NPDES permit TX0005941 · Major NON-POTW · effective, expires 2027-07-29 · EPA's file as of 2026-09-19
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Last period with anything received: 2026-07-31. Most often over: Carbon, tot organic [TOC] (2), Enterococci (1).
Reports are due about 20 days after each monitoring period ends (the most common figure among TX permits in EPA's filings — check your permit).
| Outfall | Parameter | Statistic | Limit | Months |
|---|---|---|---|---|
| 002 | pH | MINIMUM | >= 5 SU | all year |
| 002 | pH | MAXIMUM | <= 11 SU | all year |
| 002 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 002 | Carbon, tot organic [TOC] | DAILY MX | <= 30 mg/L | all year |
| 002 | Copper, total [as Cu] | DAILY MX | <= 2 mg/L | all year |
| 002 | Lead, total [as Pb] | DAILY MX | <= 1.5 mg/L | all year |
| 002 | Zinc, total [as Zn] | DAILY MX | <= 6 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 |
| 002 | Nonpurgeable Organic Halides | DAILY MX | report only | all year |
| 002 | Purgeable Organic Halides | DAILY MX | report only | all year |
| 002 | pH range excursions, > 60 minutes | MO TOTAL | <= 0 occur/mo | all year |
| 002 | pH range excursions, monthly total accum | MO TOTAL | <= 446 min | all year |
| 003 | pH | MINIMUM | >= 6 SU | all year |
| 003 | pH | MAXIMUM | <= 9 SU | 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 | Copper, total [as Cu] | DAILY MX | <= 2 mg/L | all year |
| 003 | Lead, total [as Pb] | DAILY MX | <= 1.5 mg/L | all year |
| 003 | Zinc, total [as Zn] | DAILY MX | <= 6 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 | Temperature, water deg. fahrenheit | DAILY MX | <= 100 deg F | all year |
| 004 | BOD, 5-day, 20 deg. C | DAILY AV | <= 157 lb/d | all year |
| 004 | BOD, 5-day, 20 deg. C | DAILY MX | <= 315 lb/d | all year |
| 004 | pH | MINIMUM | >= 5 SU | all year |
| 004 | pH | MAXIMUM | <= 11 SU | all year |
| 004 | Solids, total suspended | DAILY AV | <= 393 lb/d | all year |
| 004 | Solids, total suspended | DAILY MX | <= 629 lb/d | all year |
| 004 | Oil & Grease | DAILY AV | <= 157 lb/d | all year |
| 004 | Oil & Grease | DAILY MX | <= 235 lb/d | all year |
| 004 | Nitrogen, ammonia total [as N] | DAILY MX | report only | all year |
| 004 | Nitrogen, Kjeldahl, total [as N] | DAILY MX | report only | all year |
| 004 | Carbon, tot organic [TOC] | DAILY AV | <= 314 lb/d | all year |
| 004 | Carbon, tot organic [TOC] | DAILY MX | <= 629 lb/d | all year |
| 004 | Cyanide, free [as free] | DAILY AV | <= .58 lb/d | all year |
| 004 | Cyanide, free [as free] | DAILY MX | <= 1.22 lb/d | all year |
| 004 | Arsenic, total [as As] | DAILY AV | <= 15.34 lb/d | all year |
| 004 | Arsenic, total [as As] | DAILY MX | <= 32.46 lb/d | all year |
| 004 | Cadmium, total [as Cd] | DAILY AV | <= 4.13 lb/d | all year |
| 004 | Cadmium, total [as Cd] | DAILY MX | <= 8.73 lb/d | all year |
| 004 | Chromium, hexavalent [as Cr] | DAILY AV | <= 20.48 lb/d | all year |
| 004 | Chromium, hexavalent [as Cr] | DAILY MX | <= 43.39 lb/d | all year |
| 004 | Chromium, total [as Cr] | DAILY AV | <= 1445 lb/d | all year |
| 004 | Chromium, total [as Cr] | DAILY MX | <= 3056 lb/d | all year |
| 004 | Copper, total [as Cu] | DAILY AV | <= 2.85 lb/d | all year |
