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Sewage treatment plant, major discharger, La Marque, Texas. NPDES permit TX0114821 expired Jul 27, 2025; its limits still apply. Last 12 months: over a limit 25 times (last September 2026), 10 of 18 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Copper, total [as Cu], daily average | .0079 mg/L | ≤ .00766 mg/L | 3% |
| December 2025 | Nitrogen, ammonia total [as N], daily maximum | 15.1 mg/L | ≤ 10 mg/L | 51% |
| January 2026 | Nitrogen, ammonia total [as N], daily maximum | 10.3 mg/L | ≤ 10 mg/L | 3% |
| February 2026 | Nitrogen, ammonia total [as N], daily average | 3.84 mg/L | ≤ 3 mg/L | 28% |
| February 2026 | Nitrogen, ammonia total [as N], daily average | 81.665 lb/d | ≤ 75 lb/d | 9% |
| February 2026 | Nitrogen, ammonia total [as N], daily maximum | 13.5 mg/L | ≤ 10 mg/L | 35% |
| March 2026 | Nitrogen, ammonia total [as N], daily average | 3.01 mg/L | ≤ 3 mg/L | 0% |
| April 2026 | Nitrogen, ammonia total [as N], daily average | 3.27 mg/L | ≤ 3 mg/L | 9% |
| April 2026 | Nitrogen, ammonia total [as N], daily maximum | 14.5 mg/L | ≤ 10 mg/L | 45% |
| May 2026 | Copper, total [as Cu], daily average | .0092 mg/L | ≤ .00766 mg/L | 20% |
| May 2026 | Copper, total [as Cu], daily maximum | .028 mg/L | ≤ .0162 mg/L | 73% |
| June 2026 | Copper, total [as Cu], daily average | .0209 mg/L | ≤ .00766 mg/L | 173% |
| June 2026 | Copper, total [as Cu], daily average | .962 lb/d | ≤ .19 lb/d | 406% |
| June 2026 | Copper, total [as Cu], daily maximum | .136 mg/L | ≤ .0162 mg/L | 740% |
| June 2026 | Nitrogen, ammonia total [as N], daily average | 87.4 lb/d | ≤ 75 lb/d | 17% |
| July 2026 | Nitrogen, ammonia total [as N], daily average | 5.22 mg/L | ≤ 3 mg/L | 74% |
| July 2026 | Nitrogen, ammonia total [as N], daily maximum | 16.6 mg/L | ≤ 10 mg/L | 66% |
| August 2026 | Copper, total [as Cu], daily average | .0115 mg/L | ≤ .00766 mg/L | 50% |
| August 2026 | Copper, total [as Cu], daily average | 1.49 lb/d | ≤ .19 lb/d | 684% |
| August 2026 | Copper, total [as Cu], daily maximum | .0489 mg/L | ≤ .0162 mg/L | 202% |
| August 2026 | Enterococci, daily maximum | 105 CFU/100mL | ≤ 104 CFU/100mL | 1% |
| September 2026 | Copper, total [as Cu], daily average | .0127 mg/L | ≤ .00766 mg/L | 66% |
| September 2026 | Copper, total [as Cu], daily maximum | .0288 mg/L | ≤ .0162 mg/L | 78% |
| September 2026 | Enterococci, daily average | 127 CFU/100mL | ≤ 35 CFU/100mL | 263% |
| September 2026 | Enterococci, daily maximum | 598 CFU/100mL | ≤ 104 CFU/100mL | 475% |
| 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 | ≤ 15 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 40 mg/L | all year | 001 |
| Solids, total suspended | daily average | ≤ 375 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 | ≤ 75 lb/d | all year | 001 |
| Copper, total [as Cu] | daily average | ≤ .00766 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .0162 mg/L | all year | 001 |
| Copper, total [as Cu] | daily average | ≤ .19 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 | ≤ 8333 gal/min | all year | 001 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 3 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 | ≤ 35 CFU/100mL | all year | 001 |
| Enterococci | daily maximum | ≤ 104 CFU/100mL | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 10 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 250 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 |
| 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 menidia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 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 menidia | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 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 menidia | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 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 menidia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 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 menidia | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 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 Reproduction Static Renewal 7 Day Chronic Menidia menidia | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 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 Americamysis bahia (formerly Mysidopsis bahia) | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | 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/TX0114821 · MCP: https://passage-data.com/mcp