ENERGY HARBOR NUCLEAR CORP — NPDES permit PA0025615: limits, due date and EPA's record

NPDES permit PA0025615 · Major NON-POTW · effective, expires 2026-10-31 · EPA's file as of 2026-09-19

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

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among PA permits in EPA's filings — check your permit).

Limits in force (270)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. fahrenheit	DAILY MX	<= 110 deg F	all year
001	pH	INST MIN	>= 6 SU	all year
001	pH	INST MAX	<= 9 SU	all year
001	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
001	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
001	Chromium, total [as Cr]	MO AVG	<= .2 mg/L	all year
001	Chromium, total [as Cr]	DAILY MX	<= .2 mg/L	all year
001	Copper, total [as Cu]	MO AVG	report only	all year
001	Copper, total [as Cu]	DAILY MX	report only	all year
001	Iron, total [as Fe]	MO AVG	report only	all year
001	Iron, total [as Fe]	DAILY MX	report only	all year
001	Zinc, total [as Zn]	MO AVG	<= 1 mg/L	all year
001	Zinc, total [as Zn]	DAILY MX	<= 1 mg/L	all year
001	Aluminum, total [as Al]	MO AVG	report only	all year
001	Aluminum, total [as Al]	DAILY MX	report only	all year
001	Phenolics, total recoverable	MO AVG	report only	all year
001	Phenolics, total recoverable	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	DAILY MX	report only	all year
001	Chlorine, total residual	MO AVG	<= .5 mg/L	all year
001	Chlorine, total residual	INST MAX	<= 1.25 mg/L	all year
001	Chlorine, free available	MO AVG	<= .2 mg/L	all year
001	Chlorine, free available	DAILY MX	<= .5 mg/L	all year
001	Nalco H150M	MO AVG	<= .034 mg/L	all year
001	Nalco H150M	DAILY MX	<= .034 mg/L	all year
001	Mercury, total [as Hg]	MO AVG	<= .2 ug/L	all year
001	Mercury, total [as Hg]	DAILY MX	<= .2 ug/L	all year
001	Hydrazine	MO AVG	<= .007 mg/L	all year
001	Hydrazine	DAILY MX	<= .007 mg/L	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
003	pH	DAILY MX	report only	all year
003	Solids, total suspended	DAILY MX	report only	all year
003	Oil & Grease	DAILY MX	report only	all year
003	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
003	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
003	Iron, total [as Fe]	DAILY MX	report only	all year
003	Aluminum, total [as Al]	MO AVG	report only	all year
003	Aluminum, total [as Al]	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	Nalco H150M	MO AVG	<= .034 mg/L	all year
003	Nalco H150M	DAILY MX	<= .034 mg/L	all year
003	Mercury, total [as Hg]	MO AVG	<= .2 ug/L	all year
003	Mercury, total [as Hg]	DAILY MX	<= .2 ug/L	all year
003	Hydrazine	MO AVG	<= .007 mg/L	all year
003	Hydrazine	DAILY MX	<= .007 mg/L	all year
004	Temperature, water deg. fahrenheit	DAILY MX	<= 110 deg F	all year
004	pH	INST MIN	>= 6 SU	all year
004	pH	INST MAX	<= 9 SU	all year
004	Chromium, total [as Cr]	MO AVG	<= .2 mg/L	all year
004	Chromium, total [as Cr]	DAILY MX	<= .2 mg/L	all year
004	Copper, total [as Cu]	MO AVG	report only	all year
004	Copper, total [as Cu]	DAILY MX	report only	all year
004	Zinc, total [as Zn]	MO AVG	<= 1 mg/L	all year
004	Zinc, total [as Zn]	DAILY MX	<= 1 mg/L	all year
004	Aluminum, total [as Al]	MO AVG	report only	all year
004	Aluminum, total [as Al]	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	INST MAX	<= 1.25 mg/L	all year
004	Chlorine, free available	MO AVG	<= .2 mg/L	all year
004	Chlorine, free available	DAILY MX	<= .5 mg/L	all year
004	Mercury, total [as Hg]	DAILY MX	report only	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	Temperature, water deg. fahrenheit	DAILY MX	<= 110 deg F	all year
007	pH	INST MIN	>= 6 SU	all year
007	pH	INST MAX	<= 9 SU	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
007	Chlorine, total residual	DAILY MX	<= .2 mg/L	all year
007	Chlorine, free available	MO AVG	<= .2 mg/L	all year
007	Chlorine, free available	DAILY MX	<= .5 mg/L	all year
007	Nalco H150M	MO AVG	<= .034 mg/L	all year
007	Nalco H150M	DAILY MX	<= .034 mg/L	all year
008	pH	DAILY MX	report only	all year
008	Solids, total suspended	DAILY MX	report only	all year
008	Oil & Grease	DAILY MX	report only	all year
008	Iron, total [as Fe]	DAILY MX	report only	all year
008	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
010	Temperature, water deg. fahrenheit	DAILY MX	<= 110 deg F	all year
010	pH	INST MIN	>= 6 SU	all year
010	pH	INST MAX	<= 9 SU	all year
010	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
010	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
010	Chlorine, total residual	DAILY MX	<= .2 mg/L	all year
