NPDES permit TX0006009 · Major NON-POTW · effective, expires 2029-10-29 · EPA's file as of 2026-09-19
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Last period with anything received: 2026-07-31.
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 |
|---|---|---|---|---|
| 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 |
| 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 | 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 | Oxygen demand, chem. [high level] [COD] | DAILY MX | <= 200 mg/L | 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 | 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 | Oxygen demand, chem. [high level] [COD] | DAILY MX | <= 200 mg/L | all year |
| 007 | pH | MINIMUM | >= 6 SU | all year |
| 007 | pH | MAXIMUM | <= 9 SU | all year |
| 007 | Oil & Grease | DAILY MX | <= 15 mg/L | 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 |
| 009 | Temperature, water deg. fahrenheit | DAILY AV | report only | all year |
| 009 | Temperature, water deg. fahrenheit | DAILY MX | <= 110 deg F | all year |
| 009 | Oxygen demand, chem. [high level] [COD] | DAILY AV | report only | all year |
| 009 | Oxygen demand, chem. [high level] [COD] | DAILY MX | report only | all year |
| 009 | Oxygen demand, chem. [high level] [COD] | DAILY AV | <= 13748 lb/d | all year |
| 009 | Oxygen demand, chem. [high level] [COD] | DAILY MX | <= 26510 lb/d | all year |
| 009 | pH | MINIMUM | >= 5 SU | all year |
| 009 | pH | MAXIMUM | <= 11 SU | all year |
| 009 | Solids, total suspended | DAILY AV | report only | all year |
| 009 | Solids, total suspended | DAILY MX | report only | all year |
| 009 | Solids, total suspended | DAILY AV | <= 1673 lb/d | all year |
| 009 | Solids, total suspended | DAILY MX | <= 2678 lb/d | all year |
| 009 | Oil & Grease | DAILY AV | report only | all year |
| 009 | Oil & Grease | DAILY MX | report only | all year |
| 009 | Oil & Grease | DAILY AV | <= 605 lb/d | all year |
| 009 | Oil & Grease | DAILY MX | <= 1119 lb/d | all year |
| 009 | Nitrogen, ammonia total [as N] | DAILY AV | report only | all year |
| 009 | Nitrogen, ammonia total [as N] | DAILY MX | report only | all year |
| 009 | Nitrogen, ammonia total [as N] | DAILY AV | <= 300 lb/d | all year |
| 009 | Nitrogen, ammonia total [as N] | DAILY MX | <= 600 lb/d | all year |
| 009 | Sulfide, total [as S] | DAILY AV | report only | all year |
| 009 | Sulfide, total [as S] | DAILY MX | report only | all year |
| 009 | Sulfide, total [as S] | DAILY AV | <= 12.2 lb/d | all year |
| 009 | Sulfide, total [as S] | DAILY MX | <= 27 lb/d | all year |
| 009 | Chromium, hexavalent [as Cr] | DAILY AV | report only | all year |
| 009 | Chromium, hexavalent [as Cr] | DAILY MX | report only | all year |
| 009 | Chromium, hexavalent [as Cr] | DAILY AV | <= 3.6 lb/d | all year |
| 009 | Chromium, hexavalent [as Cr] | DAILY MX | <= 6.8 lb/d | all year |
| 009 | Chromium, total [as Cr] | DAILY AV | report only | all year |
| 009 | Chromium, total [as Cr] | DAILY MX | report only | all year |
| 009 | Chromium, total [as Cr] | DAILY AV | <= 16.7 lb/d | all year |
| 009 | Chromium, total [as Cr] | DAILY MX | <= 35.5 lb/d | all year |
| 009 | Phenols | DAILY AV | report only | all year |
| 009 | Phenols | DAILY MX | report only | all year |
| 009 | Phenols | DAILY AV | <= 12.7 lb/d | all year |
| 009 | Phenols | DAILY MX | <= 26.2 lb/d | all year |
| 009 | Flow, in conduit or thru treatment plant | DAILY AV | <= 4.5 MGD | all year |
| 009 | Flow, in conduit or thru treatment plant | DAILY MX | <= 6 MGD | all year |
| 009 | BOD, carbonaceous [5 day, 20 C] | DAILY AV | <= 40 mg/L | all year |
| 009 | BOD, carbonaceous [5 day, 20 C] | DAILY MX | report only | all year |
| 009 | BOD, carbonaceous [5 day, 20 C] | DAILY AV | <= 1502 lb/d | all year |
| 009 | BOD, carbonaceous [5 day, 20 C] | DAILY MX | <= 3004 lb/d | all year |
| 009 | pH range excursions, > 60 minutes | MO TOTAL | <= 0 occur/mo | all year |
| 009 | pH range excursions, monthly total accum | MO TOTAL | <= 446 min | all year |
| TX9 | Whole effluent toxicity - retest #1 | 7 DA MIN | report only | all year |
| TX9 | Whole effluent toxicity - retest #1 | MO AV MN | report only | all year |
| TX9 | Whole effluent toxicity - retest #2 | 7 DA MIN | report only | all year |
| TX9 | Whole effluent toxicity - retest #2 | MO AV MN | report only | all year |
| TX9 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | >= 5.7 % | all year |
| TX9 | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | >= 5.7 % | all year |
| TX9 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX9 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | MO AV MN | report only | all year |
| TX9 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX9 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TX9 | NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX9 | NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX9 | NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX9 | NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TX9 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX9 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX9 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX9 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TX9 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX9 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX9 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX9 | Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TX9 | LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX9 | LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | MO AV MN | report only | all year |
| TX9 | LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX9 | LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TX9 | LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7 DA MIN | report only | all year |
| TX9 | LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | MO AV MN | report only | all year |
| TX9 | LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | 7 DA MIN | report only | all year |
| TX9 | LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | MO AV MN | report only | all year |
| TXI | Whole effluent toxicity - retest #1 | SINGSAMP | report only | all year |
| TXI | Whole effluent toxicity - retest #2 | SINGSAMP | report only | all year |
| TXI | Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | SINGSAMP | <= 100 % | all year |
| TXI | LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | SINGSAMP | report only | all year |
| TXI | LC50 Pass/Fail Static 24Hr Acute Menidia beryllina | SINGSAMP | report only | all year |
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