NPDES permit TX0131644 · Major NON-POTW · effective, expires 2031-07-13 · EPA's file as of 2026-09-19
Check this month's numbers before you fileLast period with anything received: 2026-08-31.
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 |
|---|---|---|---|---|
| 004 | Oxygen demand, chem. [high level] [COD] | DAILY MX | <= 200 mg/L | 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 | 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 | Oxygen demand, chem. [high level] [COD] | DAILY MX | <= 200 mg/L | all year |
| 005 | pH | MINIMUM | >= 6 SU | all year |
| 005 | pH | MAXIMUM | <= 9 SU | all year |
| 005 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 005 | Aluminum, total [as Al] | DAILY AV | report only | all year |
| 005 | Aluminum, total [as Al] | DAILY MX | report only | all year |
| 005 | Flow [dry weather] | DAILY AV | <= .44 MGD | all year |
| 005 | Flow [dry weather] | DAILY MX | report only | all year |
| 103 | Oxygen, dissolved [DO] | MO MIN | >= 2 mg/L | all year |
| 103 | BOD, 5-day, 20 deg. C | DAILY AV | <= 42 mg/L | all year |
| 103 | BOD, 5-day, 20 deg. C | DAILY MX | <= 220 mg/L | all year |
| 103 | pH | MINIMUM | >= 6 SU | all year |
| 103 | pH | MAXIMUM | <= 9 SU | all year |
| 103 | Solids, total suspended | DAILY AV | <= 27 mg/L | all year |
| 103 | Solids, total suspended | DAILY MX | <= 88 mg/L | all year |
| 103 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 103 | Nitrogen, ammonia total [as N] | DAILY AV | <= 3.7 mg/L | all year |
| 103 | Nitrogen, ammonia total [as N] | DAILY MX | <= 10 mg/L | all year |
| 103 | Arsenic, total [as As] | DAILY AV | <= .508 mg/L | all year |
| 103 | Arsenic, total [as As] | DAILY MX | <= 1.07 mg/L | all year |
| 103 | Chromium, total [as Cr] | DAILY AV | <= .46 mg/L | all year |
| 103 | Chromium, total [as Cr] | DAILY MX | <= 1.1 mg/L | all year |
| 103 | Zinc, total [as Zn] | DAILY AV | <= .296 mg/L | all year |
| 103 | Zinc, total [as Zn] | DAILY MX | <= .535 mg/L | all year |
| 103 | Radium 226 & 228, dissolved | DAILY MX | <= 5 pCi/L | all year |
| 103 | Uranium, total | DAILY MX | <= 30 ug/L | all year |
| 103 | Phenol | DAILY AV | <= .029 mg/L | all year |
| 103 | Phenol | DAILY MX | <= .048 mg/L | all year |
| 103 | Naphthalene | DAILY AV | <= .022 mg/L | all year |
| 103 | Naphthalene | DAILY MX | <= .059 mg/L | all year |
| 103 | Flow, in conduit or thru treatment plant | DAILY AV | <= .44 MGD | all year |
| 103 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 103 | .alpha.-Terpineol | DAILY AV | <= .019 mg/L | all year |
| 103 | .alpha.-Terpineol | DAILY MX | <= .042 mg/L | all year |
| 103 | Pyridine | DAILY AV | <= .025 mg/L | all year |
| 103 | Pyridine | DAILY MX | <= .072 mg/L | all year |
| 103 | Aniline | DAILY AV | <= .015 mg/L | all year |
| 103 | Aniline | DAILY MX | <= .024 mg/L | all year |
| 103 | p-Cresol | DAILY AV | <= .015 mg/L | all year |
| 103 | p-Cresol | DAILY MX | <= .024 mg/L | all year |
| 103 | Benzoic acids, total | DAILY AV | <= .073 mg/L | all year |
| 103 | Benzoic acids, total | DAILY MX | <= .119 mg/L | all year |
| 103 | Alpha, gross particle activity | DAILY MX | <= 15 pCi/L | all year |
| 103 | Gross beta | DAILY MX | report only | all year |
| TX5 | Whole effluent toxicity - retest #1 | 48HR MIN | report only | all year |
| TX5 | Whole effluent toxicity - retest #1 | MO AV MN | report only | all year |
| TX5 | Whole effluent toxicity - retest #2 | 48HR MIN | report only | all year |
| TX5 | Whole effluent toxicity - retest #2 | MO AV MN | report only | all year |
| TX5 | Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 48HR MIN | report only | all year |
| TX5 | Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | MO AV MN | report only | all year |
| TX5 | LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 48HR MIN | report only | all year |
| TX5 | LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | MO AV MN | report only | all year |
| TX5 | NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 48HR MIN | report only | all year |
| TX5 | NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | MO AV MN | report only | all year |
| TX5 | NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 48HR MIN | report only | all year |
| TX5 | NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | MO AV MN | report only | all year |
| TX5 | LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex | 48HR MIN | report only | all year |
| TX5 | LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex | MO AV MN | report only | all year |
| TX5 | LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas | 48HR MIN | report only | all year |
| TX5 | LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas | MO AV MN | report only | all year |
| TXE | LC50 Pass/Fail Static 24Hr Acute D. Pulex | SINGSAMP | report only | all year |
| TXE | LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | SINGSAMP | report only | all year |
Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states