| 004 | Copper, total [as Cu] | DAILY MX | <= 6.03 lb/d | all year |
| 004 | Lead, total [as Pb] | DAILY AV | <= 5.79 lb/d | all year |
| 004 | Lead, total [as Pb] | DAILY MX | <= 12.25 lb/d | all year |
| 004 | Nickel, total [as Ni] | DAILY AV | <= 5.41 lb/d | all year |
| 004 | Nickel, total [as Ni] | DAILY MX | <= 11.44 lb/d | all year |
| 004 | Silver, total [as Ag] | DAILY AV | <= .874 lb/d | all year |
| 004 | Silver, total [as Ag] | DAILY MX | <= 1.848 lb/d | all year |
| 004 | Zinc, total [as Zn] | DAILY AV | <= 16.46 lb/d | all year |
| 004 | Zinc, total [as Zn] | DAILY MX | <= 34.82 lb/d | all year |
| 004 | Selenium, total [as Se] | DAILY AV | <= 56.2 lb/d | all year |
| 004 | Selenium, total [as Se] | DAILY MX | <= 118 lb/d | all year |
| 004 | Carbon tetrachloride | DAILY AV | <= .24 lb/d | all year |
| 004 | Carbon tetrachloride | DAILY MX | <= .51 lb/d | all year |
| 004 | 1,2-Dichloroethane | DAILY AV | <= .91 lb/d | all year |
| 004 | 1,2-Dichloroethane | DAILY MX | <= 2.82 lb/d | all year |
| 004 | Chloroform | DAILY AV | <= .28 lb/d | all year |
| 004 | Chloroform | DAILY MX | <= .61 lb/d | all year |
| 004 | Toluene | DAILY AV | <= .35 lb/d | all year |
| 004 | Toluene | DAILY MX | <= 1.07 lb/d | all year |
| 004 | Benzene | DAILY AV | <= .49 lb/d | all year |
| 004 | Benzene | DAILY MX | <= 1.82 lb/d | all year |
| 004 | Ethylbenzene | DAILY AV | <= .42 lb/d | all year |
| 004 | Ethylbenzene | DAILY MX | <= 1.44 lb/d | all year |
| 004 | Methylene chloride | DAILY AV | <= .53 lb/d | all year |
| 004 | Methylene chloride | DAILY MX | <= 1.19 lb/d | all year |
| 004 | Phenanthrene | DAILY AV | <= .29 lb/d | all year |
| 004 | Phenanthrene | DAILY MX | <= .79 lb/d | all year |
| 004 | Tetrachloroethylene | DAILY AV | <= .29 lb/d | all year |
| 004 | Tetrachloroethylene | DAILY MX | <= .75 lb/d | all year |
| 004 | 1,1-Dichloroethylene | DAILY AV | <= .21 lb/d | all year |
| 004 | 1,1-Dichloroethylene | DAILY MX | <= .33 lb/d | all year |
| 004 | 1,1,2-Trichloroethane | DAILY AV | <= .33 lb/d | all year |
| 004 | 1,1,2-Trichloroethane | DAILY MX | <= .85 lb/d | all year |
| 004 | 1,2-Dichlorobenzene | DAILY AV | <= 1.03 lb/d | all year |
| 004 | 1,2-Dichlorobenzene | DAILY MX | <= 2.18 lb/d | all year |
| 004 | 1,2,4-Trichlorobenzene | DAILY AV | <= .91 lb/d | all year |
| 004 | 1,2,4-Trichlorobenzene | DAILY MX | <= 1.87 lb/d | all year |
| 004 | Phenol | DAILY AV | <= .2 lb/d | all year |
| 004 | Phenol | DAILY MX | <= .35 lb/d | all year |
| 004 | Pentachlorophenol | DAILY AV | <= 1.55 lb/d | all year |
| 004 | Pentachlorophenol | DAILY MX | <= 3.29 lb/d | all year |
| 004 | Benzidine | DAILY AV | <= .002 lb/d | all year |
| 004 | Benzidine | DAILY MX | <= .003 lb/d | all year |
| 004 | Trichloroethylene | DAILY AV | <= .28 lb/d | all year |
| 004 | Trichloroethylene | DAILY MX | <= .72 lb/d | all year |
| 004 | Aldrin | DAILY AV | <= .0000157 lb/d | all year |
| 004 | Aldrin | DAILY MX | <= .0000332 lb/d | all year |
| 004 | Chlordane [tech mix. and metabolites] | DAILY AV | <= .00358 lb/d | all year |
| 004 | Chlordane [tech mix. and metabolites] | DAILY MX | <= .00759 lb/d | all year |
| 004 | Dieldrin | DAILY AV | <= .0000274 lb/d | all year |
