Exxon Mobil Corporation — NPDES permit TX0007013: limits, due date and EPA's record

Industrial Organic Chemicals, Baytown, Texas. NPDES permit TX0007013 expired Aug 19, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (244)

Parameter	Statistic	Limit	Months	Outfall
BOD, 5-day, 20 deg. C	daily average	≤ 30 mg/L	all year	003
BOD, 5-day, 20 deg. C	daily maximum	≤ 80 mg/L	all year	003
pH	minimum	≥ 6 SU	all year	003
pH	maximum	≤ 9 SU	all year	003
Solids, total suspended	daily average	≤ 127 mg/L	all year	003
Solids, total suspended	daily maximum	≤ 283 mg/L	all year	003
Oil & Grease	daily maximum	≤ 15 mg/L	all year	003
Carbon, tot organic [TOC]	daily maximum	≤ 55 mg/L	all year	003
Copper, total [as Cu]	daily average	≤ .00657 mg/L	all year	003
Copper, total [as Cu]	daily maximum	≤ .0139 mg/L	all year	003
Lead, total [as Pb]	daily average	report only (mg/L)	all year	003
Lead, total [as Pb]	daily maximum	report only (mg/L)	all year	003
Zinc, total [as Zn]	daily average	≤ .0722 mg/L	all year	003
Zinc, total [as Zn]	daily maximum	≤ .152 mg/L	all year	003
Carbon tetrachloride	daily average	≤ .015 mg/L	all year	003
Carbon tetrachloride	daily maximum	≤ .032 mg/L	all year	003
1,2-Dichloroethane	daily average	≤ .135 mg/L	all year	003
1,2-Dichloroethane	daily maximum	≤ .285 mg/L	all year	003
Chloroform	daily average	≤ .111 mg/L	all year	003
Chloroform	daily maximum	≤ .325 mg/L	all year	003
Toluene	daily average	≤ .028 mg/L	all year	003
Toluene	daily maximum	≤ .074 mg/L	all year	003
Benzene	daily average	≤ .057 mg/L	all year	003
Benzene	daily maximum	≤ .134 mg/L	all year	003
Acenaphthylene	daily average	≤ .019 mg/L	all year	003
Acenaphthylene	daily maximum	≤ .047 mg/L	all year	003
Acenaphthene	daily average	≤ .019 mg/L	all year	003
Acenaphthene	daily maximum	≤ .047 mg/L	all year	003
Acrylonitrile	daily average	≤ .0101 mg/L	all year	003
Acrylonitrile	daily maximum	≤ .0215 mg/L	all year	003
Anthracene	daily average	≤ .019 mg/L	all year	003
Anthracene	daily maximum	≤ .047 mg/L	all year	003
Benzo[b]fluoranthene	daily average	≤ .02 mg/L	all year	003
Benzo[b]fluoranthene	daily maximum	≤ .048 mg/L	all year	003
Benzo[k]fluoranthene	daily average	≤ .019 mg/L	all year	003
Benzo[k]fluoranthene	daily maximum	≤ .047 mg/L	all year	003
Benzo[a]pyrene	daily average	≤ .0015 mg/L	all year	003
Benzo[a]pyrene	daily maximum	≤ .0031 mg/L	all year	003
Chlorobenzene	daily average	≤ .142 mg/L	all year	003
Chlorobenzene	daily maximum	≤ .38 mg/L	all year	003
Chrysene	daily average	≤ .015 mg/L	all year	003
Chrysene	daily maximum	≤ .031 mg/L	all year	003
Diethyl phthalate	daily average	≤ .046 mg/L	all year	003
Diethyl phthalate	daily maximum	≤ .113 mg/L	all year	003
Dimethyl phthalate	daily average	≤ .019 mg/L	all year	003
Dimethyl phthalate	daily maximum	≤ .047 mg/L	all year	003
Ethylbenzene	daily average	≤ .142 mg/L	all year	003
