≤ 139 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 208 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 208 lb/d | all year | 001 |
| Oil and grease, hexane extr method | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Oil and grease, hexane extr method | 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, 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 |
| Nitrite + Nitrate total [as N] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrite + Nitrate total [as N] | 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 |
| Phosphorus, dissolved reactive [drp as P] | average | report only (mg/L) (alert, not enforceable) | Jun–Sep | 001 |
| Phosphorus, dissolved reactive [drp as P] | average | report only (mg/L) (alert, not enforceable) | Jun–Sep | 001 |
| Hardness, total [as CaCO3] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Hardness, total [as CaCO3] | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Copper, total [as Cu] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Copper, total [as Cu] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Zinc, total [as Zn] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Zinc, total [as Zn] | maximum | report only (ug/L) (alert, not enforceable) | 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 |
| Solids, total dissolved | average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Solids, total dissolved | average | report only (mg/L) (alert, not enforceable) | 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 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | May–Sep | 001A |
| Temperature, water deg. centigrade | maximum | report only (deg C) (alert, not enforceable) | May–Sep | 001A |
| BOD, 5-day, 20 deg. C | average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | average | 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 (mg/L) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | average | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | average | 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 | maximum | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | average | 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 (mg/L) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | average | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | average | 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 | maximum | report only (lb/d) (alert, not enforceable) | all year | IN1 |
| Flow | average | report only (MGD) (alert, not enforceable) | all year | IN1 |
| Flow | average | report only (MGD) (alert, not enforceable) | all year | IN1 |
| Flow | maximum | report only (MGD) (alert, not enforceable) | all year | IN1 |
| Flow | maximum | report only (MGD) (alert, not enforceable) | all year | 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/WA0021130 · MCP: https://passage-data.com/mcp