NPDES permit TX0003522 · Major NON-POTW · effective, expires 2027-03-28 · EPA's file as of 2026-09-19
Check this month's numbers before you fileLast period with anything received: 2026-07-31. Most often over: Enterococci (1), pH (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 |
|---|---|---|---|---|
| 001 | Oxygen, dissolved [DO] | MO MIN | report only | all year |
| 001 | BOD, 5-day, 20 deg. C | DAILY AV | <= 4171 lb/d | all year |
| 001 | BOD, 5-day, 20 deg. C | DAILY MX | <= 8342 lb/d | all year |
| 001 | pH | MINIMUM | >= 6 SU | all year |
| 001 | pH | MAXIMUM | <= 9 SU | all year |
| 001 | Nitrogen, ammonia total [as N] | DAILY AV | <= 2174 lb/d | all year |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 4348 lb/d | all year |
| 001 | Chromium, hexavalent [as Cr] | DAILY AV | <= 1.01 mg/L | all year |
| 001 | Chromium, hexavalent [as Cr] | DAILY MX | <= 2.14 mg/L | all year |
| 001 | Chromium, hexavalent [as Cr] | DAILY AV | report only | all year |
| 001 | Chromium, hexavalent [as Cr] | DAILY MX | report only | all year |
| 001 | Zinc, total [as Zn] | DAILY AV | <= 1.25 mg/L | all year |
| 001 | Zinc, total [as Zn] | DAILY MX | <= 2.65 mg/L | all year |
| 001 | Zinc, total [as Zn] | DAILY AV | <= 263 lb/d | all year |
| 001 | Zinc, total [as Zn] | DAILY MX | <= 557 lb/d | all year |
| 001 | Flow, in conduit or thru treatment plant | DAILY AV | <= 25.2 MGD | all year |
| 001 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 001 | Enterococci | DAILY AV | <= 35 CFU/100mL | all year |
| 001 | Enterococci | DAILY MX | <= 89 CFU/100mL | all year |
| 002 | BOD, 5-day, 20 deg. C | DAILY MX | report only | all year |
| 002 | pH | MINIMUM | >= 6 SU | all year |
| 002 | pH | MAXIMUM | <= 9 SU | all year |
| 002 | Solids, total suspended | DAILY MX | <= 100 mg/L | all year |
| 002 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 002 | Nitrogen, ammonia total [as N] | DAILY MX | report only | all year |
| 002 | Aluminum, total [as Al] | DAILY AV | report only | all year |
| 002 | Aluminum, total [as Al] | DAILY MX | report only | 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 | BOD, 5-day, 20 deg. C | DAILY MX | report only | 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 | Nitrogen, ammonia total [as N] | DAILY MX | report only | 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 |
| 005 | Oxygen, dissolved [DO] | MO MIN | >= 3 mg/L | all year |
| 005 | BOD, 5-day, 20 deg. C | DAILY AV | report only | all year |
| 005 | BOD, 5-day, 20 deg. C | DAILY MX | report only | all year |
| 005 | BOD, 5-day, 20 deg. C | DAILY AV | <= 3620 lb/d | all year |
| 005 | BOD, 5-day, 20 deg. C | DAILY MX | <= 7240 lb/d | all year |
| 005 | pH | MINIMUM | >= 6 SU | all year |
| 005 | pH | MAXIMUM | <= 9 SU | all year |
| 005 | Nitrogen, ammonia total [as N] | DAILY AV | report only | all year |
| 005 | Nitrogen, ammonia total [as N] | DAILY MX | report only | all year |
| 005 | Nitrogen, ammonia total [as N] | DAILY AV | <= 2020 lb/d | all year |
| 005 | Nitrogen, ammonia total [as N] | DAILY MX | <= 4040 lb/d | all year |
| 005 | Chromium, hexavalent [as Cr] | DAILY AV | <= .012 mg/L | all year |
| 005 | Chromium, hexavalent [as Cr] | DAILY MX | <= .0254 mg/L | all year |
| 005 | Chromium, hexavalent [as Cr] | DAILY AV | <= 2.3 lb/d | all year |
| 005 | Chromium, hexavalent [as Cr] | DAILY MX | <= 4.88 lb/d | all year |
| 005 | Zinc, total [as Zn] | DAILY AV | <= .461 mg/L | all year |
| 005 | Zinc, total [as Zn] | DAILY MX | <= .975 mg/L | all year |
