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Sewage treatment plant, major discharger, Center, Texas. NPDES permit TX0076953, in force until Apr 4, 2027. Last 12 months: over a limit 5 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | Flow, in conduit or thru treatment plant, 2-hour peak | 3464 gal/min | ≤ 3056 gal/min | 13% |
| July 2026 | Flow, in conduit or thru treatment plant, 2-hour peak | 3129 gal/min | ≤ 3056 gal/min | 2% |
| July 2026 | Mercury, total [as Hg], daily average | .0000892 mg/L | ≤ .0000279 mg/L | 220% |
| July 2026 | Mercury, total [as Hg], daily average | .0012052 lb/d | ≤ .0004 lb/d | 201% |
| July 2026 | Mercury, total [as Hg], daily maximum | .0000892 mg/L | ≤ .000056 mg/L | 59% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | monthly minimum | ≥ 6 mg/L | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily average | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | daily average | ≤ 295 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 3 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 44 lb/d | all year | 001 |
| Copper, total [as Cu] | daily average | ≤ .0078 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .0165 mg/L | all year | 001 |
| Copper, total [as Cu] | daily average | ≤ .12 lb/d | all year | 001 |
| Zinc, total [as Zn] | daily average | ≤ .0812 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .171 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily average | ≤ 1.2 lb/d | all year | 001 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | 2-hour peak | ≤ 3056 gal/min | all year | 001 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 1.77 MGD | all year | 001 |
| Chlorine, total residual | instantaneous maximum | < .1 mg/L | all year | 001 |
| Chlorine, total residual | monthly minimum | ≥ 1 mg/L | all year | 001 |
| E. coli | daily average | ≤ 126 CFU/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 399 CFU/100mL | all year | 001 |
| Mercury, total [as Hg] | daily average | ≤ .0000279 mg/L | all year | 001 |
| Mercury, total [as Hg] | daily maximum | ≤ .000056 mg/L | all year | 001 |
| Mercury, total [as Hg] | daily average | ≤ .0004 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 20 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 45 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 295 lb/d | all year | 001 |
| Oxygen, dissolved [DO] | monthly minimum | ≥ 6 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | daily average | ≤ 12 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 40 mg/L | all year | 002 |
| Solids, total suspended | daily average | ≤ 177 lb/d | all year | 002 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 2 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 30 lb/d | all year | 002 |
| Copper, total [as Cu] | daily average | ≤ .0078 mg/L | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ .0165 mg/L | all year | 002 |
| Copper, total [as Cu] | daily average | ≤ .12 lb/d | all year | 002 |
| Zinc, total [as Zn] | daily average | ≤ .0812 mg/L | all year | 002 |
| Zinc, total [as Zn] | daily maximum | ≤ .171 mg/L | all year | 002 |
| Zinc, total [as Zn] | daily average | ≤ 1.2 lb/d | all year | 002 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | 2-hour peak | ≤ 3056 gal/min | all year | 002 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 1.77 MGD | all year | 002 |
| Chlorine, total residual | instantaneous maximum | < .1 mg/L | all year | 002 |
| Chlorine, total residual | monthly minimum | ≥ 1 mg/L | all year | 002 |
| E. coli | daily average | ≤ 126 CFU/100mL | all year | 002 |
| E. coli | daily maximum | ≤ 399 CFU/100mL | all year | 002 |
| Mercury, total [as Hg] | daily average | ≤ .0000279 mg/L | all year | 002 |
| Mercury, total [as Hg] | daily maximum | ≤ .000056 mg/L | all year | 002 |
| Mercury, total [as Hg] | daily average | ≤ .0004 lb/d | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 5 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 20 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 74 lb/d | all year | 002 |
| Solids, total suspended | daily average | ≤ 295 lb/d | all year | 003 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 44 lb/d | all year | 003 |
| Copper, total [as Cu] | daily average | ≤ .17 lb/d | all year | 003 |
| Zinc, total [as Zn] | daily average | ≤ 1.3 lb/d | all year | 003 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 1.77 MGD | all year | 003 |
| Mercury, total [as Hg] | daily average | ≤ .0004 lb/d | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 295 lb/d | all year | 003 |
| Whole effluent toxicity | 7-day minimum | ≥ 67 % | all year | TX1 |
| Whole effluent toxicity | monthly average minimum | ≥ 67 % | all year | TX1 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | 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 Ceriodaphnia dubia | monthly average 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 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | monthly average 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 Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day average | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| Whole effluent toxicity - retest #1 | single sample | report only (pass=0;fail=1) | all year | TXA |
| Whole effluent toxicity - retest #2 | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | single sample | report only (pass=0;fail=1) | all year | TXA |
Cited limits by parameter: Texas'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/TX0076953 · MCP: https://passage-data.com/mcp