IKEC - CLIFTY CREEK STATION — NPDES permit IN0001759: limits, due date and EPA's record

NPDES permit IN0001759 · Major NON-POTW · effective, expires 2027-11-30 · EPA's file as of 2026-09-19

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

Last period with anything received: 2026-07-31. Most often over: Selenium, total recoverable (3), pH (1).

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 (291)

Outfall	Parameter	Statistic	Limit	Months
001	pH	DAILY MN	>= 6 SU	all year
001	pH	DAILY MX	<= 9 SU	all year
001	Solids, total suspended	MO AVG	<= 30 mg/L	all year
001	Solids, total suspended	DAILY MX	<= 50 mg/L	all year
001	Oil and grease, hexane extr method	MO AVG	<= 15 mg/L	all year
001	Oil and grease, hexane extr method	DAILY MX	<= 20 mg/L	all year
001	Arsenic, total recoverable	MO AVG	report only	all year
001	Arsenic, total recoverable	DAILY MX	report only	all year
001	Selenium, total recoverable	MO AVG	report only	all year
001	Selenium, total recoverable	DAILY MX	report only	all year
001	Boron, total [as B]	MO AVG	report only	all year
001	Boron, total [as B]	DAILY MX	report only	all year
001	Zinc, total recoverable	MO AVG	report only	all year
001	Zinc, total recoverable	DAILY MX	report only	all year
001	Aluminum, total recoverable	MO AVG	report only	all year
001	Aluminum, total recoverable	DAILY MX	report only	all year
001	Cadmium, total recoverable	MO AVG	report only	all year
001	Cadmium, total recoverable	DAILY MX	report only	all year
001	Copper, total recoverable	MO AVG	report only	all year
001	Copper, 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	Mercury, total recoverable	MO AVG	<= 12 ng/L	Feb, Apr, Jun, Aug, Oct, Dec
001	Mercury, total recoverable	DAILY MX	<= 20 ng/L	Feb, Apr, Jun, Aug, Oct, Dec
001	Flow, total	MO TOTAL	report only	all year
002	BOD, 5-day, 20 deg. C	MO AVG	report only	all year
002	BOD, 5-day, 20 deg. C	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	MO AVG	<= 28.4 mg/L	all year
002	Solids, total suspended	DAILY MX	<= 94.1 mg/L	all year
002	Oil and grease, hexane extr method	MO AVG	<= 10 mg/L	all year
002	Oil and grease, hexane extr method	DAILY MX	<= 15 mg/L	all year
002	Nitrogen, ammonia total [as N]	MO AVG	<= 3.7 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
002	Nitrogen, ammonia total [as N]	MO AVG	<= 12.1 mg/L	Jan, Feb, Mar, Apr, Dec
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 7.4 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 24.3 mg/L	Jan, Feb, Mar, Apr, Dec
002	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
002	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
002	Chloride [as Cl]	MO AVG	report only	all year
002	Chloride [as Cl]	DAILY MX	report only	all year
002	Sulfate, total [as SO4]	MO AVG	report only	all year
002	Sulfate, total [as SO4]	DAILY MX	report only	all year
002	Fluoride, total [as F]	MO AVG	report only	all year
002	Fluoride, total [as F]	DAILY MX	report only	all year
002	Arsenic, total recoverable	MO AVG	report only	all year
002	Arsenic, total recoverable	DAILY MX	report only	all year
002	Selenium, total recoverable	MO AVG	report only	all year
002	Selenium, total recoverable	DAILY MX	report only	all year
002	Boron, total [as B]	MO AVG	report only	all year
002	Boron, total [as B]	DAILY MX	report only	all year
002	Nickel, total recoverable	MO AVG	report only	all year
002	Nickel, total recoverable	DAILY MX	report only	all year
002	Zinc, total recoverable	MO AVG	report only	all year
002	Zinc, total recoverable	DAILY MX	report only	all year
002	Aluminum, total recoverable	MO AVG	report only	all year
002	Aluminum, total recoverable	DAILY MX	report only	all year
002	Cadmium, total recoverable	MO AVG	<= 3.1 ug/L	all year
002	Cadmium, total recoverable	DAILY MX	<= 5.4 ug/L	all year
002	Copper, total recoverable	MO AVG	report only	all year
002	Copper, total recoverable	DAILY MX	report only	all year
002	Manganese, total recoverable	MO AVG	report only	all year
002	Manganese, total recoverable	DAILY MX	report only	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	Flow, in conduit or thru treatment plant	MO AVG	<= .32 MGD	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute	May, Nov
