INEOS US Chemicals Company

NPDES permit SC0028584 · Major NON-POTW · administratively continued, expires 2024-08-31 · 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 2024-08-31 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 11 forms filed late

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

Reporting

Reports are due about 30 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (38)

OutfallParameterStatisticLimitMonths
001Oxygen demand, ultimateMO AVG <= 5429 lb/d Jan, Feb, Nov, Dec
001Oxygen demand, ultimateMO AVG <= 4736 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Oxygen demand, ultimateDAILY MX <= 10858 lb/d Jan, Feb, Nov, Dec
001Oxygen demand, ultimateDAILY MX <= 9472 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Oxygen, dissolved [DO]INST MIN >= 1 mg/L all year
001Oxygen, dissolved [DO]MO AV MN >= 4 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 823 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 2000 lb/d all year
001pHINST MIN report only all year
001pHINST MAX report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspendedMO AVG <= 1060 lb/d all year
001Solids, total suspendedDAILY MX <= 2392 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001ChloroformMO AVG <= .021 mg/L all year
001ChloroformDAILY MX <= .046 mg/L all year
001ChloroformMO AVG <= .557 lb/d all year
001ChloroformDAILY MX <= 1.221 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
001Enterococci30DAVGEO <= 35 CFU/100mL all year
001EnterococciDAILY MX <= 501 CFU/100mL all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Length of longest pH excursionINST MAX <= 60 min all year
001% of time exceeding pH limitsINST MAX <= 1 % all year
001Flow, process wastewaterMO AVG report only all year
001Flow, process wastewaterDAILY MX report only all year
001LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)DAILY MX report only all year
001% Effect Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AVG report only all year
001% Effect Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)DAILY MX report only all year
001IC25 Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)DAILY 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