South Carolina Public Service Authority - Santee Cooper

NPDES permit SC0048135 · Major NON-POTW · administratively continued, expires 2026-02-28 · 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 2026-02-28 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

1values over a limit
0required values missing, on 0 form(s)
0of 57 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (1).

Reporting

Reports are due about 29 days after each monitoring period ends (the most common figure among SC permits in EPA's filings — check your permit).

Limits in force (44)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX <= 121.2 deg F all year
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 25.3 mg/L all year
001Solids, total suspendedDAILY MX <= 71.7 mg/L all year
001Oil & GreaseMO AVG <= 10.3 mg/L all year
001Oil & GreaseDAILY MX <= 15.3 mg/L all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only 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
01AChromium, total [as Cr]MO AVG <= .2 mg/L all year
01AChromium, total [as Cr]DAILY MX <= .2 mg/L all year
01AZinc, total [as Zn]MO AVG <= 1 mg/L all year
01AZinc, total [as Zn]DAILY MX <= 1 mg/L all year
01APriority PollutantsMO AVG <= 0 mg/L all year
01APriority PollutantsDAILY MX <= 0 mg/L all year
01AFlow, in conduit or thru treatment plantMO AVG report only all year
01AFlow, in conduit or thru treatment plantDAILY MX report only all year
01AChlorine, free availableMO AVG <= .2 mg/L all year
01AChlorine, free availableDAILY MX <= .5 mg/L all year
01BCopper, total [as Cu]MO AVG <= 1 mg/L all year
01BCopper, total [as Cu]DAILY MX <= 1 mg/L all year
01BIron, total [as Fe]MO AVG <= 1 mg/L all year
01BIron, total [as Fe]DAILY MX <= 1 mg/L all year
01BFlow, in conduit or thru treatment plantMO AVG report only all year
01BFlow, in conduit or thru treatment plantDAILY MX report only all year
01CChromium, total [as Cr]MO AVG <= .2 mg/L all year
01CChromium, total [as Cr]DAILY MX <= .2 mg/L all year
01CZinc, total [as Zn]MO AVG <= 1 mg/L all year
01CZinc, total [as Zn]DAILY MX <= 1 mg/L all year
01CPriority PollutantsMO AVG <= 0 mg/L all year
01CPriority PollutantsDAILY MX <= 0 mg/L all year
01CFlow, in conduit or thru treatment plantMO AVG report only all year
01CFlow, in conduit or thru treatment plantDAILY MX report only all year
01CChlorine, free availableMO AVG <= .2 mg/L all year
01CChlorine, free availableDAILY MX <= .5 mg/L all year
01DCopper, total [as Cu]MO AVG <= 1 mg/L all year
01DCopper, total [as Cu]DAILY MX <= 1 mg/L all year
01DIron, total [as Fe]MO AVG <= 1 mg/L all year
01DIron, total [as Fe]DAILY MX <= 1 mg/L all year
01DFlow, in conduit or thru treatment plantMO AVG report only all year
01DFlow, 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