002	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute	Jun, Dec
002	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 73 tox chronic	May, Nov
002	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 73 tox chronic	Jun, Dec
002	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute	May, Nov
002	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute	Jun, Dec
002	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 73 tox chronic	May, Nov
002	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 73 tox chronic	Jun, Dec
002	Bromide [as Br]	MO AVG	report only	Mar, Jun, Sep, Dec
002	Bromide [as Br]	MO AVG	report only	Mar, Jun, Sep, Dec
002	Bromide [as Br]	DAILY MX	report only	Mar, Jun, Sep, Dec
002	Bromide [as Br]	DAILY MX	report only	Mar, Jun, Sep, Dec
002	Mercury, total recoverable	MO AVG	<= 12 ng/L	Feb, Apr, Jun, Aug, Oct, Dec
002	Mercury, total recoverable	DAILY MX	<= 20 ng/L	Feb, Apr, Jun, Aug, Oct, Dec
002	Flow, total	MO TOTAL	report only	all year
003	Temperature, water deg. fahrenheit	MO AVG	report only	all year
003	Temperature, water deg. fahrenheit	DAILY MX	<= 110 deg F	all year
003	Temperature, water deg. fahrenheit	MO AVG	report only	all year
003	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
003	Temperature, water deg. fahrenheit	MO AVG	report only	all year
003	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
003	Temp. diff. between samp. & upstrm deg. F	MO AVG	report only	all year
003	Temp. diff. between samp. & upstrm deg. F	DAILY MX	<= 12 deg F	all year
003	Chlorine, total residual [dsg. time]	DAILY MX	<= 40 min/d	all year
003	pH	DAILY MN	>= 6 SU	all year
003	pH	DAILY MX	<= 9 SU	all year
003	Oxidants, total residual	MO AVG	<= .06 mg/L	all year
003	Oxidants, total residual	DAILY MX	< .06 mg/L	all year
003	Temperature, length of excursion	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	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	Chlorine, total residual	DAILY MX	<= .2 mg/L	all year
003	Chlorine, total residual	MO AVG	< .06 mg/L	all year
003	Chlorine, total residual	DAILY MX	< .06 mg/L	all year
003	Time of bromine addition	DAILY MX	<= 120 min/d	all year
003	Chlorination frequency	DAILY MX	<= 4 occur/d	all year
003	Chlorination duration	DAILY MX	<= 120 min/d	all year
003	Flow, total	MO TOTAL	report only	all year
008	pH	DAILY MX	report only	Dec
008	pH	DAILY MX	report only	Dec
008	Solids, total suspended	DAILY MX	report only	Dec
008	Solids, total suspended	DAILY MX	report only	Dec
008	Oil and grease, hexane extr method	DAILY MX	report only	Dec
008	Oil and grease, hexane extr method	DAILY MX	report only	Dec
008	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
008	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
008	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
008	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
008	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
008	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
008	Phosphorus, total [as P]	DAILY MX	report only	Dec
008	Phosphorus, total [as P]	DAILY MX	report only	Dec
008	Selenium, total recoverable	DAILY MX	report only	Dec
008	Selenium, total recoverable	DAILY MX	report only	Dec
008	Boron, total [as B]	DAILY MX	report only	Dec
008	Boron, total [as B]	DAILY MX	report only	Dec
008	Zinc, total recoverable	DAILY MX	report only	Dec
008	Zinc, total recoverable	DAILY MX	report only	Dec
008	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
008	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
008	Storm water flow	ET	report only	Dec
008	Storm water flow	ET	report only	Dec
013	pH	DAILY MX	report only	Dec
013	pH	DAILY MX	report only	Dec
013	Solids, total suspended	DAILY MX	report only	Dec
013	Solids, total suspended	DAILY MX	report only	Dec
013	Oil and grease, hexane extr method	DAILY MX	report only	Dec
013	Oil and grease, hexane extr method	DAILY MX	report only	Dec
013	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
013	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
