NPDES permit TX0004201 · Major NON-POTW · effective, expires 2028-10-23 · EPA's file as of 2026-09-19
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Last period with anything received: 2026-08-31. Most often over: Solids, total suspended (4), pH (1).
Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).
| Outfall | Parameter | Statistic | Limit | Months |
|---|---|---|---|---|
| 001 | BOD, 5-day, 20 deg. C | DAILY AV | <= 2831 lb/d | all year |
| 001 | BOD, 5-day, 20 deg. C | DAILY MX | <= 5298 lb/d | all year |
| 001 | Oxygen demand, chem. [high level] [COD] | DAILY AV | <= 19418 lb/d | all year |
| 001 | Oxygen demand, chem. [high level] [COD] | DAILY MX | <= 37733 lb/d | all year |
| 001 | pH | MINIMUM | >= 6 SU | all year |
| 001 | pH | MAXIMUM | <= 9 SU | all year |
| 001 | Solids, total suspended | DAILY AV | <= 2555 lb/d | all year |
| 001 | Solids, total suspended | DAILY MX | <= 4801 lb/d | all year |
| 001 | Oil & Grease | DAILY AV | <= 904 lb/d | all year |
| 001 | Oil & Grease | DAILY MX | <= 1674 lb/d | all year |
| 001 | Nitrogen, ammonia total [as N] | DAILY AV | <= 1203 lb/d | all year |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 2686 lb/d | all year |
| 001 | Carbon, tot organic [TOC] | DAILY AV | <= 3223 lb/d | all year |
| 001 | Carbon, tot organic [TOC] | DAILY MX | <= 6446 lb/d | all year |
| 001 | Cyanide, free [as free] | DAILY AV | <= .52 lb/d | all year |
| 001 | Cyanide, free [as free] | DAILY MX | <= 1.1 lb/d | all year |
| 001 | Sulfide, total [as S] | DAILY AV | <= 11.3 lb/d | all year |
| 001 | Sulfide, total [as S] | DAILY MX | <= 25.3 lb/d | all year |
| 001 | Chromium, hexavalent [as Cr] | DAILY AV | <= 1.81 lb/d | all year |
| 001 | Chromium, hexavalent [as Cr] | DAILY MX | <= 4.04 lb/d | all year |
| 001 | Chromium, total [as Cr] | DAILY AV | <= 24.7 lb/d | all year |
| 001 | Chromium, total [as Cr] | DAILY MX | <= 65.4 lb/d | all year |
| 001 | Carbon tetrachloride | DAILY AV | <= .96 lb/d | all year |
| 001 | Carbon tetrachloride | DAILY MX | <= 2.02 lb/d | all year |
| 001 | 1,2-Dichloroethane | DAILY AV | <= 3.62 lb/d | all year |
| 001 | 1,2-Dichloroethane | DAILY MX | <= 11.22 lb/d | all year |
| 001 | Chloroform | DAILY AV | <= 1.12 lb/d | all year |
| 001 | Chloroform | DAILY MX | <= 2.45 lb/d | all year |
| 001 | Toluene | DAILY AV | <= 1.38 lb/d | all year |
| 001 | Toluene | DAILY MX | <= 4.26 lb/d | all year |
| 001 | Benzene | DAILY AV | <= 1.97 lb/d | all year |
| 001 | Benzene | DAILY MX | <= 7.23 lb/d | all year |
| 001 | Acenaphthylene | DAILY AV | <= 1.17 lb/d | all year |
| 001 | Acenaphthylene | DAILY MX | <= 3.14 lb/d | all year |
| 001 | Acenaphthene | DAILY AV | <= 1.17 lb/d | all year |
| 001 | Acenaphthene | DAILY MX | <= 3.14 lb/d | all year |
| 001 | Acrylonitrile | DAILY AV | <= 5.11 lb/d | all year |
| 001 | Acrylonitrile | DAILY MX | <= 12.87 lb/d | all year |
| 001 | Anthracene | DAILY AV | <= 1.17 lb/d | all year |
| 001 | Anthracene | DAILY MX | <= 3.14 lb/d | all year |
| 001 | Benzo[k]fluoranthene | DAILY AV | <= 1.17 lb/d | all year |
| 001 | Benzo[k]fluoranthene | DAILY MX | <= 3.14 lb/d | all year |
| 001 | Benzo[a]pyrene | DAILY AV | <= .0051 lb/d | all year |
| 001 | Benzo[a]pyrene | DAILY MX | <= .0107 lb/d | all year |
| 001 | Chlorobenzene | DAILY AV | <= .8 lb/d | all year |
| 001 | Chlorobenzene | DAILY MX | <= 1.49 lb/d | all year |
| 001 | Chrysene | DAILY AV | <= 1.17 lb/d | all year |
| 001 | Chrysene | DAILY MX | <= 3.14 lb/d | all year |
| 001 | Diethyl phthalate | DAILY AV | <= 4.31 lb/d | all year |
