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Sewage treatment plant, major discharger, Salem, Oregon. NPDES permit OR0026409 expired Oct 31, 2009; 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 | daily maximum | report only (deg C) | all year | 001 |
| Oxygen, dissolved [DO] | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 37 mg/L | Jun–Oct | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jun–Oct | 001 |
| Solids, total suspended | monthly average | ≤ 11000 lb/d | Jun–Oct | 001 |
| Solids, total suspended | weekly average | ≤ 13000 lb/d | Jun–Oct | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 15000 lb/d | Jun–Oct | 001 |
| Solids, total suspended | daily maximum | ≤ 26000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | Jun–Oct | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 16000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 23000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 23000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 34000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 28000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Solids, total suspended | weekly average | ≤ 41000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | May–Oct | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | May–Oct | 001 |
| Phosphate, total [as PO4] | monthly average | report only (mg/L) | May–Oct | 001 |
| Flow, in conduit or thru treatment plant | total | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Chlorine, total residual | monthly average | ≤ .1 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .23 mg/L | all year | 001 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 406 #/100mL | all year | 001 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | all year | 001 |
| E. coli | daily maximum | report only (#/100mL) | all year | 001 |
| pH, maximum | daily maximum | ≤ 9 SU | all year | 001 |
| pH, maximum | daily maximum | report only (SU) | all year | 001 |
| pH, minimum | daily minimum | ≥ 6 SU | all year | 001 |
| pH, minimum | daily minimum | report only (SU) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 32 mg/L | Jun–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | Jun–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 9300 lb/d | Jun–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 12000 lb/d | Jun–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 14000 lb/d | Jun–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 26000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (lb/d) | Jun–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 13000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 19000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 19000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 28000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 23000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 34000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 78 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 72 % | all year | 001 |
| Chlorine usage | monthly average | report only (lb/d) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Solids, total suspended | monthly average | ≤ 13000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Solids, total suspended | monthly average | ≤ 13000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Solids, total suspended | daily maximum | ≤ 25000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Solids, total suspended | daily maximum | ≤ 25000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Solids, total suspended | weekly average | ≤ 19000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Solids, total suspended | weekly average | ≤ 19000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Ultraviolet light intensity | monthly average | report only (mW/cm2) | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Ultraviolet light intensity | monthly average | report only (mW/cm2) | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| E. coli | daily maximum | ≤ 406 #/100mL | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| E. coli | daily maximum | ≤ 406 #/100mL | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| E. coli | daily maximum | report only (#/100mL) | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| E. coli | daily maximum | report only (#/100mL) | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| pH, maximum | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| pH, maximum | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| pH, minimum | daily minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, May, Aug, Nov, Dec | 002 |
| pH, minimum | daily minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 21000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 21000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 16000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 16000 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
Cited limits by parameter: Oregon's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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