NPDES permit TX0103586 · Major NON-POTW · effective, expires 2026-10-06 · EPA's file as of 2026-09-19
Check this month's numbers before you fileLast period with anything received: 2026-07-31.
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 |
|---|---|---|---|---|
| 001 | Temperature, water deg. fahrenheit | DAILY AV | <= 105 deg F | all year |
| 001 | Temperature, water deg. fahrenheit | DAILY MX | <= 115 deg F | all year |
| 001 | pH | MINIMUM | >= 6 SU | all year |
| 001 | pH | MAXIMUM | <= 9 SU | all year |
| 001 | Nitrogen, ammonia total [as N] | DAILY AV | <= 1.5 mg/L | all year |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 3.1 mg/L | all year |
| 001 | Nitrogen, ammonia total [as N] | DAILY AV | <= 4.69 lb/d | all year |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 9.7 lb/d | all year |
| 001 | Phosphorus, total [as P] | DAILY MX | <= 6.26 lb/d | all year |
| 001 | Chromium, total [as Cr] | DAILY AV | <= .2 mg/L | all year |
| 001 | Chromium, total [as Cr] | DAILY MX | <= .2 mg/L | all year |
| 001 | Zinc, total [as Zn] | DAILY AV | <= .641 mg/L | all year |
| 001 | Zinc, total [as Zn] | DAILY MX | <= 1.35 mg/L | all year |
| 001 | Zinc, total [as Zn] | DAILY AV | <= 1.77 lb/d | all year |
| 001 | Zinc, total [as Zn] | DAILY MX | <= 3.74 lb/d | all year |
| 001 | Flow, in conduit or thru treatment plant | DAILY AV | <= .375 MGD | all year |
| 001 | Flow, in conduit or thru treatment plant | DAILY MX | <= .683 MGD | all year |
| 001 | Chlorine, free available | DAILY AV | <= .2 mg/L | all year |
| 001 | Chlorine, free available | DAILY MX | <= .5 mg/L | all year |
| 001 | Chlorine, free available | DAILY AV | <= .052 lb/d | all year |
| 001 | Chlorine, free available | DAILY MX | <= .13 lb/d | all year |
| 001 | E. coli | DAILY AV | report only | all year |
| 001 | E. coli | DAILY MX | report only | all year |
| 001 | Solids, total dissolved | DAILY MX | report only | all year |
| 001 | BOD, carbonaceous [5 day, 20 C] | DAILY AV | report only | all year |
| 001 | BOD, carbonaceous [5 day, 20 C] | DAILY MX | report only | all year |
| 001 | BOD, carbonaceous [5 day, 20 C] | DAILY AV | report only | all year |
| 001 | BOD, carbonaceous [5 day, 20 C] | DAILY MX | report only | all year |
| 002 | Oxygen demand, chem. [high level] [COD] | DAILY MX | <= 150 mg/L | 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 | 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 |
| 101 | Solids, total suspended | DAILY AV | <= 30 mg/L | all year |
| 101 | Solids, total suspended | DAILY MX | <= 100 mg/L | all year |
| 101 | Oil & Grease | DAILY AV | <= 15 mg/L | all year |
| 101 | Oil & Grease | DAILY MX | <= 20 mg/L | all year |
| 101 | Copper, total [as Cu] | DAILY AV | <= 1 mg/L | all year |
| 101 | Copper, total [as Cu] | DAILY MX | <= 1 mg/L | all year |
| 101 | Iron, total [as Fe] | DAILY AV | <= 1 mg/L | all year |
| 101 | Iron, total [as Fe] | DAILY MX | <= 1 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 |
| TX1 | Whole effluent toxicity - retest #1 | 48HR MIN | report only | all year |
| TX1 | Whole effluent toxicity - retest #1 | 48HR MIN | report only | all year |
| TX1 | Whole effluent toxicity - retest #1 | MO AV MN | report only | all year |
| TX1 | Whole effluent toxicity - retest #1 | MO AV MN | report only | all year |
| TX1 | Whole effluent toxicity - retest #2 | 48HR MIN | report only | all year |
| TX1 | Whole effluent toxicity - retest #2 | 48HR MIN | report only | all year |
| TX1 | Whole effluent toxicity - retest #2 | MO AV MN | report only | all year |
| TX1 | Whole effluent toxicity - retest #2 | MO AV MN | report only | all year |
| TX1 | Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 48HR MIN | report only | all year |
| TX1 | Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | MO AV MN | report only | all year |
| TX1 | LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 48HR MIN | report only | all year |
| TX1 | LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | MO AV MN | report only | all year |
| TX1 | NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 48HR MIN | report only | all year |
| TX1 | NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | MO AV MN | report only | all year |
| TX1 | NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 48HR MIN | report only | all year |
| TX1 | NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | MO AV MN | report only | all year |
| TX1 | LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex | 48HR MIN | report only | all year |
| TX1 | LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex | MO AV MN | report only | all year |
| TX1 | LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas | 48HR MIN | report only | all year |
| TX1 | LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas | 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 D. Pulex | SINGSAMP | report only | all year |
| TXA | 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