010	Chlorine, free available	MO AVG	<= .2 mg/L	all year
010	Chlorine, free available	DAILY MX	<= .5 mg/L	all year
010	Nalco H150M	MO AVG	<= .034 mg/L	all year
010	Nalco H150M	DAILY MX	<= .034 mg/L	all year
010	Mercury, total [as Hg]	MO AVG	report only	all year
010	Mercury, total [as Hg]	DAILY MX	report only	all year
011	pH	DAILY MX	report only	all year
011	Solids, total suspended	DAILY MX	report only	all year
011	Oil & Grease	DAILY MX	report only	all year
011	Iron, total [as Fe]	DAILY MX	report only	all year
011	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
011	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
011	Mercury, total [as Hg]	MO AVG	<= .2 ug/L	all year
011	Mercury, total [as Hg]	DAILY MX	<= .2 ug/L	all year
012	pH	INST MIN	>= 6 SU	all year
012	pH	INST MAX	<= 9 SU	all year
012	Solids, total suspended	DAILY MX	report only	all year
012	Oil & Grease	DAILY MX	report only	all year
012	Cadmium, total [as Cd]	MO AVG	report only	all year
012	Cadmium, total [as Cd]	DAILY MX	report only	all year
012	Copper, total [as Cu]	MO AVG	report only	all year
012	Copper, total [as Cu]	DAILY MX	report only	all year
012	Iron, total [as Fe]	DAILY MX	report only	all year
012	Zinc, total [as Zn]	MO AVG	report only	all year
012	Zinc, total [as Zn]	DAILY MX	report only	all year
012	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
012	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
013	pH	INST MIN	>= 6 SU	all year
013	pH	INST MAX	<= 9 SU	all year
013	Solids, total suspended	DAILY MX	report only	all year
013	Oil & Grease	DAILY MX	report only	all year
013	Copper, total [as Cu]	MO AVG	report only	all year
013	Copper, total [as Cu]	DAILY MX	report only	all year
013	Iron, total [as Fe]	DAILY MX	report only	all year
013	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
013	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
014	pH	DAILY MX	report only	all year
014	Solids, total suspended	DAILY MX	report only	all year
014	Oil & Grease	DAILY MX	report only	all year
014	Iron, total [as Fe]	DAILY MX	report only	all year
014	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
015	pH	DAILY MX	report only	all year
015	Solids, total suspended	DAILY MX	report only	all year
015	Oil & Grease	DAILY MX	report only	all year
015	Iron, total [as Fe]	DAILY MX	report only	all year
015	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
016	pH	DAILY MX	report only	all year
016	Solids, total suspended	DAILY MX	report only	all year
016	Oil & Grease	DAILY MX	report only	all year
016	Iron, total [as Fe]	DAILY MX	report only	all year
016	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
017	pH	DAILY MX	report only	all year
017	Solids, total suspended	DAILY MX	report only	all year
017	Oil & Grease	DAILY MX	report only	all year
017	Iron, total [as Fe]	DAILY MX	report only	all year
017	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
019	pH	DAILY MX	report only	all year
019	Solids, total suspended	DAILY MX	report only	all year
019	Oil & Grease	DAILY MX	report only	all year
019	Iron, total [as Fe]	DAILY MX	report only	all year
019	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
101	pH	INST MIN	>= 6 SU	all year
101	pH	INST MAX	<= 9 SU	all year
101	Solids, total suspended	MO AVG	<= 30 mg/L	all year
101	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
101	Oil & Grease	MO AVG	<= 15 mg/L	all year
101	Oil & Grease	DAILY MX	<= 20 mg/L	all year
101	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
101	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
101	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
101	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
101	Hydrazine	MO AVG	report only	all year
101	Hydrazine	DAILY MX	report only	all year
102	pH	INST MIN	>= 6 SU	all year
102	pH	INST MAX	<= 9 SU	all year
102	Solids, total suspended	MO AVG	<= 30 mg/L	all year
102	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
102	Oil & Grease	MO AVG	<= 15 mg/L	all year
102	Oil & Grease	DAILY MX	<= 20 mg/L	all year
102	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
102	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
103	pH	INST MIN	>= 6 SU	all year
103	pH	INST MAX	<= 9 SU	all year
103	Solids, total suspended	MO AVG	<= 30 mg/L	all year
103	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
103	Oil & Grease	MO AVG	<= 15 mg/L	all year
103	Oil & Grease	DAILY MX	<= 20 mg/L	all year
103	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
103	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
108	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
