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Gas Production And/Or Distribution, major discharger, Corpus Christi, Texas. NPDES permit TX0105481 expired Jul 24, 2024; its limits still apply. Last 12 months: over a limit 7 times (last June 2026), 1 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia), 7-day minimum | 67.13 % | ≥ 80 % | 16% |
| March 2026 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia), 7-day minimum | 41 % | ≥ 80 % | 49% |
| March 2026 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia), 7-day minimum | 78.6 % | ≥ 100 % | 21% |
| March 2026 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia), monthly average minimum | 67.74 % | ≥ 80 % | 15% |
| March 2026 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia), monthly average minimum | 87.87 % | ≥ 100 % | 12% |
| June 2026 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia), 7-day minimum | 42.67 % | ≥ 80 % | 47% |
| June 2026 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia), monthly average minimum | 69.32 % | ≥ 80 % | 13% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen demand, chem. [high level] [COD] | daily average | ≤ 150 mg/L | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 200 mg/L | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily average | ≤ 598 lb/d | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 798 lb/d | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 001 |
| Solids, total suspended | daily average | ≤ 120 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 399 lb/d | all year | 001 |
| Oil & Grease | daily average | ≤ 10 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Oil & Grease | daily average | ≤ 40 lb/d | all year | 001 |
| Oil & Grease | daily maximum | ≤ 60 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 | ≤ 12 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 40 lb/d | all year | 001 |
| Sulfide, total [as S] | daily average | ≤ .22 mg/L | all year | 001 |
| Sulfide, total [as S] | daily maximum | ≤ .44 mg/L | all year | 001 |
| Sulfide, total [as S] | daily average | ≤ .88 lb/d | all year | 001 |
| Sulfide, total [as S] | daily maximum | ≤ 1.76 lb/d | all year | 001 |
| Copper, total [as Cu] | daily average | ≤ .013 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .028 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily average | ≤ .08 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .16 mg/L | all year | 001 |
| Selenium, total [as Se] | daily average | ≤ .02 mg/L | all year | 001 |
| Selenium, total [as Se] | daily maximum | ≤ .04 mg/L | all year | 001 |
| Chlorine, total residual | daily average | report only (mg/L) | all year | 001 |
| Chlorine, total residual | daily maximum | report only (mg/L) | all year | 001 |
| Chlorine, total residual | daily average | report only (lb/d) | all year | 001 |
| Chlorine, total residual | daily maximum | report only (lb/d) | all year | 001 |
| Flow [dry weather] | daily average | ≤ .478 MGD | all year | 001 |
| Flow [dry weather] | daily maximum | ≤ 1.13 MGD | all year | 001 |
| Cyanide, free available | daily average | ≤ .003 mg/L | all year | 001 |
| Cyanide, free available | daily maximum | ≤ .006 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 15 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 30 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 60 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 120 lb/d | all year | 001 |
| 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 |
| Whole Effluent Toxicity [WET] - M. beryllina | 7-day minimum | ≥ 80 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - M. beryllina | monthly average minimum | ≥ 80 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - M. beryllina | 7-day minimum | ≥ 100 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - M. beryllina | monthly average minimum | ≥ 100 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | ≥ 80 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | ≥ 80 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | ≥ 100 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | ≥ 100 % | all year | TX1 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (M. bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (M. bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 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 |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | single sample | ≤ 100 % | all year | TXA |
| 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 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/TX0105481 · MCP: https://passage-data.com/mcp