EXXONMOBIL OIL CORPORATION

NPDES permit TX0004227 · Minor NON-POTW · administratively continued, expires 2026-08-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2026-08-30 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 14 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 (10)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Carbon, tot organic [TOC]DAILY MX <= 55 mg/L all year
001Zinc, total [as Zn]DAILY MX <= 1.441 mg/L all year
001TolueneDAILY MX <= .02 mg/L all year
001BenzeneDAILY MX <= .02 mg/L all year
001PhenolsDAILY MX <= .1 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

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