| 004 | Dieldrin | DAILY MX | <= .0000579 lb/d | all year |
| 004 | Endosulfan, total | DAILY AV | <= .004 lb/d | all year |
| 004 | Endosulfan, total | DAILY MX | <= .007 lb/d | all year |
| 004 | Endrin | DAILY AV | <= .001 lb/d | all year |
| 004 | Endrin | DAILY MX | <= .002 lb/d | all year |
| 004 | Toxaphene | DAILY MX | <= .0001 lb/d | all year |
| 004 | Heptachlor | DAILY AV | <= .000137 lb/d | all year |
| 004 | Heptachlor | DAILY MX | <= .00029 lb/d | all year |
| 004 | Heptachlor epoxide | DAILY AV | <= .000397 lb/d | all year |
| 004 | Heptachlor epoxide | DAILY MX | <= .00084 lb/d | all year |
| 004 | Polychlorinated biphenyls [PCBs] | DAILY AV | <= .0005 lb/d | all year |
| 004 | Polychlorinated biphenyls [PCBs] | DAILY MX | <= .001 lb/d | all year |
| 004 | Malathion | DAILY AV | <= .004 lb/d | all year |
| 004 | Malathion | DAILY MX | <= .009 lb/d | all year |
| 004 | Hexachlorobenzene | DAILY AV | <= .000931 lb/d | all year |
| 004 | Hexachlorobenzene | DAILY MX | <= .00197 lb/d | all year |
| 004 | Mirex | DAILY AV | <= .0004 lb/d | all year |
| 004 | Mirex | DAILY MX | <= .0009 lb/d | all year |
| 004 | Flow, in conduit or thru treatment plant | DAILY AV | <= 2.88 MGD | all year |
| 004 | Flow, in conduit or thru treatment plant | DAILY MX | <= 4.32 MGD | all year |
| 004 | Hexachlorophene | DAILY AV | <= .0076 lb/d | all year |
| 004 | Hexachlorophene | DAILY MX | <= .016 lb/d | all year |
| 004 | Enterococci | DAILY AV | <= 35 CFU/100mL | all year |
| 004 | Enterococci | DAILY MX | <= 104 CFU/100mL | all year |
| 004 | Mercury, total [as Hg] | DAILY AV | <= .015 lb/d | all year |
| 004 | Mercury, total [as Hg] | DAILY MX | <= .032 lb/d | all year |
| 004 | 2,4,5-Trichlorophenol | DAILY AV | <= 4.95 lb/d | all year |
| 004 | 2,4,5-Trichlorophenol | DAILY MX | <= 10.48 lb/d | all year |
| 004 | Hexachlorocyclohexane, total | DAILY AV | <= .016 lb/d | all year |
| 004 | Hexachlorocyclohexane, total | DAILY MX | <= .035 lb/d | all year |
| 004 | Chlorpyrifos | DAILY MX | <= .002 lb/d | all year |
| 004 | pH range excursions, > 60 minutes | MO TOTAL | <= 0 occur/mo | all year |
| 004 | pH range excursions, monthly total accum | MO TOTAL | <= 446 min | all year |
| 101 | BOD, 5-day, 20 deg. C | DAILY AV | <= 20 mg/L | all year |
| 101 | BOD, 5-day, 20 deg. C | DAILY MX | <= 40 mg/L | all year |
| 101 | pH | MINIMUM | >= 6 SU | all year |
| 101 | pH | MAXIMUM | <= 9 SU | all year |
| 101 | Solids, total suspended | DAILY AV | <= 30.6 mg/L | all year |
| 101 | Solids, total suspended | DAILY MX | <= 74.1 mg/L | all year |
| 101 | Oil & Grease | DAILY AV | <= 10 mg/L | all year |
| 101 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 101 | Carbon, tot organic [TOC] | DAILY AV | <= 50 mg/L | all year |
| 101 | Carbon, tot organic [TOC] | DAILY MX | <= 100 mg/L | all year |
| 101 | Copper, total [as Cu] | DAILY AV | <= .757 mg/L | all year |
| 101 | Copper, total [as Cu] | DAILY MX | <= .865 mg/L | all year |
| 101 | Zinc, total [as Zn] | DAILY AV | <= .42 mg/L | all year |
| 101 | Zinc, total [as Zn] | DAILY MX | <= .497 mg/L | all year |
| 101 | 2,4,6-Trichlorophenol | DAILY AV | <= .106 mg/L | all year |
| 101 | 2,4,6-Trichlorophenol | DAILY MX | <= .155 mg/L | all year |
| 101 | Phenol | DAILY AV | <= 1.08 mg/L | all year |