013	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
013	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
013	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
013	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
013	Phosphorus, total [as P]	DAILY MX	report only	Dec
013	Phosphorus, total [as P]	DAILY MX	report only	Dec
013	Selenium, total recoverable	DAILY MX	report only	Dec
013	Selenium, total recoverable	DAILY MX	report only	Dec
013	Boron, total [as B]	DAILY MX	report only	Dec
013	Boron, total [as B]	DAILY MX	report only	Dec
013	Zinc, total recoverable	DAILY MX	report only	Dec
013	Zinc, total recoverable	DAILY MX	report only	Dec
013	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
013	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
013	Storm water flow	ET	report only	Dec
013	Storm water flow	ET	report only	Dec
018	pH	DAILY MX	report only	Dec
018	pH	DAILY MX	report only	Dec
018	Solids, total suspended	DAILY MX	report only	Dec
018	Solids, total suspended	DAILY MX	report only	Dec
018	Oil and grease, hexane extr method	DAILY MX	report only	Dec
018	Oil and grease, hexane extr method	DAILY MX	report only	Dec
018	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
018	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
018	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
018	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
018	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
018	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
018	Phosphorus, total [as P]	DAILY MX	report only	Dec
018	Phosphorus, total [as P]	DAILY MX	report only	Dec
018	Selenium, total recoverable	DAILY MX	report only	Dec
018	Selenium, total recoverable	DAILY MX	report only	Dec
018	Boron, total [as B]	DAILY MX	report only	Dec
018	Boron, total [as B]	DAILY MX	report only	Dec
018	Zinc, total recoverable	DAILY MX	report only	Dec
018	Zinc, total recoverable	DAILY MX	report only	Dec
018	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
018	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
018	Storm water flow	ET	report only	Dec
018	Storm water flow	ET	report only	Dec
028	pH	DAILY MX	report only	Dec
028	pH	DAILY MX	report only	Dec
028	Solids, total suspended	DAILY MX	report only	Dec
028	Solids, total suspended	DAILY MX	report only	Dec
028	Oil and grease, hexane extr method	DAILY MX	report only	Dec
028	Oil and grease, hexane extr method	DAILY MX	report only	Dec
028	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
028	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
028	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
028	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
028	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
028	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
028	Phosphorus, total [as P]	DAILY MX	report only	Dec
028	Phosphorus, total [as P]	DAILY MX	report only	Dec
028	Selenium, total recoverable	DAILY MX	report only	Dec
028	Selenium, total recoverable	DAILY MX	report only	Dec
028	Boron, total [as B]	DAILY MX	report only	Dec
028	Boron, total [as B]	DAILY MX	report only	Dec
028	Zinc, total recoverable	DAILY MX	report only	Dec
028	Zinc, total recoverable	DAILY MX	report only	Dec
028	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
028	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
028	Storm water flow	ET	report only	Dec
028	Storm water flow	ET	report only	Dec
030	pH	DAILY MX	report only	Dec
030	pH	DAILY MX	report only	Dec
030	Solids, total suspended	DAILY MX	report only	Dec
030	Solids, total suspended	DAILY MX	report only	Dec
030	Oil and grease, hexane extr method	DAILY MX	report only	Dec
030	Oil and grease, hexane extr method	DAILY MX	report only	Dec
030	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
030	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
030	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
030	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
030	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
030	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
030	Phosphorus, total [as P]	DAILY MX	report only	Dec
