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Federal facility (National Security), major discharger, Mcalester, Oklahoma. NPDES permit OK0000523 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 6 times (last July 2026), 21 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| July 2026 | 01S | E. coli, daily maximum | 750 CFU/100mL | ≤ 406 CFU/100mL | 85% |
| July 2026 | 01S | Solids, total suspended, daily maximum | 289.6 lb/d | ≤ 210.17 lb/d | 38% |
| July 2026 | 01S | Solids, total suspended, daily maximum | 80 mg/L | ≤ 45 mg/L | 78% |
| July 2026 | 01S | Solids, total suspended, monthly average | 143.4 lb/d | ≤ 140.11 lb/d | 2% |
| July 2026 | 01S | Solids, total suspended, monthly average | 41 mg/L | ≤ 30 mg/L | 37% |
| July 2026 | TX1 | Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum | 56 % | ≥ 100 % | 44% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Jun–Oct | 01S |
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 01S |
| pH | minimum | ≥ 6.5 SU | all year | 01S |
| pH | maximum | ≤ 9 SU | all year | 01S |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 01S |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 01S |
| Solids, total suspended | monthly average | ≤ 140.11 lb/d | all year | 01S |
| Solids, total suspended | daily maximum | ≤ 210.17 lb/d | all year | 01S |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 01S |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 01S |
| Oil & Grease | monthly average | ≤ 46.7 lb/d | all year | 01S |
| Oil & Grease | daily maximum | ≤ 70.06 lb/d | all year | 01S |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 01S |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Jun–Oct | 01S |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.5 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 01S |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3 mg/L | Jun–Oct | 01S |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 14.01 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 01S |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 9.34 lb/d | Jun–Oct | 01S |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21.02 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 01S |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.01 lb/d | Jun–Oct | 01S |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 01S |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 01S |
| Chlorine, total residual | instantaneous maximum | ≤ .099 mg/L | all year | 01S |
| E. coli | geometric mean | ≤ 126 CFU/100mL | May–Sep | 01S |
| E. coli | daily maximum | ≤ 406 CFU/100mL | May–Sep | 01S |
| Perchlorate [ClO4] | monthly average | report only (ug/L) | all year | 01S |
| Perchlorate [ClO4] | daily maximum | report only (ug/L) | all year | 01S |
| Perchlorate [ClO4] | monthly average | report only (lb/d) | all year | 01S |
| Perchlorate [ClO4] | daily maximum | report only (lb/d) | all year | 01S |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 01S |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 15 mg/L | all year | 01S |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 46.7 lb/d | all year | 01S |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 70.06 lb/d | all year | 01S |
| pH | minimum | report only (SU) | all year | 02A |
| pH | maximum | report only (SU) | all year | 02A |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 02A |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 02A |
| Trinitrotoluene [TNT], total | monthly average | report only (mg/L) | all year | 02A |
| Trinitrotoluene [TNT], total | daily maximum | report only (mg/L) | all year | 02A |
| Trinitrotoluene [TNT], total | monthly average | report only (lb/d) | all year | 02A |
| Trinitrotoluene [TNT], total | daily maximum | report only (lb/d) | all year | 02A |
| RDX, total | monthly average | report only (mg/L) | all year | 02A |
| RDX, total | daily maximum | report only (mg/L) | all year | 02A |
| RDX, total | monthly average | report only (lb/d) | all year | 02A |
| RDX, total | daily maximum | report only (lb/d) | all year | 02A |
| HMX | monthly average | report only (mg/L) | all year | 02A |
| HMX | daily maximum | report only (mg/L) | all year | 02A |
| HMX | monthly average | report only (lb/d) | all year | 02A |
| HMX | daily maximum | report only (lb/d) | all year | 02A |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 02B |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 02B |
| Perchlorate [ClO4] | monthly average | report only (ug/L) | all year | 02B |
| Perchlorate [ClO4] | daily maximum | report only (ug/L) | all year | 02B |
| Perchlorate [ClO4] | monthly average | report only (lb/d) | all year | 02B |
| Perchlorate [ClO4] | daily maximum | report only (lb/d) | all year | 02B |
| Trinitrotoluene [TNT], total | monthly average | report only (mg/L) | all year | 02B |
| Trinitrotoluene [TNT], total | daily maximum | report only (mg/L) | all year | 02B |
| Trinitrotoluene [TNT], total | monthly average | report only (lb/d) | all year | 02B |
| Trinitrotoluene [TNT], total | daily maximum | report only (lb/d) | all year | 02B |
| RDX, total | monthly average | report only (mg/L) | all year | 02B |
| RDX, total | daily maximum | report only (mg/L) | all year | 02B |
| RDX, total | monthly average | report only (lb/d) | all year | 02B |
| RDX, total | daily maximum | report only (lb/d) | all year | 02B |
| HMX | monthly average | report only (mg/L) | all year | 02B |
| HMX | daily maximum | report only (mg/L) | all year | 02B |
| HMX | monthly average | report only (lb/d) | all year | 02B |
| HMX | daily maximum | report only (lb/d) | all year | 02B |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 02C |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 02C |
| 2,4-Dinitroanisole | monthly average | report only (mg/L) | all year | 02C |
| 2,4-Dinitroanisole | daily maximum | report only (mg/L) | all year | 02C |
| Nitroguanidine | monthly average | report only (mg/L) | all year | 02C |
| Nitroguanidine | daily maximum | report only (mg/L) | all year | 02C |
| pH | daily minimum | report only (SU) | all year | TX1 |
| pH | daily maximum | report only (SU) | all year | TX1 |
| Nitrogen, ammonia total [as N] | daily minimum | report only (mg/L) | all year | TX1 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | TX1 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | TX1 |
| Whole Effluent Toxicity [WET] - C. dubia | 7-day minimum | ≥ 100 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - P. promelas | 7-day minimum | ≥ 100 % | all year | TX1 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| %Mortality 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| %Mortality Static Renewal 7Day Chronic Pimephales Promelas | 7-day minimum | report only (%) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
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/OK0000523 · MCP: https://passage-data.com/mcp