Ethylbenzene	daily maximum	≤ .38 mg/L	all year	003
Fluoranthene	daily average	≤ .022 mg/L	all year	003
Fluoranthene	daily maximum	≤ .054 mg/L	all year	003
Fluorene	daily average	≤ .019 mg/L	all year	003
Fluorene	daily maximum	≤ .047 mg/L	all year	003
Hexachlorobutadiene	daily average	≤ .0067 mg/L	all year	003
Hexachlorobutadiene	daily maximum	≤ .014 mg/L	all year	003
Hexachloroethane	daily average	≤ .17 mg/L	all year	003
Hexachloroethane	daily maximum	≤ .359 mg/L	all year	003
Methyl chloride [Chloromethane]	daily average	≤ .11 mg/L	all year	003
Methyl chloride [Chloromethane]	daily maximum	≤ .295 mg/L	all year	003
Methylene chloride	daily average	≤ .036 mg/L	all year	003
Methylene chloride	daily maximum	≤ .17 mg/L	all year	003
Nitrobenzene	daily average	≤ .427 mg/L	all year	003
Nitrobenzene	daily maximum	≤ .902 mg/L	all year	003
Phenanthrene	daily average	≤ .0036 mg/L	all year	003
Phenanthrene	daily maximum	≤ .0077 mg/L	all year	003
Pyrene	daily average	≤ .02 mg/L	all year	003
Pyrene	daily maximum	≤ .048 mg/L	all year	003
Tetrachloroethylene	daily average	≤ .052 mg/L	all year	003
Tetrachloroethylene	daily maximum	≤ .164 mg/L	all year	003
1,1-Dichloroethane	daily average	≤ .022 mg/L	all year	003
1,1-Dichloroethane	daily maximum	≤ .059 mg/L	all year	003
1,1-Dichloroethylene	daily average	≤ .011 mg/L	all year	003
1,1-Dichloroethylene	daily maximum	≤ .023 mg/L	all year	003
1,1,1-Trichloroethane	daily average	≤ .022 mg/L	all year	003
1,1,1-Trichloroethane	daily maximum	≤ .059 mg/L	all year	003
1,1,2-Trichloroethane	daily average	≤ .032 mg/L	all year	003
1,1,2-Trichloroethane	daily maximum	≤ .127 mg/L	all year	003
Benzo[a]anthracene	daily average	≤ .0015 mg/L	all year	003
Benzo[a]anthracene	daily maximum	≤ .0031 mg/L	all year	003
1,2-Dichlorobenzene	daily average	≤ .196 mg/L	all year	003
1,2-Dichlorobenzene	daily maximum	≤ .794 mg/L	all year	003
1,2-Dichloropropane	daily average	≤ .196 mg/L	all year	003
1,2-Dichloropropane	daily maximum	≤ .794 mg/L	all year	003
trans-1,2-Dichloroethylene	daily average	≤ .025 mg/L	all year	003
trans-1,2-Dichloroethylene	daily maximum	≤ .066 mg/L	all year	003
1,2,4-Trichlorobenzene	daily average	≤ .196 mg/L	all year	003
1,2,4-Trichlorobenzene	daily maximum	≤ .794 mg/L	all year	003
1,3-Dichlorobenzene	daily average	≤ .142 mg/L	all year	003
1,3-Dichlorobenzene	daily maximum	≤ .38 mg/L	all year	003
1,4-Dichlorobenzene	daily average	≤ .142 mg/L	all year	003
1,4-Dichlorobenzene	daily maximum	≤ .38 mg/L	all year	003
2-Nitrophenol	daily average	≤ .065 mg/L	all year	003
2-Nitrophenol	daily maximum	≤ .231 mg/L	all year	003
2,4-Dimethylphenol	daily average	≤ .019 mg/L	all year	003
2,4-Dimethylphenol	daily maximum	≤ .047 mg/L	all year	003
2,4-Dinitrophenol	daily average	≤ 1.207 mg/L	all year	003
2,4-Dinitrophenol	daily maximum	≤ 4.291 mg/L	all year	003
