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Crude Petroleum And Natural Gas, major discharger, San Leon, Texas. NPDES permit TX0117757, in force until Jun 19, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 55 mg/L | all year | 001 |
| Copper, total [as Cu] | daily average | ≤ .0036 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .0077 mg/L | all year | 001 |
| Lead, total [as Pb] | daily average | ≤ .012 mg/L | all year | 001 |
| Lead, total [as Pb] | daily maximum | ≤ .026 mg/L | all year | 001 |
| Nickel, total [as Ni] | daily average | ≤ .011 mg/L | all year | 001 |
| Nickel, total [as Ni] | daily maximum | ≤ .024 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily average | ≤ .072 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .153 mg/L | all year | 001 |
| Aluminum, total [as Al] | daily average | ≤ .834 mg/L | all year | 001 |
| Aluminum, total [as Al] | daily maximum | ≤ 1.76 mg/L | all year | 001 |
| Benzene, ethylbenzene, toluene, xylene combination | daily maximum | ≤ .5 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Mercury, total [as Hg] | daily average | ≤ .000034 mg/L | all year | 001 |
| Mercury, total [as Hg] | daily maximum | ≤ .000073 mg/L | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 101 |
| pH | maximum | ≤ 9 SU | all year | 101 |
| Solids, total suspended | daily average | ≤ 30.6 mg/L | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 74.1 mg/L | all year | 101 |
| Solids, total suspended | daily average | ≤ 16.5 lb/d | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 40.1 lb/d | all year | 101 |
| Oil & Grease | daily average | ≤ 38 mg/L | all year | 101 |
| Oil & Grease | daily maximum | ≤ 127 mg/L | all year | 101 |
| Oil & Grease | daily average | ≤ 20.6 lb/d | all year | 101 |
| Oil & Grease | daily maximum | ≤ 68.8 lb/d | all year | 101 |
| Arsenic, total [as As] | daily average | ≤ .1 mg/L | all year | 101 |
| Arsenic, total [as As] | daily maximum | ≤ .3 mg/L | all year | 101 |
| Arsenic, total [as As] | daily average | ≤ .0542 lb/d | all year | 101 |
| Arsenic, total [as As] | daily maximum | ≤ .163 lb/d | all year | 101 |
| Cadmium, total [as Cd] | daily average | ≤ .0102 mg/L | all year | 101 |
| Cadmium, total [as Cd] | daily maximum | ≤ .0172 mg/L | all year | 101 |
| Cadmium, total [as Cd] | daily average | ≤ .0055 lb/d | all year | 101 |
| Cadmium, total [as Cd] | daily maximum | ≤ .0093 lb/d | all year | 101 |
| Chromium, total [as Cr] | daily average | ≤ .323 mg/L | all year | 101 |
| Chromium, total [as Cr] | daily maximum | ≤ .746 mg/L | all year | 101 |
| Chromium, total [as Cr] | daily average | ≤ .175 lb/d | all year | 101 |
| Chromium, total [as Cr] | daily maximum | ≤ .404 lb/d | all year | 101 |
| Cobalt, total [as Co] | daily average | ≤ 18.8 mg/L | all year | 101 |
| Cobalt, total [as Co] | daily maximum | ≤ 56.4 mg/L | all year | 101 |
| Cobalt, total [as Co] | daily average | ≤ 10.1 lb/d | all year | 101 |
| Cobalt, total [as Co] | daily maximum | ≤ 30.5 lb/d | all year | 101 |
| Copper, total [as Cu] | daily average | ≤ .242 mg/L | all year | 101 |
| Copper, total [as Cu] | daily maximum | ≤ .5 mg/L | all year | 101 |
| Copper, total [as Cu] | daily average | ≤ .131 lb/d | all year | 101 |
| Copper, total [as Cu] | daily maximum | ≤ .271 lb/d | all year | 101 |
| Lead, total [as Pb] | daily average | ≤ .16 mg/L | all year | 101 |
| Lead, total [as Pb] | daily maximum | ≤ .35 mg/L | all year | 101 |
| Lead, total [as Pb] | daily average | ≤ .086 lb/d | all year | 101 |
| Lead, total [as Pb] | daily maximum | ≤ .189 lb/d | all year | 101 |
| Zinc, total [as Zn] | daily average | ≤ 1 mg/L | all year | 101 |
| Zinc, total [as Zn] | daily maximum | ≤ 6 mg/L | all year | 101 |
| Zinc, total [as Zn] | daily average | ≤ .542 lb/d | all year | 101 |
| Zinc, total [as Zn] | daily maximum | ≤ 3.25 lb/d | all year | 101 |
| Tin, total [as Sn] | daily average | ≤ .165 mg/L | all year | 101 |
| Tin, total [as Sn] | daily maximum | ≤ .335 mg/L | all year | 101 |
| Tin, total [as Sn] | daily average | ≤ .089 lb/d | all year | 101 |
| Tin, total [as Sn] | per discharge | ≤ .181 lb/d | all year | 101 |
| Butyl benzyl phthalate | daily average | ≤ .0887 mg/L | all year | 101 |
