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Sewage treatment plant, major discharger, Baytown, Texas. NPDES permit TX0020109, in force until Jun 19, 2029. Last 12 months: over a limit 24 times (last April 2026), 3 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | BOD, carbonaceous [5 day, 20 C], daily average | 9.73 mg/L | ≤ 7 mg/L | 39% |
| October 2025 | Nitrogen, ammonia total [as N], daily average | 21.955 mg/L | ≤ 2 mg/L | 998% |
| October 2025 | Nitrogen, ammonia total [as N], daily average | 533.549 lb/d | ≤ 103 lb/d | 418% |
| October 2025 | Nitrogen, ammonia total [as N], daily maximum | 27.5 mg/L | ≤ 10 mg/L | 175% |
| November 2025 | BOD, carbonaceous [5 day, 20 C], daily average | 29.48 mg/L | ≤ 10 mg/L | 195% |
| November 2025 | BOD, carbonaceous [5 day, 20 C], daily average | 632.92 lb/d | ≤ 517 lb/d | 22% |
| November 2025 | BOD, carbonaceous [5 day, 20 C], daily maximum | 66.3 mg/L | ≤ 25 mg/L | 165% |
| November 2025 | Nitrogen, ammonia total [as N], daily average | 31.548 mg/L | ≤ 5 mg/L | 531% |
| November 2025 | Nitrogen, ammonia total [as N], daily average | 640.996 lb/d | ≤ 259 lb/d | 147% |
| November 2025 | Nitrogen, ammonia total [as N], daily maximum | 41.5 mg/L | ≤ 10 mg/L | 315% |
| November 2025 | Solids, total suspended, daily average | 18.8 mg/L | ≤ 15 mg/L | 25% |
| December 2025 | BOD, carbonaceous [5 day, 20 C], daily average | 15.49 mg/L | ≤ 10 mg/L | 55% |
| December 2025 | BOD, carbonaceous [5 day, 20 C], daily maximum | 26.7 mg/L | ≤ 25 mg/L | 7% |
| December 2025 | Nitrogen, ammonia total [as N], daily average | 17.8 mg/L | ≤ 5 mg/L | 256% |
| December 2025 | Nitrogen, ammonia total [as N], daily average | 565.154 lb/d | ≤ 259 lb/d | 118% |
| December 2025 | Nitrogen, ammonia total [as N], daily maximum | 33.5 mg/L | ≤ 10 mg/L | 235% |
| December 2025 | Solids, total suspended, daily average | 17.8 mg/L | ≤ 15 mg/L | 19% |
| January 2026 | Nitrogen, ammonia total [as N], daily average | 28.948 mg/L | ≤ 5 mg/L | 479% |
| January 2026 | Nitrogen, ammonia total [as N], daily average | 680.582 lb/d | ≤ 259 lb/d | 163% |
| January 2026 | Nitrogen, ammonia total [as N], daily maximum | 35 mg/L | ≤ 10 mg/L | 250% |
| February 2026 | Nitrogen, ammonia total [as N], daily average | 12.3 mg/L | ≤ 5 mg/L | 146% |
| February 2026 | Nitrogen, ammonia total [as N], daily average | 312.15 lb/d | ≤ 259 lb/d | 21% |
| February 2026 | Nitrogen, ammonia total [as N], daily maximum | 28 mg/L | ≤ 10 mg/L | 180% |
| April 2026 | Nitrogen, ammonia total [as N], daily average | 3 mg/L | ≤ 2 mg/L | 50% |
| 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 | ≤ 776 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 2 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 5 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 103 lb/d | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 259 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Cyanide, free [as free] | daily average | ≤ .00878 mg/L | all year | 001 |
| Cyanide, free [as free] | daily maximum | ≤ .01857 mg/L | all year | 001 |
| Cyanide, free [as free] | daily average | ≤ .45 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 | ≤ 23615 gal/min | all year | 001 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 6.2 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 | ≤ 7 mg/L | Apr–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 10 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 22 mg/L | Apr–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 25 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 362 lb/d | Apr–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 517 lb/d | Jan, Feb, Mar, Nov, Dec | 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 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 |
| 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 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/TX0020109 · MCP: https://passage-data.com/mcp