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Sewage treatment plant, major discharger, Houston, Texas. NPDES permit TX0022543, in force until Aug 12, 2031. Last 12 months: over a limit 3 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| February 2026 | BOD, carbonaceous [5 day, 20 C], daily average | 5.5 mg/L | ≤ 5 mg/L | 10% |
| May 2026 | Enterococci, daily maximum | 488 CFU/100mL | ≤ 69 CFU/100mL | 607% |
| June 2026 | Enterococci, daily maximum | 345 CFU/100mL | ≤ 69 CFU/100mL | 400% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | monthly minimum | ≥ 4 mg/L | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily average | ≤ 12 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 40 mg/L | all year | 001 |
| Solids, total suspended | daily average | ≤ 1001 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 2 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 | ≤ 167 lb/d | all year | 001 |
| Copper, total [as Cu] | daily average | ≤ .02 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .04 mg/L | all year | 001 |
| Copper, total [as Cu] | daily average | ≤ 1.7 lb/d | all year | 001 |
| Zinc, total [as Zn] | daily average | ≤ .08 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .17 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily average | ≤ 6.8 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 | ≤ 21528 gal/min | all year | 001 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 10 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 |
| Enterococci | daily average | ≤ 23 CFU/100mL | all year | 001 |
| Enterococci | daily maximum | ≤ 69 CFU/100mL | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 5 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 20 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 417 lb/d | all year | 001 |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | ≥ 37 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | ≥ 37 % | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute Menidia beryllina | single grab 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/TX0022543 · MCP: https://passage-data.com/mcp