| 001 | Diethyl phthalate | DAILY MX | <= 10.8 lb/d | all year |
| 001 | Dimethyl phthalate | DAILY AV | <= 1.01 lb/d | all year |
| 001 | Dimethyl phthalate | DAILY MX | <= 2.5 lb/d | all year |
| 001 | Ethylbenzene | DAILY AV | <= 1.7 lb/d | all year |
| 001 | Ethylbenzene | DAILY MX | <= 5.75 lb/d | all year |
| 001 | Fluoranthene | DAILY AV | <= 1.33 lb/d | all year |
| 001 | Fluoranthene | DAILY MX | <= 3.62 lb/d | all year |
| 001 | Fluorene | DAILY AV | <= 1.17 lb/d | all year |
| 001 | Fluorene | DAILY MX | <= 3.14 lb/d | all year |
| 001 | Hexachlorobutadiene | DAILY AV | <= .445 lb/d | all year |
| 001 | Hexachlorobutadiene | DAILY MX | <= .942 lb/d | all year |
| 001 | Hexachloroethane | DAILY AV | <= 1.12 lb/d | all year |
| 001 | Hexachloroethane | DAILY MX | <= 2.87 lb/d | all year |
| 001 | Methyl chloride [Chloromethane] | DAILY AV | <= 4.58 lb/d | all year |
| 001 | Methyl chloride [Chloromethane] | DAILY MX | <= 10.11 lb/d | all year |
| 001 | Methylene chloride | DAILY AV | <= 2.13 lb/d | all year |
| 001 | Methylene chloride | DAILY MX | <= 4.73 lb/d | all year |
| 001 | Nitrobenzene | DAILY AV | <= 1.44 lb/d | all year |
| 001 | Nitrobenzene | DAILY MX | <= 3.62 lb/d | all year |
| 001 | Phenanthrene | DAILY AV | <= .711 lb/d | all year |
| 001 | Phenanthrene | DAILY MX | <= 1.51 lb/d | all year |
| 001 | Pyrene | DAILY AV | <= 1.33 lb/d | all year |
| 001 | Pyrene | DAILY MX | <= 3.56 lb/d | all year |
| 001 | Tetrachloroethylene | DAILY AV | <= 1.17 lb/d | all year |
| 001 | Tetrachloroethylene | DAILY MX | <= 2.98 lb/d | all year |
| 001 | 1,1-Dichloroethane | DAILY AV | <= 1.17 lb/d | all year |
| 001 | 1,1-Dichloroethane | DAILY MX | <= 3.14 lb/d | all year |
| 001 | 1,1-Dichloroethylene | DAILY AV | <= .85 lb/d | all year |
| 001 | 1,1-Dichloroethylene | DAILY MX | <= 1.33 lb/d | all year |
| 001 | 1,1,1-Trichloroethane | DAILY AV | <= 1.12 lb/d | all year |
| 001 | 1,1,1-Trichloroethane | DAILY MX | <= 2.87 lb/d | all year |
| 001 | 1,1,2-Trichloroethane | DAILY AV | <= 1.12 lb/d | all year |
| 001 | 1,1,2-Trichloroethane | DAILY MX | <= 2.87 lb/d | all year |
| 001 | Benzo[a]anthracene | DAILY AV | <= .051 lb/d | all year |
| 001 | Benzo[a]anthracene | DAILY MX | <= .107 lb/d | all year |
| 001 | 1,2-Dichlorobenzene | DAILY AV | <= 4.1 lb/d | all year |
| 001 | 1,2-Dichlorobenzene | DAILY MX | <= 8.67 lb/d | all year |
| 001 | 1,2-Dichloropropane | DAILY AV | <= 8.14 lb/d | all year |
| 001 | 1,2-Dichloropropane | DAILY MX | <= 12.24 lb/d | all year |
| 001 | trans-1,2-Dichloroethylene | DAILY AV | <= 1.12 lb/d | all year |
| 001 | trans-1,2-Dichloroethylene | DAILY MX | <= 2.87 lb/d | all year |
| 001 | 1,2,4-Trichlorobenzene | DAILY AV | <= 3.62 lb/d | all year |
| 001 | 1,2,4-Trichlorobenzene | DAILY MX | <= 7.45 lb/d | all year |
| 001 | 1,3-Dichlorobenzene | DAILY AV | <= 1.65 lb/d | all year |
| 001 | 1,3-Dichlorobenzene | DAILY MX | <= 2.34 lb/d | all year |
| 001 | 1,4-Dichlorobenzene | DAILY AV | <= .8 lb/d | all year |
| 001 | 1,4-Dichlorobenzene | DAILY MX | <= 1.49 lb/d | all year |
| 001 | 2-Chlorophenol | DAILY AV | <= 1.65 lb/d | all year |
| 001 | 2-Chlorophenol | DAILY MX | <= 5.21 lb/d | all year |
| 001 | 2-Nitrophenol | DAILY AV | <= 2.18 lb/d | all year |
| 001 | 2-Nitrophenol | DAILY MX | <= 3.67 lb/d | all year |
| 001 | 2,4-Dichlorophenol | DAILY AV | <= 2.07 lb/d | all year |
| 001 | 2,4-Dichlorophenol | DAILY MX | <= 5.96 lb/d | all year |
| 001 | 2,4-Dimethylphenol | DAILY AV | <= .96 lb/d | all year |
| 001 | 2,4-Dimethylphenol | DAILY MX | <= 1.92 lb/d | all year |