030	Phosphorus, total [as P]	DAILY MX	report only	Dec
030	Selenium, total recoverable	DAILY MX	report only	Dec
030	Selenium, total recoverable	DAILY MX	report only	Dec
030	Boron, total [as B]	DAILY MX	report only	Dec
030	Boron, total [as B]	DAILY MX	report only	Dec
030	Zinc, total recoverable	DAILY MX	report only	Dec
030	Zinc, total recoverable	DAILY MX	report only	Dec
030	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
030	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
030	Storm water flow	ET	report only	Dec
030	Storm water flow	ET	report only	Dec
031	pH	DAILY MX	report only	Dec
031	pH	DAILY MX	report only	Dec
031	Solids, total suspended	DAILY MX	report only	Dec
031	Solids, total suspended	DAILY MX	report only	Dec
031	Oil and grease, hexane extr method	DAILY MX	report only	Dec
031	Oil and grease, hexane extr method	DAILY MX	report only	Dec
031	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
031	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
031	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
031	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
031	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
031	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
031	Phosphorus, total [as P]	DAILY MX	report only	Dec
031	Phosphorus, total [as P]	DAILY MX	report only	Dec
031	Selenium, total recoverable	DAILY MX	report only	Dec
031	Selenium, total recoverable	DAILY MX	report only	Dec
031	Boron, total [as B]	DAILY MX	report only	Dec
031	Boron, total [as B]	DAILY MX	report only	Dec
031	Zinc, total recoverable	DAILY MX	report only	Dec
031	Zinc, total recoverable	DAILY MX	report only	Dec
031	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
031	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
031	Storm water flow	ET	report only	Dec
031	Storm water flow	ET	report only	Dec
032	pH	DAILY MX	report only	Dec
032	pH	DAILY MX	report only	Dec
032	Solids, total suspended	DAILY MX	report only	Dec
032	Solids, total suspended	DAILY MX	report only	Dec
032	Oil and grease, hexane extr method	DAILY MX	report only	Dec
032	Oil and grease, hexane extr method	DAILY MX	report only	Dec
032	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
032	Nitrogen, ammonia total [as N]	DAILY MX	report only	Dec
032	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
032	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Dec
032	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
032	Nitrite + Nitrate total [as N]	DAILY MX	report only	Dec
032	Phosphorus, total [as P]	DAILY MX	report only	Dec
032	Phosphorus, total [as P]	DAILY MX	report only	Dec
032	Selenium, total recoverable	DAILY MX	report only	Dec
032	Selenium, total recoverable	DAILY MX	report only	Dec
032	Boron, total [as B]	DAILY MX	report only	Dec
032	Boron, total [as B]	DAILY MX	report only	Dec
032	Zinc, total recoverable	DAILY MX	report only	Dec
032	Zinc, total recoverable	DAILY MX	report only	Dec
032	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
032	Chemical Oxygen Demand [COD]	DAILY MX	report only	Dec
032	Storm water flow	ET	report only	Dec
032	Storm water flow	ET	report only	Dec
201	pH	DAILY MN	>= 6 SU	all year
201	pH	DAILY MX	<= 9 SU	all year
201	Solids, total suspended	MO AVG	<= 30 mg/L	all year
201	Solids, total suspended	DAILY MX	<= 100 mg/L	all year
201	Oil and grease, hexane extr method	MO AVG	<= 15 mg/L	all year
201	Oil and grease, hexane extr method	DAILY MX	<= 20 mg/L	all year
201	Nitrite + Nitrate total [as N]	MO AVG	<= 3 mg/L	all year
201	Nitrite + Nitrate total [as N]	DAILY MX	<= 4 mg/L	all year
201	Arsenic, total recoverable	MO AVG	<= 8 ug/L	all year
201	Arsenic, total recoverable	DAILY MX	<= 18 ug/L	all year
201	Selenium, total recoverable	MO AVG	<= 29 ug/L	all year
201	Selenium, total recoverable	DAILY MX	<= 70 ug/L	all year
201	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
201	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
201	Mercury, total recoverable	MO AVG	<= 34 ng/L	Feb, Apr, Jun, Aug, Oct, Dec
201	Mercury, total recoverable	DAILY MX	<= 103 ng/L	Feb, Apr, Jun, Aug, Oct, Dec