| 101 | Phenol | DAILY MX | <= 3.65 mg/L | all year |
| 101 | Flow, in conduit or thru treatment plant | DAILY AV | report only | all year |
| 101 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 101 | o-Cresol | DAILY AV | <= .561 mg/L | all year |
| 101 | o-Cresol | DAILY MX | <= 1.92 mg/L | all year |
| 101 | Pyridine | DAILY AV | <= .182 mg/L | all year |
| 101 | Pyridine | DAILY MX | <= .37 mg/L | all year |
| 101 | p-Cresol | DAILY AV | <= .205 mg/L | all year |
| 101 | p-Cresol | DAILY MX | <= .698 mg/L | all year |
| 101 | 2-Butanone | DAILY AV | <= 1.85 mg/L | all year |
| 101 | 2-Butanone | DAILY MX | <= 4.81 mg/L | all year |
| 101 | Acetone | DAILY AV | <= 7.97 mg/L | all year |
| 101 | Acetone | DAILY MX | <= 30.2 mg/L | all year |
| 101 | Acetophenone | DAILY AV | <= .0562 mg/L | all year |
| 101 | Acetophenone | DAILY MX | <= .114 mg/L | all year |
| 201 | pH | MINIMUM | >= 6 SU | all year |
| 201 | pH | MAXIMUM | <= 9 SU | all year |
| 201 | Solids, total suspended | DAILY AV | <= 31 mg/L | all year |
| 201 | Solids, total suspended | DAILY MX | <= 60 mg/L | all year |
| 201 | Oil & Grease | DAILY AV | <= 50.2 mg/L | all year |
| 201 | Oil & Grease | DAILY MX | <= 205 mg/L | all year |
| 201 | Cyanide, total [as CN] | DAILY AV | <= 178 mg/L | all year |
| 201 | Cyanide, total [as CN] | DAILY MX | <= 500 mg/L | all year |
| 201 | Arsenic, total [as As] | DAILY AV | <= .104 mg/L | all year |
| 201 | Arsenic, total [as As] | DAILY MX | <= .162 mg/L | all year |
| 201 | Cadmium, total [as Cd] | DAILY AV | <= .0962 mg/L | all year |
| 201 | Cadmium, total [as Cd] | DAILY MX | <= .474 mg/L | all year |
| 201 | Chromium, total [as Cr] | DAILY AV | <= 3.07 mg/L | all year |
| 201 | Chromium, total [as Cr] | DAILY MX | <= 15.5 mg/L | all year |
| 201 | Cobalt, total [as Co] | DAILY AV | <= .124 mg/L | all year |
| 201 | Cobalt, total [as Co] | DAILY MX | <= .192 mg/L | all year |
| 201 | Copper, total [as Cu] | DAILY AV | <= 1.06 mg/L | all year |
| 201 | Copper, total [as Cu] | DAILY MX | <= 4.14 mg/L | all year |
| 201 | Lead, total [as Pb] | DAILY AV | <= .283 mg/L | all year |
| 201 | Lead, total [as Pb] | DAILY MX | <= 1.32 mg/L | all year |
| 201 | Nickel, total [as Ni] | DAILY AV | <= 1.45 mg/L | all year |
| 201 | Nickel, total [as Ni] | DAILY MX | <= 3.95 mg/L | all year |
| 201 | Silver, total [as Ag] | DAILY AV | <= .0351 mg/L | all year |
| 201 | Silver, total [as Ag] | DAILY MX | <= .12 mg/L | all year |
| 201 | Vanadium, total [as V] | DAILY AV | <= .0662 mg/L | all year |
| 201 | Vanadium, total [as V] | DAILY MX | <= .218 mg/L | all year |
| 201 | Zinc, total [as Zn] | DAILY AV | <= .641 mg/L | all year |
| 201 | Zinc, total [as Zn] | DAILY MX | <= 2.87 mg/L | all year |
| 201 | Antimony, total [as Sb] | DAILY AV | <= .206 mg/L | all year |
| 201 | Antimony, total [as Sb] | DAILY MX | <= .249 mg/L | all year |
| 201 | Tin, total [as Sn] | DAILY AV | <= .12 mg/L | all year |
| 201 | Tin, total [as Sn] | DAILY MX | <= .409 mg/L | all year |
| 201 | Titanium, total [as Ti] | DAILY AV | <= .0618 mg/L | all year |
| 201 | Titanium, total [as Ti] | DAILY MX | <= .0947 mg/L | all year |
| 201 | Flow, in conduit or thru treatment plant | DAILY AV | report only | all year |
