Duke Energy Carolinas, LLC — NPDES permit SC0002291: limits, due date and EPA's record

NPDES permit SC0002291 · Major NON-POTW · administratively continued, expires 2021-03-31 · EPA's file as of 2026-09-19

This permit expired on 2021-03-31 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

Reporting

Reports are due about 29 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (169)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. fahrenheit	MO AVG	<= 96 deg F	Jul, Aug, Sep
001	Temperature, water deg. fahrenheit	MO AVG	<= 90 deg F	Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001	Temperature, water deg. fahrenheit	DAILY MX	<= 90 deg F	all year
001	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
001	Temperature, water deg. fahrenheit	DAILY MX	<= 10 deg F	Jan, Feb, Nov, Dec
001	Temperature, water deg. fahrenheit	DAILY MX	<= 5 deg F	Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001	Oxygen demand, ultimate	MO AVG	report only	all year
001	Oxygen demand, ultimate	MO AVG	report only	all year
001	pH	INST MIN	>= 6 SU	all year
001	pH	INST MIN	>= 6 SU	all year
001	pH	INST MAX	<= 8.5 SU	all year
001	pH	INST MAX	<= 8.5 SU	all year
001	Solids, total suspended	MO AVG	report only	all year
001	Solids, total suspended	MO AVG	report only	all year
001	Solids, total suspended	DAILY MX	report only	all year
001	Solids, total suspended	DAILY MX	report only	all year
001	Copper, total [as Cu]	MO AVG	= 38 ug/L	all year
001	Copper, total [as Cu]	MO AVG	<= 38 ug/L	all year
001	Copper, total [as Cu]	DAILY MX	= 39 ug/L	all year
001	Copper, total [as Cu]	DAILY MX	<= 39 ug/L	all year
001	Lead, total [as Pb]	MO AVG	<= 5 ug/L	all year
001	Lead, total [as Pb]	DAILY MX	<= 56 ug/L	all year
001	Thallium, total [as Tl]	MO AVG	report only	all year
001	Thallium, total [as Tl]	DAILY MX	report only	all year
001	Thallium, total [as Tl]	DAILY MX	report only	all year
001	Thallium, total [as Tl]	MO AVG	report only	all year
001	Thallium, total [as Tl]	DAILY MX	report only	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	LC50 Static 48Hr Acute Ceriodaphnia dubia	DAILY MX	report only	all year
001	%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	MO AVG	<= 25 %	all year
001	%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	DAILY MX	<= 40 %	all year
001	Pass/Fail Static 48Hr Acute Ceriodaphnia dubia	DAILY MX	<= 0 pass=0;fail=1	all year
001	IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia	MO AVG	report only	all year
003	Temperature, water deg. fahrenheit	DAILY MX	<= 90 deg F	all year
003	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
003	pH	INST MIN	>= 6 SU	all year
003	pH	INST MAX	<= 8.5 SU	all year
003	Solids, total suspended	MO AVG	report only	all year
003	Solids, total suspended	DAILY MX	report only	all year
003	Copper, total [as Cu]	MO AVG	report only	all year
003	Copper, total [as Cu]	DAILY MX	report only	all year
003	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
003	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
003	Number of Events	DAILY MX	report only	all year
003	Duration of discharge	DAILY MX	report only	all year
004	pH	INST MIN	>= 6 SU	all year
004	pH	INST MAX	<= 9 SU	all year
004	Solids, total suspended	MO AVG	<= 30 mg/L	all year
004	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
004	Oil & Grease	MO AVG	<= 15 mg/L	all year
004	Oil & Grease	DAILY MX	<= 20 mg/L	all year
004	Arsenic, total [as As]	MO AVG	report only	all year
004	Arsenic, total [as As]	DAILY MX	report only	all year
004	Beryllium, total [as Be]	MO AVG	<= 330 ug/L	all year
004	Beryllium, total [as Be]	DAILY MX	<= 660 ug/L	all year
004	Cadmium, total [as Cd]	MO AVG	report only	all year
004	Cadmium, total [as Cd]	DAILY MX	report only	all year
004	Chromium, total [as Cr]	MO AVG	report only	all year
004	Chromium, total [as Cr]	DAILY MX	report only	all year
004	Copper, total [as Cu]	MO AVG	<= 1180 ug/L	all year
004	Copper, total [as Cu]	DAILY MX	<= 1550 ug/L	all year
004	Iron, total [as Fe]	MO AVG	report only	all year
004	Iron, total [as Fe]	DAILY MX	report only	all year
004	Lead, total [as Pb]	MO AVG	<= 420 ug/L	all year
004	Lead, total [as Pb]	DAILY MX	<= 11050 ug/L	all year
004	Zinc, total [as Zn]	MO AVG	report only	all year
004	Zinc, total [as Zn]	DAILY MX	report only	all year
004	Selenium, total [as Se]	MO AVG	report only	all year
004	Selenium, total [as Se]	DAILY MX	report only	all year
004	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
004	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
004	Chlorine, total residual	MO AVG	<= .5 mg/L	all year
004	Chlorine, total residual	DAILY MX	<= 1 mg/L	all year
004	Solids, total dissolved	MO AVG	report only	all year
004	Solids, total dissolved	DAILY MX	report only	all year
004	Mercury, total [as Hg]	MO AVG	report only	all year
