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Sewage treatment plant, major discharger, Pullman, Washington. NPDES permit WA0044652 expired May 31, 2019; its limits still apply. Last 12 months: no values over a limit, 149 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | minimum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Oxygen, dissolved [DO] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Oxygen, dissolved [DO] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 28.5 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 28.5 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 1227 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 1227 lb/d | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 8.5 SU | all year | 001 |
| pH | daily maximum | ≤ 8.5 SU | 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 | weekly average | ≤ 1951 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 1951 lb/d | all year | 001 |
| Nitrogen, total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, total [as N] | monthly average | 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 (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum | ≤ 71 lb/d | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum | ≤ 71 lb/d | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum | ≤ 170 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum | ≤ 170 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 28 lb/d | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 28 lb/d | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 68 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 68 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrite + Nitrate total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrite + Nitrate total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, total [as P] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, total [as P] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, dissolved reactive [drp as P] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, dissolved reactive [drp as P] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, dissolved reactive [drp as P] | monthly average | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Phosphorus, dissolved reactive [drp as P] | monthly average | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Hardness, total [as CaCO3] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Hardness, total [as CaCO3] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Arsenic, total [as As] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Arsenic, total [as As] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Cadmium, total [as Cd] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Cadmium, total [as Cd] | maximum | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Chromium, total [as Cr] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Chromium, total [as Cr] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Copper, total [as Cu] | maximum | ≤ 27.6 ug/L | all year | 001 |
| Copper, total [as Cu] | maximum | ≤ 27.6 ug/L | all year | 001 |
| Lead, total [as Pb] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Lead, total [as Pb] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Nickel, total [as Ni] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Nickel, total [as Ni] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Silver, total [as Ag] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Silver, total [as Ag] | 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 |
| Dichlorobromomethane | maximum | ≤ 1.22 ug/L | all year | 001 |
| Dichlorobromomethane | monthly average | ≤ .84 ug/L | all year | 001 |
| Chloroform | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Di[2-ethylhexyl] phthalate [DEHP] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Di[2-ethylhexyl] phthalate [DEHP] | maximum | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Chlorine, free available | monthly average | ≤ 7 ug/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 |
| Mercury, total [as Hg] | maximum | ≤ .23 ug/L | all year | 001 |
| Mercury, total [as Hg] | maximum | ≤ .23 ug/L | all year | 001 |
| Mercury, total [as Hg] | monthly average | ≤ .16 ug/L | all year | 001 |
| Mercury, total [as Hg] | monthly average | ≤ .16 ug/L | all year | 001 |
| Coliform, fecal general | weekly geometric mean | ≤ 100 #/100mL | 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 minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| 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 (mg/L) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | Jun, Jul | IN1 |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | Jun, Jul | IN1 |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, Oct, Nov, Dec | IN1 |
| BOD, 5-day, 20 deg. C | maximum | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, Oct, Nov, Dec | IN1 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) (alert, not enforceable) | Jun, Jul | IN1 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) (alert, not enforceable) | Jun, Jul | IN1 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, Oct, Nov, Dec | IN1 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, Oct, Nov, Dec | IN1 |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | IN1 |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | IN1 |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | IN1 |
| pH | minimum | report only (SU) (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 (mg/L) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | monthly average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | monthly average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | monthly average | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | Jun, Jul | IN1 |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | Jun, Jul | IN1 |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, Oct, Nov, Dec | IN1 |
| Solids, total suspended | maximum | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, Oct, Nov, Dec | IN1 |
| Solids, total suspended | monthly average | report only (lb/d) (alert, not enforceable) | Jun, Jul | IN1 |
| Solids, total suspended | monthly average | report only (lb/d) (alert, not enforceable) | Jun, Jul | IN1 |
| Solids, total suspended | monthly average | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, Oct, Nov, Dec | IN1 |
| Solids, total suspended | monthly average | report only (lb/d) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, Oct, Nov, Dec | IN1 |
| Arsenic, total [as As] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Arsenic, total [as As] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Cadmium, total [as Cd] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Cadmium, total [as Cd] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Chromium, total [as Cr] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Chromium, total [as Cr] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Copper, total [as Cu] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Copper, total [as Cu] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Lead, total [as Pb] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Lead, total [as Pb] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Nickel, total [as Ni] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Nickel, total [as Ni] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Silver, total [as Ag] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Silver, total [as Ag] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Zinc, total [as Zn] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Zinc, total [as Zn] | maximum | report only (ug/L) (alert, not enforceable) | all year | IN1 |
| Mercury, total [as Hg] | maximum | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Mercury, total [as Hg] | maximum | report only (mg/L) (alert, not enforceable) | all year | IN1 |
| Flow | maximum | report only (MGD) (alert, not enforceable) | Jun, Jul | IN1 |
| Flow | maximum | report only (MGD) (alert, not enforceable) | Jun, Jul | IN1 |
| Flow | maximum | report only (MGD) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, Oct, Nov, Dec | IN1 |
| Flow | maximum | report only (MGD) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, Oct, Nov, Dec | IN1 |
| Flow | monthly average | report only (MGD) (alert, not enforceable) | Jun, Jul | IN1 |
| Flow | monthly average | report only (MGD) (alert, not enforceable) | Jun, Jul | IN1 |
| Flow | monthly average | report only (MGD) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, Oct, Nov, Dec | IN1 |
| Flow | monthly average | report only (MGD) (alert, not enforceable) | Jan, Feb, Mar, Apr, May, Aug, Sep, 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/WA0044652 · MCP: https://passage-data.com/mcp