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Alkalies And Chlorine, major discharger, La Porte, Texas. NPDES permit TX0008150 expired Jul 25, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | ≤ 105 deg F | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily average | ≤ 600 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 1500 lb/d | all year | 001 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 001 |
| Copper, total [as Cu] | daily average | ≤ .025 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .052 mg/L | all year | 001 |
| Copper, total [as Cu] | daily average | ≤ .473 lb/d | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .999 lb/d | all year | 001 |
| Lead, total [as Pb] | daily average | ≤ .047 mg/L | all year | 001 |
| Lead, total [as Pb] | daily maximum | ≤ .099 mg/L | all year | 001 |
| Lead, total [as Pb] | daily average | ≤ .876 lb/d | all year | 001 |
| Lead, total [as Pb] | daily maximum | ≤ 1.86 lb/d | all year | 001 |
| Nickel, total [as Ni] | daily average | ≤ .049 mg/L | all year | 001 |
| Nickel, total [as Ni] | daily maximum | ≤ .104 mg/L | all year | 001 |
| Nickel, total [as Ni] | daily average | ≤ .946 lb/d | all year | 001 |
| Nickel, total [as Ni] | daily maximum | ≤ 1.98 lb/d | all year | 001 |
| Zinc, total [as Zn] | daily average | ≤ .2 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .425 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily average | ≤ 3.59 lb/d | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ 7.59 lb/d | all year | 001 |
| Flow, in conduit or thru treatment plant | daily average | ≤ 2.4 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | daily average | ≤ 10.2 lb/d | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 16.8 lb/d | all year | 001 |
| Solids, total dissolved | daily maximum | ≤ 55000 mg/L | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9.5 SU | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 002 |
| Zinc, total [as Zn] | daily average | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .1 mg/L | all year | 002 |
| Chlorine, total residual | daily average | report only (lb/d) | all year | 002 |
| Chlorine, total residual | daily maximum | report only (lb/d) | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 65 mg/L | all year | 201 |
| Flow, in conduit or thru treatment plant | daily average | ≤ .015 MGD | all year | 201 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ .03 MGD | all year | 201 |
| Chlorine, total residual | monthly minimum | ≥ 1 mg/L | all year | 201 |
| Enterococci | daily average | ≤ 35 CFU/100mL | all year | 201 |
| Enterococci | daily maximum | ≤ 104 CFU/100mL | all year | 201 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (M. bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (M. bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| Whole effluent toxicity - retest #1 | single sample | report only (pass=0;fail=1) | all year | TXA |
| Whole effluent toxicity - retest #2 | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | single sample | report only (pass=0;fail=1) | all year | TXA |
Cited limits by parameter: Texas's rules and the federal ones.
Same industry: the 165 Chemicals and Allied Products permits in Texas.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/TX0008150 · MCP: https://passage-data.com/mcp