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Sewage treatment plant, major discharger, Newcastle, Oklahoma. NPDES permit OK0028614, in force until Mar 31, 2027. Last 12 months: over a limit 2 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| August 2026 | pH, minimum | 6 SU | ≥ 6.5 SU | — |
| September 2026 | E. coli, daily maximum | 19990 MPN/100mL | ≤ 406 MPN/100mL | 4824% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 375.3 lb/d | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.1 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 9.9 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 51.3 lb/d | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| E. coli | geometric mean | ≤ 126 MPN/100mL | May–Sep | 002 |
| E. coli | daily maximum | ≤ 406 MPN/100mL | May–Sep | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 18 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 27 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 225.2 lb/d | all year | 002 |
| pH | minimum | report only (SU) | all year | TX2 |
| pH | maximum | report only (SU) | all year | TX2 |
| Nitrogen, ammonia total [as N] | daily minimum | report only (mg/L) | all year | TX2 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | TX2 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | TX2 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| %Mortality 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX2 |
| %Mortality Static Renewal 7Day Chronic Pimephales Promelas | 7-day minimum | report only (%) | all year | TX2 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX2 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX2 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX2 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX2 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX2 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX2 |
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/OK0028614 · MCP: https://passage-data.com/mcp