EXXON MOBIL CORPORATION

NPDES permit TX0077887 · Minor NON-POTW · administratively continued, expires 2024-10-21 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2024-10-21 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 41 forms filed late

Last period with anything received: 2026-07-31.

Reporting

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).

Limits in force (118)

OutfallParameterStatisticLimitMonths
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Carbon, tot organic [TOC]DAILY MX <= 55 mg/L all year
002Flow, in conduit or thru treatment plantDAILY AV report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
102BOD, 5-day, 20 deg. CDAILY MX <= 80 mg/L all year
102Solids, total suspendedDAILY MX <= 149 mg/L all year
102Carbon tetrachlorideDAILY MX <= .38 mg/L all year
102ChloroformDAILY MX <= .325 mg/L all year
102TolueneDAILY MX <= .074 mg/L all year
102BenzeneDAILY MX <= .134 mg/L all year
102AcenaphthyleneDAILY MX <= .047 mg/L all year
102AcenaphtheneDAILY MX <= .047 mg/L all year
102AcrylonitrileDAILY MX <= .232 mg/L all year
102AnthraceneDAILY MX <= .047 mg/L all year
102Benzo[k]fluorantheneDAILY MX <= .047 mg/L all year
102Benzo[a]pyreneDAILY MX <= .048 mg/L all year
102ChlorobenzeneDAILY MX <= .38 mg/L all year
102ChryseneDAILY MX <= .047 mg/L all year
102Diethyl phthalateDAILY MX <= .113 mg/L all year
102Dimethyl phthalateDAILY MX <= .047 mg/L all year
102EthylbenzeneDAILY MX <= .38 mg/L all year
102FluorantheneDAILY MX <= .054 mg/L all year
102FluoreneDAILY MX <= .047 mg/L all year
102HexachlorobutadieneDAILY MX <= .38 mg/L all year
102HexachloroethaneDAILY MX <= .794 mg/L all year
102Methyl chloride [Chloromethane]DAILY MX <= .295 mg/L all year
102Methylene chlorideDAILY MX <= .17 mg/L all year
102NitrobenzeneDAILY MX <= 6.402 mg/L all year
102PhenanthreneDAILY MX <= .047 mg/L all year
102PyreneDAILY MX <= .048 mg/L all year
102TetrachloroethyleneDAILY MX <= .164 mg/L all year
1021,1-DichloroethaneDAILY MX <= .059 mg/L all year
1021,1-DichloroethyleneDAILY MX <= .06 mg/L all year
1021,1,1-TrichloroethaneDAILY MX <= .059 mg/L all year
1021,1,2-TrichloroethaneDAILY MX <= .127 mg/L all year
102Benzo[a]anthraceneDAILY MX <= .047 mg/L all year
1021,2-Dichloroethane, total weightDAILY MX <= .574 mg/L all year
1021,2-DichlorobenzeneDAILY MX <= .794 mg/L all year
1021,2-DichloropropaneDAILY MX <= .794 mg/L all year
102trans-1,2-DichloroethyleneDAILY MX <= .066 mg/L all year
1021,2,4-TrichlorobenzeneDAILY MX <= .794 mg/L all year
1021,3-DichlorobenzeneDAILY MX <= .38 mg/L all year
1021,4-DichlorobenzeneDAILY MX <= .38 mg/L all year
1022-NitrophenolDAILY MX <= .231 mg/L all year
1022,4-DimethylphenolDAILY MX <= .047 mg/L all year
1022,4-DinitrophenolDAILY MX <= 4.291 mg/L all year
1024-NitrophenolDAILY MX <= .576 mg/L all year
1024,6-Dinitro-o-cresolDAILY MX <= .277 mg/L all year
102PhenolDAILY MX <= .047 mg/L all year
102NaphthaleneDAILY MX <= .047 mg/L all year
102Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .258 mg/L all year
102Di-n-butyl phthalateDAILY MX <= .043 mg/L all year
102Vinyl chlorideDAILY MX <= .172 mg/L all year
102TrichloroethyleneDAILY MX <= .069 mg/L all year
102HexachlorobenzeneDAILY MX <= .794 mg/L all year