4-Nitrophenol	daily average	≤ .162 mg/L	all year	003
4-Nitrophenol	daily maximum	≤ .576 mg/L	all year	003
4,6-Dinitro-o-cresol	daily average	≤ .078 mg/L	all year	003
4,6-Dinitro-o-cresol	daily maximum	≤ .277 mg/L	all year	003
Phenol	daily average	≤ .019 mg/L	all year	003
Phenol	daily maximum	≤ .047 mg/L	all year	003
Naphthalene	daily average	≤ .019 mg/L	all year	003
Naphthalene	daily maximum	≤ .047 mg/L	all year	003
Di[2-ethylhexyl] phthalate [DEHP]	daily average	≤ .095 mg/L	all year	003
Di[2-ethylhexyl] phthalate [DEHP]	daily maximum	≤ .258 mg/L	all year	003
Di-n-butyl phthalate	daily average	≤ .02 mg/L	all year	003
Di-n-butyl phthalate	daily maximum	≤ .043 mg/L	all year	003
Vinyl chloride	daily average	≤ .064 mg/L	all year	003
Vinyl chloride	daily maximum	≤ .136 mg/L	all year	003
Trichloroethylene	daily average	≤ .026 mg/L	all year	003
Trichloroethylene	daily maximum	≤ .069 mg/L	all year	003
Hexachlorobenzene	daily average	≤ .000012 mg/L	all year	003
Hexachlorobenzene	daily maximum	≤ .000025 mg/L	all year	003
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	003
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	003
1,3-Dichloropropylene	daily average	≤ .196 mg/L	all year	003
1,3-Dichloropropylene	daily maximum	≤ .794 mg/L	all year	003
Xylene [mix of m+o+p]	daily maximum	≤ 1 mg/L	all year	003
Discharge event observation [Visual Monitoring]	monthly total	report only (occur/mo)	all year	003
Chloroethane	daily average	≤ .11 mg/L	all year	003
Chloroethane	daily maximum	≤ .295 mg/L	all year	003
BOD, 5-day, 20 deg. C	daily average	≤ 30 mg/L	all year	007
BOD, 5-day, 20 deg. C	daily maximum	≤ 80 mg/L	all year	007
pH	minimum	≥ 6 SU	all year	007
pH	minimum	≥ 6 SU	all year	007
pH	maximum	≤ 9 SU	all year	007
pH	maximum	≤ 9 SU	all year	007
Solids, total suspended	daily average	≤ 127 mg/L	all year	007
Solids, total suspended	daily maximum	≤ 283 mg/L	all year	007
Oil & Grease	daily maximum	≤ 15 mg/L	all year	007
Oil & Grease	daily maximum	≤ 15 mg/L	all year	007
Carbon, tot organic [TOC]	daily maximum	≤ 55 mg/L	all year	007
Carbon, tot organic [TOC]	daily maximum	≤ 55 mg/L	all year	007
Carbon tetrachloride	daily average	≤ .142 mg/L	all year	007
Carbon tetrachloride	daily maximum	≤ .38 mg/L	all year	007
1,2-Dichloroethane	daily average	≤ .18 mg/L	all year	007
1,2-Dichloroethane	daily maximum	≤ .574 mg/L	all year	007
Chloroform	daily average	≤ .111 mg/L	all year	007
Chloroform	daily maximum	≤ .325 mg/L	all year	007
Toluene	daily average	≤ .028 mg/L	all year	007
Toluene	daily maximum	≤ .074 mg/L	all year	007
Benzene	daily average	≤ .057 mg/L	all year	007
Benzene	daily maximum	≤ .134 mg/L	all year	007
Acenaphthylene	daily average	≤ .019 mg/L	all year	007
Acenaphthylene	daily maximum	≤ .047 mg/L	all year	007
Acenaphthene	daily average	≤ .019 mg/L	all year	007