| 005 | Zinc, total [as Zn] | DAILY AV | report only | all year |
| 005 | Zinc, total [as Zn] | DAILY MX | report only | all year |
| 005 | Selenium, total [as Se] | DAILY AV | <= .01685 mg/L | all year |
| 005 | Selenium, total [as Se] | DAILY MX | <= .0356 mg/L | all year |
| 005 | Selenium, total [as Se] | DAILY AV | report only | all year |
| 005 | Selenium, total [as Se] | DAILY MX | report only | 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 |
| 005 | Enterococci | DAILY AV | <= 35 CFU/100mL | all year |
| 005 | Enterococci | DAILY MX | <= 89 CFU/100mL | all year |
| 007 | pH | MINIMUM | >= 6 SU | all year |
| 007 | pH | MAXIMUM | <= 9 SU | all year |
| 007 | Oil & Grease | DAILY AV | <= 10 mg/L | all year |
| 007 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 007 | Carbon, tot organic [TOC] | DAILY AV | <= 30 mg/L | all year |
| 007 | Carbon, tot organic [TOC] | DAILY MX | <= 100 mg/L | all year |
| 007 | Flow, in conduit or thru treatment plant | DAILY AV | <= 6.2 MGD | all year |
| 007 | Flow, in conduit or thru treatment plant | DAILY MX | <= 12.4 MGD | all year |
| 007 | Chlorine, total residual | MO MAX | <= .1 mg/L | all year |
| 010 | BOD, 5-day, 20 deg. C | DAILY AV | report only | all year |
| 010 | BOD, 5-day, 20 deg. C | DAILY MX | report only | all year |
| 010 | pH | MINIMUM | >= 6 SU | all year |
| 010 | pH | MAXIMUM | <= 9 SU | all year |
| 010 | Oil & Grease | DAILY MX | <= 15 mg/L | all year |
| 010 | Nitrogen, ammonia total [as N] | DAILY MX | report only | all year |
| 010 | Carbon, tot organic [TOC] | DAILY MX | <= 55 mg/L | all year |
| 010 | Flow, in conduit or thru treatment plant | DAILY AV | report only | all year |
| 010 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 011 | Oxygen, dissolved [DO] | MO MIN | report only | all year |
| 011 | BOD, 5-day, 20 deg. C | DAILY AV | report only | all year |
| 011 | BOD, 5-day, 20 deg. C | DAILY MX | report only | all year |
| 011 | BOD, 5-day, 20 deg. C | DAILY AV | <= 4171 lb/d | all year |
| 011 | BOD, 5-day, 20 deg. C | DAILY MX | <= 8342 lb/d | all year |
| 011 | pH | MINIMUM | >= 6 SU | all year |
| 011 | pH | MAXIMUM | <= 9 SU | all year |
| 011 | Nitrogen, ammonia total [as N] | DAILY AV | report only | all year |
| 011 | Nitrogen, ammonia total [as N] | DAILY MX | report only | all year |
| 011 | Nitrogen, ammonia total [as N] | DAILY AV | <= 2174 lb/d | all year |
| 011 | Nitrogen, ammonia total [as N] | DAILY MX | <= 4348 lb/d | all year |
| 011 | Chromium, hexavalent [as Cr] | DAILY AV | <= .404 mg/L | all year |
| 011 | Chromium, hexavalent [as Cr] | DAILY MX | <= .855 mg/L | all year |
| 011 | Chromium, hexavalent [as Cr] | DAILY AV | <= 84 lb/d | all year |
| 011 | Chromium, hexavalent [as Cr] | DAILY MX | <= 179 lb/d | all year |
| 011 | Zinc, total [as Zn] | DAILY AV | report only | all year |
| 011 | Zinc, total [as Zn] | DAILY MX | report only | all year |
| 011 | Zinc, total [as Zn] | DAILY AV | report only | all year |
| 011 | Zinc, total [as Zn] | DAILY MX | report only | all year |
| 011 | Selenium, total [as Se] | DAILY AV | report only | all year |
| 011 | Selenium, total [as Se] | DAILY MX | report only | all year |
| 011 | Selenium, total [as Se] | DAILY AV | report only | all year |
| 011 | Selenium, total [as Se] | DAILY MX | report only | all year |
| 011 | Flow, in conduit or thru treatment plant | DAILY AV | <= 25.2 MGD | all year |
| 011 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 011 | Enterococci | DAILY AV | <= 35 CFU/100mL | all year |
| 011 | Enterococci | DAILY MX | <= 89 CFU/100mL | all year |
