CHEMOURS COMPANY FC LLC, THE DELISLE PLANT

NPDES permit MS0027294 · Major NON-POTW · administratively continued, expires 2024-09-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2024-09-30 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 24 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (31)

OutfallParameterStatisticLimitMonths
001Tide stageDAILY MN >= 12 in all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 60 mg/L all year
001Solids, total suspendedMO AVG <= 943.3 lb/d all year
001Solids, total suspendedDAILY MX <= 1886.5 lb/d all year
001Nickel, total recoverableMO AVG <= .212 mg/L all year
001Nickel, total recoverableDAILY MX <= .423 mg/L all year
001Nickel, total recoverableMO AVG <= 6.7 lb/d all year
001Nickel, total recoverableDAILY MX <= 13.3 lb/d all year
001Chromium, total recoverableMO AVG <= 1.276 mg/L all year
001Chromium, total recoverableDAILY MX <= 2.551 mg/L all year
001Chromium, total recoverableMO AVG <= 40.1 lb/d all year
001Chromium, total recoverableDAILY MX <= 80.2 lb/d all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Temperature, summer [deg. F]MO AVG report only May, Jun, Jul, Aug, Sep, Oct
001Temperature, summer [deg. F]DAILY MX <= 100 deg F May, Jun, Jul, Aug, Sep, Oct
001Temperature, winter [deg. F]MO AVG report only Jan, Feb, Mar, Apr, Nov, Dec
001Temperature, winter [deg. F]DAILY MX <= 95 deg F Jan, Feb, Mar, Apr, Nov, Dec
001pH range excursions, > 60 minutesDAILY MX <= 0 occur/mo all year
001pH range excursions, monthly total accumMAXIMUM <= 446 min all year
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 60 mg/L all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, 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