| 001 | 2,4-Dinitrotoluene | DAILY AV | <= 6.01 lb/d | all year |
| 001 | 2,4-Dinitrotoluene | DAILY MX | <= 15.16 lb/d | all year |
| 001 | 2,4-Dinitrophenol | DAILY AV | <= 3.78 lb/d | all year |
| 001 | 2,4-Dinitrophenol | DAILY MX | <= 6.54 lb/d | all year |
| 001 | 2,6-Dinitrotoluene | DAILY AV | <= 13.57 lb/d | all year |
| 001 | 2,6-Dinitrotoluene | DAILY MX | <= 34.1 lb/d | all year |
| 001 | 4-Nitrophenol | DAILY AV | <= 3.83 lb/d | all year |
| 001 | 4-Nitrophenol | DAILY MX | <= 6.6 lb/d | all year |
| 001 | 4,6-Dinitro-o-cresol | DAILY AV | <= 4.15 lb/d | all year |
| 001 | 4,6-Dinitro-o-cresol | DAILY MX | <= 14.74 lb/d | all year |
| 001 | Phenol | DAILY AV | <= .8 lb/d | all year |
| 001 | Phenol | DAILY MX | <= 1.38 lb/d | all year |
| 001 | Naphthalene | DAILY AV | <= 1.17 lb/d | all year |
| 001 | Naphthalene | DAILY MX | <= 3.14 lb/d | all year |
| 001 | Di[2-ethylhexyl] phthalate [DEHP] | DAILY AV | <= 5.48 lb/d | all year |
| 001 | Di[2-ethylhexyl] phthalate [DEHP] | DAILY MX | <= 14.84 lb/d | all year |
| 001 | Di-n-butyl phthalate | DAILY AV | <= 1.44 lb/d | all year |
| 001 | Di-n-butyl phthalate | DAILY MX | <= 3.03 lb/d | all year |
| 001 | Vinyl chloride | DAILY AV | <= 5.53 lb/d | all year |
| 001 | Vinyl chloride | DAILY MX | <= 14.26 lb/d | all year |
| 001 | Trichloroethylene | DAILY AV | <= 1.12 lb/d | all year |
| 001 | Trichloroethylene | DAILY MX | <= 2.87 lb/d | all year |
| 001 | Polychlorinated biphenyls [PCBs] | DAILY MX | report only | all year |
| 001 | Hexachlorobenzene | DAILY AV | <= .0014 lb/d | all year |
| 001 | Hexachlorobenzene | DAILY MX | <= .0029 lb/d | all year |
| 001 | Flow, in conduit or thru treatment plant | DAILY AV | <= 7.1 MGD | all year |
| 001 | Flow, in conduit or thru treatment plant | DAILY MX | <= 9.1 MGD | all year |
| 001 | 1,3-Dichloropropylene | DAILY AV | <= 1.54 lb/d | all year |
| 001 | 1,3-Dichloropropylene | DAILY MX | <= 2.34 lb/d | all year |
| 001 | Phenolic compounds, total | DAILY AV | <= 15.8 lb/d | all year |
| 001 | Phenolic compounds, total | DAILY MX | <= 34.3 lb/d | all year |
| 001 | 3,4-Benzofluoranthene | DAILY AV | <= 1.22 lb/d | all year |
| 001 | 3,4-Benzofluoranthene | DAILY MX | <= 3.25 lb/d | all year |
| 001 | Chloroethane | DAILY AV | <= 5.53 lb/d | all year |
| 001 | Chloroethane | DAILY MX | <= 14.26 lb/d | all year |
| 002 | pH | MINIMUM | >= 6 SU | all year |
| 002 | pH | MAXIMUM | <= 9 SU | all year |
| 002 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 002 | Carbon, tot organic [TOC] | DAILY MX | <= 55 mg/L | all year |
| 002 | Flow, in conduit or thru treatment plant | DAILY AV | report only | all year |
| 002 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 003 | pH | MINIMUM | >= 6 SU | all year |
| 003 | pH | MAXIMUM | <= 9 SU | all year |
| 003 | Solids, total suspended | DAILY MX | report only | all year |
| 003 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 003 | Carbon, tot organic [TOC] | DAILY MX | <= 55 mg/L | all year |
| 003 | Flow, in conduit or thru treatment plant | DAILY AV | report only | all year |
| 003 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 004 | pH | MINIMUM | >= 6 SU | all year |
| 004 | pH | MAXIMUM | <= 9 SU | all year |
| 004 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 004 | Carbon, tot organic [TOC] | DAILY MX | <= 55 mg/L | all year |
| 004 | Flow, in conduit or thru treatment plant | DAILY AV | report only | all year |
| 004 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 005 | pH | MINIMUM | >= 6 SU | all year |
| 005 | pH | MAXIMUM | <= 9 SU | all year |