Acenaphthene	daily maximum	≤ .047 mg/L	all year	007
Acrylonitrile	daily average	≤ .094 mg/L	all year	007
Acrylonitrile	daily maximum	≤ .232 mg/L	all year	007
Anthracene	daily average	≤ .019 mg/L	all year	007
Anthracene	daily maximum	≤ .047 mg/L	all year	007
Benzo[k]fluoranthene	daily average	≤ .019 mg/L	all year	007
Benzo[k]fluoranthene	daily maximum	≤ .047 mg/L	all year	007
Benzo[a]pyrene	daily average	≤ .02 mg/L	all year	007
Benzo[a]pyrene	daily maximum	≤ .048 mg/L	all year	007
Chlorobenzene	daily average	≤ .142 mg/L	all year	007
Chlorobenzene	daily maximum	≤ .38 mg/L	all year	007
Chrysene	daily average	≤ .019 mg/L	all year	007
Chrysene	daily maximum	≤ .047 mg/L	all year	007
Diethyl phthalate	daily average	≤ .046 mg/L	all year	007
Diethyl phthalate	daily maximum	≤ .113 mg/L	all year	007
Dimethyl phthalate	daily average	≤ .019 mg/L	all year	007
Dimethyl phthalate	daily maximum	≤ .047 mg/L	all year	007
Ethylbenzene	daily average	≤ .142 mg/L	all year	007
Ethylbenzene	daily maximum	≤ .38 mg/L	all year	007
Fluoranthene	daily average	≤ .022 mg/L	all year	007
Fluoranthene	daily maximum	≤ .054 mg/L	all year	007
Fluorene	daily average	≤ .019 mg/L	all year	007
Fluorene	daily maximum	≤ .047 mg/L	all year	007
Hexachlorobutadiene	daily average	≤ .142 mg/L	all year	007
Hexachlorobutadiene	daily maximum	≤ .38 mg/L	all year	007
Hexachloroethane	daily average	≤ .196 mg/L	all year	007
Hexachloroethane	daily maximum	≤ .794 mg/L	all year	007
Methyl chloride [Chloromethane]	daily average	≤ .11 mg/L	all year	007
Methyl chloride [Chloromethane]	daily maximum	≤ .295 mg/L	all year	007
Methylene chloride	daily average	≤ .036 mg/L	all year	007
Methylene chloride	daily maximum	≤ .17 mg/L	all year	007
Nitrobenzene	daily average	≤ 2.237 mg/L	all year	007
Nitrobenzene	daily maximum	≤ 6.402 mg/L	all year	007
Phenanthrene	daily average	≤ .019 mg/L	all year	007
Phenanthrene	daily maximum	≤ .047 mg/L	all year	007
Pyrene	daily average	≤ .02 mg/L	all year	007
Pyrene	daily maximum	≤ .048 mg/L	all year	007
Tetrachloroethylene	daily average	≤ .052 mg/L	all year	007
Tetrachloroethylene	daily maximum	≤ .164 mg/L	all year	007
1,1-Dichloroethane	daily average	≤ .022 mg/L	all year	007
1,1-Dichloroethane	daily maximum	≤ .059 mg/L	all year	007
1,1-Dichloroethylene	daily average	≤ .022 mg/L	all year	007
1,1-Dichloroethylene	daily maximum	≤ .06 mg/L	all year	007
1,1,1-Trichloroethane	daily average	≤ .022 mg/L	all year	007
1,1,1-Trichloroethane	daily maximum	≤ .059 mg/L	all year	007
1,1,2-Trichloroethane	daily average	≤ .032 mg/L	all year	007
1,1,2-Trichloroethane	daily maximum	≤ .127 mg/L	all year	007
Benzo[a]anthracene	daily average	≤ .019 mg/L	all year	007
Benzo[a]anthracene	daily maximum	≤ .047 mg/L	all year	007
1,2-Dichlorobenzene	daily average	≤ .196 mg/L	all year	007
1,2-Dichlorobenzene	daily maximum	≤ .794 mg/L	all year	007
