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South Carolina Ports Authority

Paperboard Mills, major discharger, N Charleston, South Carolina. NPDES permit SC0001759 expired Mar 31, 2026; its limits still apply. Last 12 months: over a limit 4 times (last June 2026), 3 of 34 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: outfall 001 form 1 twice a year (1 value), outfall 001 form T1 monthly (17 values), outfall 001 form T2 monthly (17 values), outfall 004 form 1 monthly (6 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 38 reports late

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

Period endingOutfallParameterReportedLimitOver by
October 2025001pH, instantaneous maximum9.36≤ 9 SU—
October 2025001pH, instantaneous maximum9.36≤ 9 SU—
May 2026004Solids, total suspended, daily maximum54≤ 40 mg/L35%
June 2026004Solids, total suspended, daily maximum51≤ 40 mg/L28%

Limits in force (45)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximum≤ 105 deg Fall year001
Temperature, water deg. fahrenheitdaily maximum≤ 105 deg Fall year001
Oxygen demand, ultimatemonthly average≤ 129450 lb/dJan, Feb, Nov, Dec001
Oxygen demand, ultimatemonthly average≤ 40959 lb/dMar–Oct001
Oxygen demand, ultimatemonthly average≤ 96764 lb/dJan, Feb, Nov, Dec001
Oxygen demand, ultimatemonthly average≤ 40959 lb/dMar–Oct001
Oxygen demand, ultimatedaily maximum≤ 258900 lb/dJan, Feb, Nov, Dec001
Oxygen demand, ultimatedaily maximum≤ 81918 lb/dMar–Oct001
Oxygen demand, ultimatedaily maximum≤ 193528 lb/dJan, Feb, Nov, Dec001
Oxygen demand, ultimatedaily maximum≤ 81918 lb/dMar–Oct001
Oxygen, dissolved [DO]daily minimum≥ 1 mg/Lall year001
Oxygen, dissolved [DO]daily minimum≥ 1 mg/Lall year001
Oxygen, dissolved [DO]monthly average minimum≥ 4 mg/Lall year001
Oxygen, dissolved [DO]monthly average minimum≥ 4 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 10898 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 14655 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 21795 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 29310 lb/dall year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedmonthly average≤ 33396 lb/dall year001
Solids, total suspendedmonthly average≤ 23352 lb/dall year001
Solids, total suspendeddaily maximum≤ 66792 lb/dall year001
Solids, total suspendeddaily maximum≤ 46704 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Pass/Fail Static 48Hr Acute Ceriodaphnia dubiadaily maximum≤ 0 pass=0;fail=1all year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 20 mg/Lall year004
pHinstantaneous minimum≥ 6 SUall year004
pHinstantaneous maximum≤ 8.5 SUall year004
Solids, total suspendeddaily maximum≤ 40 mg/Lall year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004

How strict are these limits?

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

Same industry: the 9 Paper and Allied Products permits in South Carolina.

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Your permit document is the final word. As JSON: /api/v1/permits/SC0001759 · MCP: https://passage-data.com/mcp