| 005 | Solids, total suspended | DAILY MX | <= 60 mg/L | all year |
| 005 | Flow, in conduit or thru treatment plant | DAILY AV | report only | all year |
| 005 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 006 | pH | MINIMUM | >= 6 SU | all year |
| 006 | pH | MAXIMUM | <= 9 SU | all year |
| 006 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 006 | Carbon, tot organic [TOC] | DAILY MX | <= 55 mg/L | all year |
| 006 | Flow, in conduit or thru treatment plant | DAILY AV | report only | all year |
| 006 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 007 | pH | MINIMUM | >= 6 SU | all year |
| 007 | pH | MAXIMUM | <= 9 SU | all year |
| 007 | Solids, total suspended | DAILY MX | <= 60 mg/L | all year |
| 007 | Solids, total suspended | DAILY MX | <= 300 mg/L | all year |
| 007 | Solids, total suspended | DAILY MX | report only | all year |
| 007 | Flow, in conduit or thru treatment plant | DAILY AV | report only | all year |
| 007 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 008 | pH | MINIMUM | >= 6 SU | all year |
| 008 | pH | MAXIMUM | <= 9 SU | all year |
| 008 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 008 | Carbon, tot organic [TOC] | DAILY MX | <= 55 mg/L | all year |
| 008 | Flow, in conduit or thru treatment plant | DAILY AV | report only | all year |
| 008 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| TX1 | Whole effluent toxicity - retest #1 | 7 DA MIN | report only | all year |
| TX1 | Whole effluent toxicity - retest #1 | MO AV MN | report only | all year |
| TX1 | Whole effluent toxicity - retest #2 | 7 DA MIN | report only | all year |
| TX1 | Whole effluent toxicity - retest #2 | MO AV MN | report only | all year |
| TX1 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX1 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | MO AV MN | report only | all year |
| TX1 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX1 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TX1 | NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX1 | NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX1 | NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX1 | NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TX1 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX1 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX1 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX1 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TX1 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX1 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX1 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX1 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TX1 | LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX1 | LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX1 | LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX1 | LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TX1 | LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX1 | LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | MO AV MN | report only | all year |
| TX1 | LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX1 | LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TXA | Whole effluent toxicity - retest #1 | SINGSAMP | report only | all year |
| TXA | Whole effluent toxicity - retest #2 | SINGSAMP | report only | all year |
| TXA | LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | SINGSAMP | report only | all year |
| TXA | LC50 Pass/Fail Static 24Hr Acute Menidia beryllina | SINGSAMP | report only | all year |
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