1,2-Dichloropropane	daily average	≤ .196 mg/L	all year	007
1,2-Dichloropropane	daily maximum	≤ .794 mg/L	all year	007
trans-1,2-Dichloroethylene	daily average	≤ .025 mg/L	all year	007
trans-1,2-Dichloroethylene	daily maximum	≤ .066 mg/L	all year	007
1,2,4-Trichlorobenzene	daily average	≤ .196 mg/L	all year	007
1,2,4-Trichlorobenzene	daily maximum	≤ .794 mg/L	all year	007
1,3-Dichlorobenzene	daily average	≤ .142 mg/L	all year	007
1,3-Dichlorobenzene	daily maximum	≤ .38 mg/L	all year	007
1,4-Dichlorobenzene	daily average	≤ .142 mg/L	all year	007
1,4-Dichlorobenzene	daily maximum	≤ .38 mg/L	all year	007
2-Nitrophenol	daily average	≤ .065 mg/L	all year	007
2-Nitrophenol	daily maximum	≤ .231 mg/L	all year	007
2,4-Dimethylphenol	daily average	≤ .019 mg/L	all year	007
2,4-Dimethylphenol	daily maximum	≤ .047 mg/L	all year	007
2,4-Dinitrophenol	daily average	≤ 1.207 mg/L	all year	007
2,4-Dinitrophenol	daily maximum	≤ 4.291 mg/L	all year	007
4-Nitrophenol	daily average	≤ .162 mg/L	all year	007
4-Nitrophenol	daily maximum	≤ .576 mg/L	all year	007
4,6-Dinitro-o-cresol	daily average	≤ .078 mg/L	all year	007
4,6-Dinitro-o-cresol	daily maximum	≤ .277 mg/L	all year	007
Phenol	daily average	≤ .019 mg/L	all year	007
Phenol	daily maximum	≤ .047 mg/L	all year	007
Naphthalene	daily average	≤ .019 mg/L	all year	007
Naphthalene	daily maximum	≤ .047 mg/L	all year	007
Di[2-ethylhexyl] phthalate [DEHP]	daily average	≤ .095 mg/L	all year	007
Di[2-ethylhexyl] phthalate [DEHP]	daily maximum	≤ .258 mg/L	all year	007
Di-n-butyl phthalate	daily average	≤ .02 mg/L	all year	007
Di-n-butyl phthalate	daily maximum	≤ .043 mg/L	all year	007
Vinyl chloride	daily average	≤ .097 mg/L	all year	007
Vinyl chloride	daily maximum	≤ .172 mg/L	all year	007
Trichloroethylene	daily average	≤ .026 mg/L	all year	007
Trichloroethylene	daily maximum	≤ .069 mg/L	all year	007
Hexachlorobenzene	daily average	≤ .196 mg/L	all year	007
Hexachlorobenzene	daily maximum	≤ .794 mg/L	all year	007
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	007
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	007
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	007
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	007
1,3-Dichloropropylene	daily average	≤ .196 mg/L	all year	007
1,3-Dichloropropylene	daily maximum	≤ .794 mg/L	all year	007
3,4-Benzofluoranthene	daily average	≤ .02 mg/L	all year	007
3,4-Benzofluoranthene	daily maximum	≤ .048 mg/L	all year	007
Xylene [mix of m+o+p]	daily maximum	≤ 1 mg/L	all year	007
Discharge event observation [Visual Monitoring]	monthly total	report only (occur/mo)	all year	007
Chloroethane	daily average	≤ .11 mg/L	all year	007
Chloroethane	daily maximum	≤ .295 mg/L	all year	007

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/TX0007013 · MCP: https://passage-data.com/mcp