102Flow, in conduit or thru treatment plantDAILY AV <= .001 MGD all year
102Flow, in conduit or thru treatment plantDAILY MX <= .002 MGD all year
1021,3-DichloropropyleneDAILY MX <= .794 mg/L all year
1023,4-BenzofluorantheneDAILY MX <= .048 mg/L all year
102ChloroethaneDAILY MX <= .295 mg/L all year
202BOD, 5-day, 20 deg. CDAILY MX <= 80 mg/L all year
202Solids, total suspendedDAILY MX <= 149 mg/L all year
202Carbon tetrachlorideDAILY MX <= .38 mg/L all year
202ChloroformDAILY MX <= .325 mg/L all year
202TolueneDAILY MX <= .074 mg/L all year
202BenzeneDAILY MX <= .134 mg/L all year
202AcenaphthyleneDAILY MX <= .047 mg/L all year
202AcenaphtheneDAILY MX <= .047 mg/L all year
202AcrylonitrileDAILY MX <= .232 mg/L all year
202AnthraceneDAILY MX <= .047 mg/L all year
202Benzo[k]fluorantheneDAILY MX <= .047 mg/L all year
202Benzo[a]pyreneDAILY MX <= .048 mg/L all year
202ChlorobenzeneDAILY MX <= .38 mg/L all year
202ChryseneDAILY MX <= .047 mg/L all year
202Diethyl phthalateDAILY MX <= .113 mg/L all year
202Dimethyl phthalateDAILY MX <= .047 mg/L all year
202EthylbenzeneDAILY MX <= .38 mg/L all year
202FluorantheneDAILY MX <= .054 mg/L all year
202FluoreneDAILY MX <= .047 mg/L all year
202HexachlorobutadieneDAILY MX <= .38 mg/L all year
202HexachloroethaneDAILY MX <= .794 mg/L all year
202Methyl chloride [Chloromethane]DAILY MX <= .295 mg/L all year
202Methylene chlorideDAILY MX <= .17 mg/L all year
202NitrobenzeneDAILY MX <= 6.402 mg/L all year
202PhenanthreneDAILY MX <= .047 mg/L all year
202PyreneDAILY MX <= .048 mg/L all year
202TetrachloroethyleneDAILY MX <= .164 mg/L all year
2021,1-DichloroethaneDAILY MX <= .059 mg/L all year
2021,1-DichloroethyleneDAILY MX <= .06 mg/L all year
2021,1,1-TrichloroethaneDAILY MX <= .059 mg/L all year
2021,1,2-TrichloroethaneDAILY MX <= .127 mg/L all year
202Benzo[a]anthraceneDAILY MX <= .047 mg/L all year
2021,2-Dichloroethane, total weightDAILY MX <= .574 mg/L all year
2021,2-DichlorobenzeneDAILY MX <= .794 mg/L all year
2021,2-DichloropropaneDAILY MX <= .794 mg/L all year
202trans-1,2-DichloroethyleneDAILY MX <= .066 mg/L all year
2021,2,4-TrichlorobenzeneDAILY MX <= .794 mg/L all year
2021,3-DichlorobenzeneDAILY MX <= .38 mg/L all year
2021,4-DichlorobenzeneDAILY MX <= .38 mg/L all year
2022-NitrophenolDAILY MX <= .231 mg/L all year
2022,4-DimethylphenolDAILY MX <= .047 mg/L all year
2022,4-DinitrophenolDAILY MX <= 4.291 mg/L all year
2024-NitrophenolDAILY MX <= .576 mg/L all year
2024,6-Dinitro-o-cresolDAILY MX <= .277 mg/L all year
202PhenolDAILY MX <= .047 mg/L all year
202NaphthaleneDAILY MX <= .047 mg/L all year
202Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .258 mg/L all year
202Di-n-butyl phthalateDAILY MX <= .043 mg/L all year
202Vinyl chlorideDAILY MX <= .172 mg/L all year
202TrichloroethyleneDAILY MX <= .069 mg/L all year
202HexachlorobenzeneDAILY MX <= .794 mg/L all year
202Flow, in conduit or thru treatment plantDAILY AV <= .001 MGD all year
202Flow, in conduit or thru treatment plantDAILY MX <= .002 MGD all year
2021,3-DichloropropyleneDAILY MX <= .794 mg/L all year
2023,4-BenzofluorantheneDAILY MX <= .048 mg/L all year
202ChloroethaneDAILY MX <= .295 mg/L 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