004	Mercury, total [as Hg]	DAILY MX	report only	all year
004	LC50 Static 48Hr Acute Ceriodaphnia dubia	DAILY MX	report only	all year
004	Pass/Fail Static 48Hr Acute Ceriodaphnia dubia	DAILY MX	= 0 pass=0;fail=1	all year
005	pH	INST MIN	>= 6 SU	all year
005	pH	INST MAX	<= 8.5 SU	all year
005	Solids, total suspended	MO AVG	<= 30 mg/L	all year
005	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
005	Oil & Grease	MO AVG	<= 15 mg/L	all year
005	Oil & Grease	DAILY MX	<= 20 mg/L	all year
005	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
005	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
006	pH	INST MIN	>= 6 SU	all year
006	pH	INST MAX	<= 8.5 SU	all year
006	Solids, total suspended	MO AVG	<= 30 mg/L	all year
006	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
006	Oil & Grease	MO AVG	<= 15 mg/L	all year
006	Oil & Grease	DAILY MX	<= 20 mg/L	all year
006	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
006	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
007	pH	INST MIN	>= 6 SU	all year
007	pH	INST MAX	<= 8.5 SU	all year
007	Solids, total suspended	MO AVG	<= 30 mg/L	all year
007	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
007	Oil & Grease	MO AVG	<= 15 mg/L	all year
007	Oil & Grease	DAILY MX	<= 20 mg/L	all year
007	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
007	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
008	Temperature, water deg. fahrenheit	MO AVG	report only	all year
008	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
008	Temperature, water deg. fahrenheit	MO AVG	report only	all year
008	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
008	Temperature, water deg. fahrenheit	MO AVG	report only	all year
008	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
008	pH	INST MIN	>= 6 SU	all year
008	pH	INST MIN	>= 6 SU	all year
008	pH	INST MAX	<= 8.5 SU	all year
008	pH	INST MAX	<= 8.5 SU	all year
008	Solids, total suspended	MO AVG	<= 30 mg/L	all year
008	Solids, total suspended	MO AVG	<= 30 mg/L	all year
008	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
008	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
008	Oil & Grease	MO AVG	<= 15 mg/L	all year
008	Oil & Grease	MO AVG	<= 15 mg/L	all year
008	Oil & Grease	DAILY MX	<= 20 mg/L	all year
008	Oil & Grease	DAILY MX	<= 20 mg/L	all year
008	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
008	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
008	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
008	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
008	LC50 Static 48Hr Acute Ceriodaphnia dubia	DAILY MX	report only	all year
008	%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	MO AVG	<= 25 %	all year
008	%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	DAILY MX	<= 40 %	all year
008	IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia	MO AVG	report only	all year
009	pH	INST MIN	>= 6 SU	all year
009	pH	INST MAX	<= 8.5 SU	all year
009	Solids, total suspended	MO AVG	<= 30 mg/L	all year
009	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
009	Oil & Grease	MO AVG	<= 15 mg/L	all year
009	Oil & Grease	DAILY MX	<= 20 mg/L	all year
009	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
009	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
01A	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
01A	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
01A	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
01A	Chlorine, free available	MO AVG	<= .2 mg/L	all year
01A	Chlorine, free available	DAILY MX	<= .5 mg/L	all year
01B	pH	INST MIN	>= 6 SU	all year
01B	pH	INST MAX	<= 9 SU	all year
01B	Solids, total suspended	MO AVG	<= 30 mg/L	all year
01B	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
01B	Oil & Grease	MO AVG	<= 15 mg/L	all year
01B	Oil & Grease	DAILY MX	<= 20 mg/L	all year
01B	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
01B	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
01C	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
01C	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
01C	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
08A	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
08A	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
08A	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
08A	Chlorine, free available	MO AVG	<= .2 mg/L	all year
08A	Chlorine, free available	DAILY MX	<= .5 mg/L	all year
08B	pH	INST MIN	>= 6 SU	all year
08B	pH	INST MAX	<= 9 SU	all year
08B	Solids, total suspended	MO AVG	<= 30 mg/L	all year
08B	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
08B	Oil & Grease	MO AVG	<= 15 mg/L	all year
08B	Oil & Grease	DAILY MX	<= 20 mg/L	all year
08B	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
08B	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year