Duke Energy Carolinas LLC

NPDES permit NC0004774 · Major NON-POTW · effective, expires 2030-04-30 · 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.

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

0values over a limit
5required values missing, on 5 form(s)
0of 22 forms filed late

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

Reporting

Reports are due about 31 days after each monitoring period ends (the most common figure among NC permits in EPA's filings — check your permit).

Limits in force (30)

OutfallParameterStatisticLimitMonths
001ATemperature, water deg. centigradeDAILY MX <= 35 deg C all year
001ATemperature, water deg. centigradeDAILY MX <= 32 deg C all year
001ATemperature, water deg. centigradeDAILY MX report only all year
001ApHDAILY MN >= 6 SU all year
001ApHDAILY MX <= 9 SU all year
001ASolids, total suspended30DA AVG <= 23 mg/L all year
001ASolids, total suspendedDAILY MX <= 74 mg/L all year
001AOil & Grease30DA AVG <= 11 mg/L all year
001AOil & GreaseDAILY MX <= 15 mg/L all year
001AHardness, total [as CaCO3]DAILY MX report only all year
001AFlow, in conduit or thru treatment plantDAILY MX report only all year
001AChlorine, total residualDAILY MX <= 28 ug/L all year
001AChlorine, free available30DA AVG <= 200 ug/L all year
001AChlorine, free availableDAILY MX <= 500 ug/L all year
007TurbidityDAILY MX report only all year
007pHDAILY MN >= 6 SU all year
007pHDAILY MX <= 9 SU all year
007Solids, total suspended30DA AVG <= 23 mg/L all year
007Solids, total suspendedDAILY MX <= 74 mg/L all year
007Oil & Grease30DA AVG <= 11 mg/L all year
007Oil & GreaseDAILY MX <= 15 mg/L all year
007Nitrogen, total [as N]DAILY MX report only all year
007Phosphorus, total [as P]DAILY MX report only all year
007Hardness, total [as CaCO3]DAILY MX report only all year
007Arsenic, total [as As]DAILY MX report only all year
007Selenium, total [as Se]DAILY MX report only all year
007Flow, in conduit or thru treatment plant30DA AVG <= 1.2 MGD all year
007Solids, total dissolvedDAILY MX report only all year
007Mercury, total [as Hg]DAILY MX report only all year
007Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY 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