| 201 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 201 | Mercury, total [as Hg] | DAILY AV | <= .000739 mg/L | all year |
| 201 | Mercury, total [as Hg] | DAILY MX | <= .00234 mg/L | all year |
| TX4 | Whole effluent toxicity - retest #1 | 7 DA MIN | report only | all year |
| TX4 | Whole effluent toxicity - retest #1 | MO AV MN | report only | all year |
| TX4 | Whole effluent toxicity - retest #2 | 7 DA MIN | report only | all year |
| TX4 | Whole effluent toxicity - retest #2 | MO AV MN | report only | all year |
| TX4 | Whole Effluent Toxicity [WET] - M. beryllina | 7 DA MIN | >= 2.4 % | all year |
| TX4 | Whole Effluent Toxicity [WET] - M. beryllina | MO AV MN | >= 2.4 % | all year |
| TX4 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | >= 2.4 % | all year |
| TX4 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | >= 2.4 % | all year |
| TX4 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX4 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | MO AV MN | report only | all year |
| TX4 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 7 DA MIN | report only | all year |
| TX4 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | MO AV MN | report only | all year |
| TX4 | NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX4 | NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX4 | NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 7 DA MIN | report only | all year |
| TX4 | NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | MO AV MN | report only | all year |
| TX4 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX4 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX4 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 7 DA MIN | report only | all year |
| TX4 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | MO AV MN | report only | all year |
| TX4 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX4 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX4 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 7 DA MIN | report only | all year |
| TX4 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | MO AV MN | report only | all year |
| TX4 | LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX4 | LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX4 | LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 7 DA MIN | report only | all year |
| TX4 | LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | MO AV MN | report only | all year |
| TX4 | LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX4 | LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | MO AV MN | report only | all year |
| TX4 | LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 7 DA MIN | report only | all year |
| TX4 | LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | MO AV MN | report only | all year |
| TXD | Whole effluent toxicity - retest #1 | SINGSAMP | report only | all year |
| TXD | Whole effluent toxicity - retest #2 | SINGSAMP | report only | all year |
| TXD | LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | SINGSAMP | report only | all year |
| TXD | LC50 Pass/Fail Static 24Hr Acute Menidia menidia | SINGSAMP | report only | all year |
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