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INEOS US Chemicals Company

Industrial Organic Chemicals, major discharger, Wando, South Carolina. NPDES permit SC0028584 expired Aug 31, 2024; its limits still apply. Last 12 months: over a limit once (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 30 days after each period: form 1 monthly (26 values), form 2 yearly, form 3 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 7 required values missing, 2 of 14 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
August 2026Oxygen demand, ultimate, daily maximum10274.5≤ 9472 lb/d8%

Limits in force (38)

ParameterStatisticLimitMonths
Oxygen demand, ultimatemonthly average≤ 5429 lb/dJan, Feb, Nov, Dec
Oxygen demand, ultimatemonthly average≤ 4736 lb/dMar–Oct
Oxygen demand, ultimatedaily maximum≤ 10858 lb/dJan, Feb, Nov, Dec
Oxygen demand, ultimatedaily maximum≤ 9472 lb/dMar–Oct
Oxygen, dissolved [DO]instantaneous minimum≥ 1 mg/Lall year
Oxygen, dissolved [DO]monthly average minimum≥ 4 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 823 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 2000 lb/dall year
pHinstantaneous minimumreport only (SU)all year
pHinstantaneous maximumreport only (SU)all year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendedmonthly average≤ 1060 lb/dall year
Solids, total suspendeddaily maximum≤ 2392 lb/dall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)all year
Chloroformmonthly average≤ .021 mg/Lall year
Chloroformdaily maximum≤ .046 mg/Lall year
Chloroformmonthly average≤ .557 lb/dall year
Chloroformdaily maximum≤ 1.221 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Enterococci30-day geometric mean≤ 35 CFU/100mLall year
Enterococcidaily maximum≤ 501 CFU/100mLall year
Mercury, total [as Hg]monthly averagereport only (ng/L)all year
Mercury, total [as Hg]daily maximumreport only (ng/L)all year
Length of longest pH excursioninstantaneous maximum≤ 60 minall year
% of time exceeding pH limitsinstantaneous maximum≤ 1 %all year
Flow, process wastewatermonthly averagereport only (MGD)all year
Flow, process wastewaterdaily maximumreport only (MGD)all year
LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)daily maximumreport only (%)all year
% Effect Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly averagereport only (%)all year
% Effect Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)daily maximumreport only (%)all year
IC25 Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)daily maximumreport only (%)all year

How strict are these limits?

Cited limits by parameter: South Carolina's rules and the federal ones.

Same industry: the 24 Chemicals and Allied Products permits in South Carolina.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/SC0028584 · MCP: https://passage-data.com/mcp