EXXONMOBIL OIL CORPORATION

NPDES permit TX0118737 · Major NON-POTW · administratively continued, expires 2024-10-16 · 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 2024-10-16 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 38 forms filed late

Last period with anything received: 2026-08-31.

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 (28)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CDAILY MX <= 48 mg/L all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 360 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedDAILY MX report only all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Sulfide, total [as S]DAILY MX report only all year
001Chromium, hexavalent [as Cr]DAILY MX <= .06 mg/L all year
001Chromium, total [as Cr]DAILY MX <= .6 mg/L all year
001BenzeneDAILY MX <= .45 mg/L all year
001Flow, in conduit or thru treatment plantDAILY AV report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Phenolic compounds, totalDAILY MX <= .4 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Flow, in conduit or thru treatment plantDAILY AV <= 3 MGD all year
002Flow, in conduit or thru treatment plantDAILY MX <= 4 MGD all year
003Oxygen demand, chem. [high level] [COD]DAILY MX <= 150 mg/L all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Oil & GreaseDAILY MX <= 15 mg/L all year
003Flow, in conduit or thru treatment plantDAILY AV report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
TX1Whole effluent toxicity - retest #1SINGSAMP report only all year
TX1Whole effluent toxicity - retest #2SINGSAMP report only all year
TX1LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)SINGSAMP report only all year
TX1LC50 Pass/Fail Static 24Hr Acute Menidia menidiaSINGSAMP report only 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