108	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
108	Chlorine, total residual	MO AVG	report only	all year
108	Chlorine, total residual	DAILY MX	report only	all year
111	pH	INST MIN	>= 6 SU	all year
111	pH	INST MAX	<= 9 SU	all year
111	Solids, total suspended	MO AVG	<= 30 mg/L	all year
111	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
111	Oil & Grease	MO AVG	<= 15 mg/L	all year
111	Oil & Grease	DAILY MX	<= 20 mg/L	all year
111	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
111	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
211	pH	INST MIN	>= 6 SU	all year
211	pH	INST MAX	<= 9 SU	all year
211	Solids, total suspended	MO AVG	<= 30 mg/L	all year
211	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
211	Oil & Grease	MO AVG	<= 15 mg/L	all year
211	Oil & Grease	DAILY MX	<= 20 mg/L	all year
211	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
211	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
301	Solids, total suspended	MO AVG	<= 30 mg/L	all year
301	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
301	Oil & Grease	MO AVG	<= 15 mg/L	all year
301	Oil & Grease	DAILY MX	<= 20 mg/L	all year
301	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
301	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
303	pH	INST MIN	>= 6 SU	all year
303	pH	INST MAX	<= 9 SU	all year
303	Solids, total suspended	MO AVG	<= 30 mg/L	all year
303	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
303	Oil & Grease	MO AVG	<= 15 mg/L	all year
303	Oil & Grease	DAILY MX	<= 20 mg/L	all year
303	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
303	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
313	pH	INST MIN	>= 6 SU	all year
313	pH	INST MAX	<= 9 SU	all year
313	Solids, total suspended	MO AVG	<= 30 mg/L	all year
313	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
313	Oil & Grease	MO AVG	<= 15 mg/L	all year
313	Oil & Grease	DAILY MX	<= 20 mg/L	all year
313	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
313	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
401	pH	INST MIN	>= 6 SU	all year
401	Solids, total suspended	MO AVG	<= 30 mg/L	all year
401	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
401	Oil & Grease	MO AVG	<= 15 mg/L	all year
401	Oil & Grease	DAILY MX	<= 20 mg/L	all year
401	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
401	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
403	pH	INST MIN	>= 6 SU	all year
403	pH	INST MAX	<= 9 SU	all year
403	Solids, total suspended	MO AVG	<= 30 mg/L	all year
403	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
403	Oil & Grease	MO AVG	<= 15 mg/L	all year
403	Oil & Grease	DAILY MX	<= 20 mg/L	all year
403	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
403	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
403	Chromium, total [as Cr]	MO AVG	<= .2 mg/L	all year
403	Chromium, total [as Cr]	DAILY MX	<= .2 mg/L	all year
403	Zinc, total [as Zn]	MO AVG	<= 1 mg/L	all year
403	Zinc, total [as Zn]	DAILY MX	<= 1 mg/L	all year
403	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
403	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
403	Chlorine, total residual	MO AVG	<= .5 mg/L	all year
403	Chlorine, total residual	INST MAX	<= 1.25 mg/L	all year
403	Nalco H150M	MO AVG	<= .034 mg/L	all year
403	Nalco H150M	DAILY MX	<= .034 mg/L	all year
403	Hydrazine	MO AVG	<= .007 mg/L	all year
403	Hydrazine	DAILY MX	<= .007 mg/L	all year
601	pH	INST MIN	>= 6 SU	all year
601	pH	INST MAX	<= 9 SU	all year
601	Solids, total suspended	MO AVG	<= 30 mg/L	all year
601	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
601	Oil & Grease	MO AVG	<= 15 mg/L	all year
601	Oil & Grease	DAILY MX	<= 20 mg/L	all year
601	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
601	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
601	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
601	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
601	Hydrazine	MO AVG	report only	all year
601	Hydrazine	DAILY MX	report only	all year
701	pH	INST MIN	>= 6 SU	all year
701	pH	INST MAX	<= 9 SU	all year
701	Solids, total suspended	MO AVG	<= 30 mg/L	all year
701	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
701	Oil & Grease	MO AVG	<= 15 mg/L	all year
701	Oil & Grease	DAILY MX	<= 20 mg/L	all year
701	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
701	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
701	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
701	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
701	Hydrazine	MO AVG	report only	all year
701	Hydrazine	DAILY MX	report only	all year