South Carolina Public Service Authority (Santee Cooper)

NPDES permit SC0022471 · Major NON-POTW · effective, expires 2030-06-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 92 forms filed late

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

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 (80)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitINST MAX <= 93 deg F all year
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX <= 5 deg F all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 8.5 SU all year
001Solids, total suspendedMO AVG <= 29.4 mg/L all year
001Solids, total suspendedDAILY MX <= 95.4 mg/L all year
001Oil & GreaseMO AVG <= 8 mg/L all year
001Oil & GreaseDAILY MX <= 11 mg/L all year
001Arsenic, total [as As]MO AVG <= 42.1 ug/L all year
001Arsenic, total [as As]DAILY MX <= 80.7 ug/L all year
001Copper, total [as Cu]MO AVG <= 4.3 ug/L all year
001Copper, total [as Cu]DAILY MX <= 6.8 ug/L all year
001Thallium, total [as Tl]MO AVG report only all year
001Thallium, total [as Tl]DAILY MX report only all year
001Nickel, total [as Ni]MO AVG <= 9.7 ug/L all year
001Nickel, total [as Ni]DAILY MX <= 87.7 ug/L all year
001Selenium, total [as Se]MO AVG <= 5.8 ug/L all year
001Selenium, total [as Se]DAILY MX <= 23.4 ug/L 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
001Chlorine, total residualMO AVG <= 8.8 ug/L all year
001Chlorine, total residualDAILY MX <= 15.2 ug/L all year
001Number of EventsDAILY MX report only all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Duration of dischargeDAILY MX report only all year
001LC50 Static 48Hr Acute Ceriodaphnia dubiaDAILY MN report only all year
001Pass/Fail Static 48Hr Acute Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
002Temperature, water deg. fahrenheitMO AVG report only Mar, Apr, May, Sep, Oct, Nov
002Temperature, water deg. fahrenheitMO AVG report only Jun, Jul, Aug
002Temperature, water deg. fahrenheitMO AVG report only Jan, Feb, Dec
002Temperature, water deg. fahrenheitINST MAX <= 97 deg F Mar, Apr, May, Sep, Oct, Nov
002Temperature, water deg. fahrenheitINST MAX <= 105 deg F Jun, Jul, Aug
002Temperature, water deg. fahrenheitINST MAX <= 86 deg F Jan, Feb, Dec
002Temperature, water deg. fahrenheitMO AVG report only all year
002Temperature, water deg. fahrenheitINST MAX report only all year
002pHINST MIN >= 6 SU all year
002pHINST MAX <= 9 SU all year
002Solids, total suspendedMO AVG <= 29.4 mg/L all year
002Solids, total suspendedDAILY MX <= 95.4 mg/L all year
002Oil & GreaseMO AVG <= 8 mg/L all year
002Oil & GreaseDAILY MX <= 11 mg/L all year
002Arsenic, total [as As]MO AVG report only all year
002Arsenic, total [as As]DAILY MX report only all year
002Selenium, total [as Se]MO AVG report only all year
002Selenium, total [as Se]DAILY 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
002Chlorine, total residualMO AVG report only all year
002Chlorine, total residualDAILY MX report only all year
002Mercury, total [as Hg]MO AVG report only all year
002Mercury, total [as Hg]DAILY MX report only all year
002LC50 Static 48Hr Acute Ceriodaphnia dubiaDAILY MN report only all year
002%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AVG <= 25 % all year
002%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX <= 40 % all year
002IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MN report only all year
02AFlow, in conduit or thru treatment plantMO AVG report only all year
02AFlow, in conduit or thru treatment plantDAILY MX report only all year
02AChlorine, free availableMO AVG <= .2 mg/L all year
02AChlorine, free availableDAILY MX <= .5 mg/L all year
02ENitrite + Nitrate total [as N]MO AVG <= 3 mg/L all year
02ENitrite + Nitrate total [as N]DAILY MX <= 4 mg/L all year
02EArsenic, total [as As]MO AVG <= 8 ug/L all year
02EArsenic, total [as As]DAILY MX <= 18 ug/L all year
02ESelenium, total [as Se]MO AVG <= 29 ug/L all year
02ESelenium, total [as Se]DAILY MX <= 70 ug/L all year
02EFlow, in conduit or thru treatment plantMO AVG report only all year
02EFlow, in conduit or thru treatment plantDAILY MX report only all year
02EMercury, total [as Hg]MO AVG <= 34 ng/L all year
02EMercury, total [as Hg]DAILY MX <= 103 ng/L all year
02FFlow, in conduit or thru treatment plantMO AVG report only all year
02FFlow, in conduit or thru treatment plantDAILY MX report only all year
02FNumber of EventsMO TOTAL <= 0 # exceed all year
02FFlowDAILY MX <= 11492 gal/d 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