| 101 | BOD, 5-day, 20 deg. C | DAILY AV | <= 3620 lb/d | all year |
| 101 | BOD, 5-day, 20 deg. C | DAILY MX | <= 7240 lb/d | all year |
| 101 | pH | MINIMUM | >= 6 SU | all year |
| 101 | pH | MAXIMUM | <= 9 SU | all year |
| 101 | Solids, total suspended | DAILY AV | <= 5119 lb/d | all year |
| 101 | Solids, total suspended | DAILY MX | <= 8307 lb/d | all year |
| 101 | Oil & Grease | DAILY AV | <= 1583 lb/d | all year |
| 101 | Oil & Grease | DAILY MX | <= 2962 lb/d | all year |
| 101 | Nitrogen, ammonia total [as N] | DAILY AV | <= 2020 lb/d | all year |
| 101 | Nitrogen, ammonia total [as N] | DAILY MX | <= 4040 lb/d | all year |
| 101 | Carbon, tot organic [TOC] | DAILY AV | <= 10892 lb/d | all year |
| 101 | Carbon, tot organic [TOC] | DAILY MX | <= 20188 lb/d | all year |
| 101 | Sulfide, total [as S] | DAILY AV | <= 20 lb/d | all year |
| 101 | Sulfide, total [as S] | DAILY MX | <= 44.7 lb/d | all year |
| 101 | Chromium, hexavalent [as Cr] | DAILY AV | <= 3.1 lb/d | all year |
| 101 | Chromium, hexavalent [as Cr] | DAILY MX | <= 6.9 lb/d | all year |
| 101 | Chromium, total [as Cr] | DAILY AV | <= 33 lb/d | all year |
| 101 | Chromium, total [as Cr] | DAILY MX | <= 95 lb/d | all year |
| 101 | Phenolics, total recoverable | DAILY AV | <= 27.7 lb/d | all year |
| 101 | Phenolics, total recoverable | DAILY MX | <= 67 lb/d | 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 | <= 64.8 MGD | 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 #2 | 48HR MIN | report only | all year |
| TX1 | Whole effluent toxicity - retest #2 | MO AV MN | report only | all year |
| TX1 | LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia) | 48HR MIN | report only | all year |
| TX1 | LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia) | MO AV MN | report only | all year |
| TX1 | Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia menidia | 48HR MIN | report only | all year |
| TX1 | Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia menidia | MO AV MN | report only | all year |
| TX1 | NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia) | 48HR MIN | report only | all year |
| TX1 | NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX1 | NOAEC Lethal Static Renewal 48HR Acute Menidia menidia | 48HR MIN | report only | all year |
| TX1 | NOAEC Lethal Static Renewal 48HR Acute Menidia menidia | MO AV MN | report only | all year |
| TX1 | LOAEC Lethal Survival Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 48HR MIN | report only | all year |
| TX1 | LOAEC Lethal Survival Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX1 | LOAEC Survival Static Renewal 48HR Acute Menidia menidia | 48HR MIN | report only | all year |
| TX1 | LOAEC Survival Static Renewal 48HR Acute Menidia menidia | 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 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | SINGSAMP | <= 100 % | 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 menidia | SINGSAMP | report only | all year |
| TXE | Whole effluent toxicity - retest #1 | SINGSAMP | report only | all year |
| TXE | Whole effluent toxicity - retest #2 | SINGSAMP | report only | all year |
| TXE | LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 2E | report only | all year |
| TXE | LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | SINGSAMP | report only | all year |
| TXE | LC50 Pass/Fail Static 24Hr Acute Menidia menidia | 2E | report only | all year |
| TXE | LC50 Pass/Fail Static 24Hr Acute Menidia menidia | 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