| Butyl benzyl phthalate | daily maximum | ≤ .188 mg/L | all year | 101 |
| Butyl benzyl phthalate | daily average | ≤ .048 lb/d | all year | 101 |
| Butyl benzyl phthalate | daily maximum | ≤ .101 lb/d | all year | 101 |
| Fluoranthene | daily average | ≤ .0268 mg/L | all year | 101 |
| Fluoranthene | daily maximum | ≤ .0537 mg/L | all year | 101 |
| Fluoranthene | daily average | ≤ .014 lb/d | all year | 101 |
| Fluoranthene | daily maximum | ≤ .029 lb/d | all year | 101 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily average | ≤ .101 mg/L | all year | 101 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | ≤ .215 mg/L | all year | 101 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily average | ≤ .054 lb/d | all year | 101 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | ≤ .116 lb/d | all year | 101 |
| Petrol hydrocarbons, total recoverable | daily average | report only (mg/L) | all year | 101 |
| Petrol hydrocarbons, total recoverable | daily maximum | report only (mg/L) | all year | 101 |
| Petrol hydrocarbons, total recoverable | daily average | report only (lb/d) | all year | 101 |
| Petrol hydrocarbons, total recoverable | daily maximum | report only (lb/d) | all year | 101 |
| Flow, in conduit or thru treatment plant | daily average | ≤ .065 MGD | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ .105 MGD | all year | 101 |
| Mercury, total [as Hg] | daily average | ≤ .005 mg/L | all year | 101 |
| Mercury, total [as Hg] | daily maximum | ≤ .01 mg/L | all year | 101 |
| Mercury, total [as Hg] | daily average | ≤ .0027 lb/d | all year | 101 |
| Mercury, total [as Hg] | daily maximum | ≤ .0054 lb/d | all year | 101 |
| n-Decane | daily average | ≤ .437 mg/L | all year | 101 |
| n-Decane | daily maximum | ≤ .948 mg/L | all year | 101 |
| n-Decane | daily average | ≤ .237 lb/d | all year | 101 |
| n-Decane | daily maximum | ≤ .514 lb/d | all year | 101 |
| Carbazole | daily average | ≤ .276 mg/L | all year | 101 |
| Carbazole | daily maximum | ≤ .598 mg/L | all year | 101 |
| Carbazole | daily average | ≤ .149 lb/d | all year | 101 |
| Carbazole | daily maximum | ≤ .324 lb/d | all year | 101 |
| n-Octadecane | daily average | ≤ .302 mg/L | all year | 101 |
| n-Octadecane | daily maximum | ≤ .589 mg/L | all year | 101 |
| n-Octadecane | daily average | ≤ .163 lb/d | all year | 101 |
| n-Octadecane | daily maximum | ≤ .319 lb/d | all year | 101 |
| pH | minimum | ≥ 6 SU | all year | 102 |
| pH | maximum | ≤ 9 SU | all year | 102 |
| Solids, total suspended | daily average | ≤ 30.6 mg/L | all year | 102 |
| Solids, total suspended | daily maximum | ≤ 74.1 mg/L | all year | 102 |
| Solids, total suspended | daily average | ≤ 10.2 lb/d | all year | 102 |
| Solids, total suspended | daily maximum | ≤ 24.7 lb/d | all year | 102 |
| Oil & Grease | daily average | ≤ 38 mg/L | all year | 102 |
| Oil & Grease | daily maximum | ≤ 127 mg/L | all year | 102 |
| Oil & Grease | daily average | ≤ 12.6 lb/d | all year | 102 |
| Oil & Grease | daily maximum | ≤ 42.3 lb/d | all year | 102 |
| Arsenic, total [as As] | daily average | ≤ .1 mg/L | all year | 102 |
| Arsenic, total [as As] | daily maximum | ≤ .3 mg/L | all year | 102 |
| Arsenic, total [as As] | daily average | ≤ .0334 lb/d | all year | 102 |
| Arsenic, total [as As] | daily maximum | ≤ .1 lb/d | all year | 102 |
| Cadmium, total [as Cd] | daily average | ≤ .0102 mg/L | all year | 102 |
| Cadmium, total [as Cd] | daily maximum | ≤ .0172 mg/L | all year | 102 |
| Cadmium, total [as Cd] | daily average | ≤ .0034 lb/d | all year | 102 |
| Cadmium, total [as Cd] | daily maximum | ≤ .0057 lb/d | all year | 102 |
| Chromium, total [as Cr] | daily average | ≤ .323 mg/L | all year | 102 |
| Chromium, total [as Cr] | daily maximum | ≤ .746 mg/L | all year | 102 |
| Chromium, total [as Cr] | daily average | ≤ .107 lb/d | all year | 102 |
| Chromium, total [as Cr] | daily maximum | ≤ .249 lb/d | all year | 102 |
| Cobalt, total [as Co] | daily average | ≤ 18.8 mg/L | all year | 102 |
| Cobalt, total [as Co] | daily maximum | ≤ 56.4 mg/L | all year | 102 |
| Cobalt, total [as Co] | daily average | ≤ 6.27 lb/d | all year | 102 |
| Cobalt, total [as Co] | daily maximum | ≤ 18.8 lb/d | all year | 102 |
| Copper, total [as Cu] | daily average | ≤ .242 mg/L | all year | 102 |
