MPM SILICONES LLC

NPDES permit TX0108367 · Minor NON-POTW · administratively continued, expires 2025-07-14 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2025-07-14 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 22 forms filed late

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

Reporting

Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (24)

OutfallParameterStatisticLimitMonths
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
001Copper, total [as Cu]DAILY AV report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Aluminum, total [as Al]DAILY AV report only all year
001Aluminum, total [as Al]DAILY MX report only 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
201BOD, 5-day, 20 deg. CDAILY AV <= 10 mg/L all year
201BOD, 5-day, 20 deg. CDAILY MX <= 25 mg/L all year
201pHMINIMUM >= 6 SU all year
201pHMAXIMUM <= 9 SU all year
201Oil & GreaseDAILY AV report only all year
201Oil & GreaseDAILY MX <= 15 mg/L all year
201Nitrogen, ammonia total [as N]DAILY AV <= 3 mg/L all year
201Nitrogen, ammonia total [as N]DAILY MX <= 6 mg/L all year
201Copper, total [as Cu]DAILY AV <= .029 mg/L all year
201Copper, total [as Cu]DAILY MX <= .061 mg/L all year
201Zinc, total [as Zn]DAILY AV <= .26 mg/L all year
201Zinc, total [as Zn]DAILY MX <= .55 mg/L all year
201Aluminum, total [as Al]DAILY AV <= .835 mg/L all year
201Aluminum, total [as Al]DAILY MX <= 1.766 mg/L all year
201Flow, in conduit or thru treatment plantDAILY AV <= .02 MGD all year
201Flow, in conduit or thru treatment plantDAILY MX <= .03 MGD 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