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Sewerage Systems, Harrah, Oklahoma. NPDES permit OK0044733, in force until Jul 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 4 mg/L | all year |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 4 mg/L | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 12.5 lb/d | all year |
| Solids, total suspended | 30-day average | ≤ 12.5 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 18.8 lb/d | all year |
| Solids, total suspended | 7-day average | ≤ 18.8 lb/d | all year |
| Solids, total suspended | 30-day average | report only (mg/L) | all year |
| Solids, total suspended | 30-day average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2 mg/L | Jun–Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2 mg/L | Jun–Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 3 mg/L | Jun–Oct |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 3 mg/L | Jun–Oct |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 9 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 9 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .8 lb/d | Jun–Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ .8 lb/d | Jun–Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.5 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.5 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.25 lb/d | Jun–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.25 lb/d | Jun–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.75 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.75 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | instantaneous maximum | < 19 ug/L | all year |
| Chlorine, total residual | instantaneous maximum | < 19 ug/L | all year |
| E. coli | 30-day geometric mean | ≤ 126 CFU/100mL | all year |
| E. coli | 30-day geometric mean | ≤ 126 CFU/100mL | all year |
| E. coli | daily maximum | ≤ 406 CFU/100mL | all year |
| E. coli | daily maximum | ≤ 406 CFU/100mL | all year |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 18 mg/L | Jan, Feb, Mar, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 18 mg/L | Jan, Feb, Mar, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 12 mg/L | Apr, May |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 12 mg/L | Apr, May |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 10 mg/L | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 10 mg/L | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 27 mg/L | Jan, Feb, Mar, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 27 mg/L | Jan, Feb, Mar, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 18 mg/L | Apr, May |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 18 mg/L | Apr, May |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 15 mg/L | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 15 mg/L | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 7.5 lb/d | Jan, Feb, Mar, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 7.5 lb/d | Jan, Feb, Mar, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 5 lb/d | Apr, May |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 5 lb/d | Apr, May |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 4.2 lb/d | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 4.2 lb/d | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 11.3 lb/d | Jan, Feb, Mar, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 11.3 lb/d | Jan, Feb, Mar, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 7.5 lb/d | Apr, May |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 7.5 lb/d | Apr, May |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 6.3 lb/d | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 6.3 lb/d | Jun–Oct |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | report only (mg/L) | all year |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | report only (mg/L) | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
| Carbonaceous oxygen demand, % removal | monthly average minimum | ≥ 85 % | all year |
| Carbonaceous oxygen demand, % removal | monthly average minimum | ≥ 85 % | all year |
Cited limits by parameter: Oklahoma'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/OK0044733 · MCP: https://passage-data.com/mcp