| Copper, total [as Cu] | daily maximum | ≤ .5 mg/L | all year | 102 |
| Copper, total [as Cu] | daily average | ≤ .08 lb/d | all year | 102 |
| Copper, total [as Cu] | daily maximum | ≤ .166 lb/d | all year | 102 |
| Lead, total [as Pb] | daily average | ≤ .16 mg/L | all year | 102 |
| Lead, total [as Pb] | daily maximum | ≤ .35 mg/L | all year | 102 |
| Lead, total [as Pb] | daily average | ≤ .053 lb/d | all year | 102 |
| Lead, total [as Pb] | daily maximum | ≤ .116 lb/d | all year | 102 |
| Zinc, total [as Zn] | daily average | ≤ 1 mg/L | all year | 102 |
| Zinc, total [as Zn] | daily maximum | ≤ 6 mg/L | all year | 102 |
| Zinc, total [as Zn] | daily average | ≤ .334 lb/d | all year | 102 |
| Zinc, total [as Zn] | daily maximum | ≤ 2 lb/d | all year | 102 |
| Tin, total [as Sn] | daily average | ≤ .165 mg/L | all year | 102 |
| Tin, total [as Sn] | daily maximum | ≤ .335 mg/L | all year | 102 |
| Tin, total [as Sn] | daily average | ≤ .055 lb/d | all year | 102 |
| Tin, total [as Sn] | per discharge | ≤ .111 lb/d | all year | 102 |
| Butyl benzyl phthalate | daily average | ≤ .0887 mg/L | all year | 102 |
| Butyl benzyl phthalate | daily maximum | ≤ .188 mg/L | all year | 102 |
| Butyl benzyl phthalate | daily average | ≤ .029 lb/d | all year | 102 |
| Butyl benzyl phthalate | daily maximum | ≤ .062 lb/d | all year | 102 |
| Fluoranthene | daily average | ≤ .0268 mg/L | all year | 102 |
| Fluoranthene | daily maximum | ≤ .0537 mg/L | all year | 102 |
| Fluoranthene | daily average | ≤ .0089 lb/d | all year | 102 |
| Fluoranthene | daily maximum | ≤ .018 lb/d | all year | 102 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily average | ≤ .101 mg/L | all year | 102 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | ≤ .215 mg/L | all year | 102 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily average | ≤ .033 lb/d | all year | 102 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | ≤ .071 lb/d | all year | 102 |
| Petrol hydrocarbons, total recoverable | daily average | report only (mg/L) | all year | 102 |
| Petrol hydrocarbons, total recoverable | daily maximum | report only (mg/L) | all year | 102 |
| Petrol hydrocarbons, total recoverable | daily average | report only (lb/d) | all year | 102 |
| Petrol hydrocarbons, total recoverable | daily maximum | report only (lb/d) | all year | 102 |
| Flow, in conduit or thru treatment plant | daily average | ≤ .04 MGD | all year | 102 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ .05 MGD | all year | 102 |
| Mercury, total [as Hg] | daily average | ≤ .005 mg/L | all year | 102 |
| Mercury, total [as Hg] | daily maximum | ≤ .01 mg/L | all year | 102 |
| Mercury, total [as Hg] | daily average | ≤ .0017 lb/d | all year | 102 |
| Mercury, total [as Hg] | daily maximum | ≤ .0033 lb/d | all year | 102 |
| n-Decane | daily average | ≤ .437 mg/L | all year | 102 |
| n-Decane | daily maximum | ≤ .948 mg/L | all year | 102 |
| n-Decane | daily average | ≤ .145 lb/d | all year | 102 |
| n-Decane | daily maximum | ≤ .316 lb/d | all year | 102 |
| Carbazole | daily average | ≤ .276 mg/L | all year | 102 |
| Carbazole | daily maximum | ≤ .598 mg/L | all year | 102 |
| Carbazole | daily average | ≤ .092 lb/d | all year | 102 |
| Carbazole | daily maximum | ≤ .199 lb/d | all year | 102 |
| n-Octadecane | daily average | ≤ .302 mg/L | all year | 102 |
| n-Octadecane | daily maximum | ≤ .589 mg/L | all year | 102 |
| n-Octadecane | daily average | ≤ .1 lb/d | all year | 102 |
| n-Octadecane | daily maximum | ≤ .196 lb/d | all year | 102 |
| 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 #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 [WET] - Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | ≥ 100 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | ≥ 100 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | ≥ 80 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | ≥ 80 % | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Growth 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 30 Oil and Gas Extraction permits in Texas.
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Your permit document is the final word. As JSON: /api/v1/permits/TX0117757 · MCP: https://passage-data.com/mcp