Duke Energy Carolinas, LLC - Oconee Nuclear Station

NPDES permit SC0000515 · Major NON-POTW · administratively continued, expires 2013-09-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2013-09-30 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 67 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 (48)

OutfallParameterStatisticLimitMonths
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 <= 103 deg F all year
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX <= 100 deg F 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
001Temp. diff. between intake and dischargeDAILY MX <= 22 deg F all year
002pHINST MIN >= 6 SU all year
002pHINST MAX <= 8.5 SU all year
002Solids, total suspendedMO AVG <= 21.7 mg/L all year
002Solids, total suspendedDAILY MX <= 43.8 mg/L all year
002Oil & GreaseMO AVG <= 3.07 mg/L all year
002Oil & GreaseDAILY MX <= 4.09 mg/L 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 <= .011 mg/L all year
002Chlorine, total residualDAILY MX <= .019 mg/L 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
002Pass/Fail Static 48Hr Acute Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
004pHINST MAX <= 8.5 SU all year
004pHINST MIN report only all year
004pHINST MAX report only all year
004pHINST MIN >= 6 SU all year
004pHINST MAX <= .1 SU all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
005Solids, total suspendedMO AVG <= 30 mg/L all year
005Solids, total suspendedDAILY MX <= 100 mg/L all year
005Oil & GreaseMO AVG <= 15 mg/L all year
005Oil & GreaseDAILY MX <= 20 mg/L all year
005Iron, total recoverableMO AVG <= 1 mg/L all year
005Iron, total recoverableDAILY MX <= 1 mg/L all year
005Copper, total recoverableMO AVG <= 1 mg/L all year
005Copper, total recoverableDAILY MX <= 1 mg/L all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
006BOD, 5-day, 20 deg. CDAILY MX report only all year
006Nitrogen, nitrate total [as N]DAILY MX report only all year
006Carbon, tot organic [TOC]DAILY MX report only all year
006Selenium, total recoverableDAILY MX report only all year
006Zinc, total recoverableDAILY MX report only all year
006Copper, total recoverableDAILY MX report only all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
007Oil and grease visualDAILY MX <= 0 N=0;Y=1 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