Duke Energy Carolinas LLC — NPDES permit NC0004979: limits, due date and EPA's record

NPDES permit NC0004979 · Major NON-POTW · effective, expires 2029-12-31 · EPA's file as of 2026-09-19

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

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 (13)

Outfall	Parameter	Statistic	Limit	Months
002	Turbidity	DAILY MX	report only	all year
002	pH	DAILY MN	>= 6 SU	all year
002	pH	DAILY MX	<= 9 SU	all year
002	Solids, total suspended	30DA AVG	<= 30 mg/L	all year
002	Solids, total suspended	DAILY MX	<= 50 mg/L	all year
002	Oil & Grease	30DA AVG	<= 15 mg/L	all year
002	Oil & Grease	DAILY MX	<= 20 mg/L	all year
002	Nitrogen, total [as N]	DAILY MX	report only	all year
002	Phosphorus, total [as P]	DAILY MX	report only	all year
002	Hardness, total [as CaCO3]	DAILY MX	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	<= 3 MGD	all year
002	Solids, total dissolved	DAILY MX	report only	all year
002	Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia	DAILY MX	report only	all year