DUKE ENERGY INDIANA CAYUGA GENERATING STATION

NPDES permit IN0002763 · Major NON-POTW · effective, expires 2030-10-31 · 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
2required values missing, on 2 form(s)
0of 68 forms filed late

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

Reporting

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

Limits in force (153)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX report only Jan, Feb, Mar, Apr, Nov, Dec
001Temperature, water deg. fahrenheitDAILY MX report only May, Jun, Jul, Aug, Sep, Oct
001Temperature, water deg. fahrenheitDAILY MX report only May, Jun, Jul, Aug, Sep, Oct
001Temperature, water deg. fahrenheitDAILY MX report only Jan, Feb, Mar, Apr, Nov, Dec
001Temperature, water deg. fahrenheitDAILY MX <= 60 deg F Dec
001Temperature, water deg. fahrenheitDAILY MX <= 70 deg F Nov
001Temperature, water deg. fahrenheitDAILY MX <= 75 deg F Mar
001Temperature, water deg. fahrenheitDAILY MX <= 83 deg F May
001Temperature, water deg. fahrenheitDAILY MX <= 93 deg F Jun, Jul, Aug, Sep
001Temperature, water deg. fahrenheitDAILY MX <= 81 deg F Oct
001Temperature, water deg. fahrenheitDAILY MX <= 80 deg F Apr
001Temperature, water deg. fahrenheitDAILY MX <= 55 deg F Jan, Feb
001StreamflowMO AVG report only all year
001StreamflowDAILY MX report only all year
001Chlorine, total residual [dsg. time]DAILY MX <= 120 min/d all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Oil and grease, hexane extr methodMO AVG report only all year
001Oil and grease, hexane extr methodDAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG <= .77 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 1.4 mg/L Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 1.9 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 3.5 mg/L Jan, Feb, Mar, Apr, Dec
001Chloride [as Cl]MO AVG <= 410 mg/L all year
001Chloride [as Cl]DAILY MX <= 710 mg/L all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableDAILY MX report only all year
001Oxidants, total residualMO AVG < .06 mg/L all year
001Oxidants, total residualDAILY MX < .06 mg/L all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= .2 mg/L all year
001Chlorine, total residualMO AVG < .06 mg/L all year
001Chlorine, total residualDAILY MX < .06 mg/L all year
001Time of bromine additionDAILY MX report only all year
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Jan, Apr, Jul, Oct
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Feb, May, Aug, Nov
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1 tox chronic Jan, Apr, Jul, Oct
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1 tox chronic Feb, May, Aug, Nov
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Jan, Apr, Jul, Oct
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Feb, May, Aug, Nov
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox chronic Jan, Apr, Jul, Oct
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox chronic Feb, May, Aug, Nov
001Bromide [as Br]MO AVG report only all year
001Bromide [as Br]DAILY MX report only all year
001Mercury, total recoverableMO AVG <= 12 ng/L Feb, Apr, Jun, Aug, Oct, Dec
001Mercury, total recoverableDAILY MX <= 20 ng/L Feb, Apr, Jun, Aug, Oct, Dec
001Mercury, total recoverableMO AVG report only Feb, Apr, Jun, Aug, Oct, Dec
001Mercury, total recoverableDAILY MX report only Feb, Apr, Jun, Aug, Oct, Dec
001Chlorination frequencyDAILY MX <= 4 occur/d all year
001Chlorination durationDAILY MX <= 40 min all year
001Flow, totalMO TOTAL report only all year
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedMO AVG <= 29 mg/L all year
002Solids, total suspendedDAILY MX <= 95 mg/L all year
002Oil and grease, hexane extr methodMO AVG <= 11 mg/L all year
002Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
002Nitrogen, ammonia total [as N]MO AVG report only all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Chloride [as Cl]MO AVG report only all year
002Chloride [as Cl]DAILY MX report only all year
002Sulfate, total [as SO4]MO AVG report only all year
002Sulfate, total [as SO4]DAILY MX report only all year
002Arsenic, total recoverableMO AVG report only all year
002Arsenic, total recoverableDAILY MX report only all year
002Selenium, total recoverableMO AVG report only all year
002Selenium, total recoverableDAILY MX report only all year
002Zinc, total recoverableMO AVG report only all year
002Zinc, total recoverableDAILY MX report only all year
002Aluminum, total recoverableMO AVG report only all year
002Aluminum, total recoverableDAILY MX report only all year
002Aluminum, dissolved [as Al]MO AVG report only all year
002Aluminum, dissolved [as Al]DAILY MX report only all year
002Cadmium, total recoverableMO AVG report only all year
002Cadmium, total recoverableDAILY MX report only all year
002Copper, total recoverableMO AVG report only all year
002Copper, total recoverableDAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualMO AVG <= .06 mg/L all year
002Chlorine, total residualDAILY MX < .06 mg/L all year
002Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Jan, Apr, Jul, Oct
002Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Feb, May, Aug, Nov
002Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1.5 tox chronic Jan, Apr, Jul, Oct
002Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1.5 tox chronic Feb, May, Aug, Nov
002Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Jan, Apr, Jul, Oct
002Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Feb, May, Aug, Nov
002Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1.5 tox chronic Jan, Apr, Jul, Oct
002Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1.5 tox chronic Feb, May, Aug, Nov
002Bromide [as Br]MO AVG report only all year
002Bromide [as Br]DAILY MX report only all year
002Mercury, total recoverableMO AVG report only Feb, Apr, Jun, Aug, Oct, Dec
002Mercury, total recoverableDAILY MX report only Feb, Apr, Jun, Aug, Oct, Dec
002Flow, totalMO TOTAL report only all year
004pHDAILY MX report only Jun, Dec
004pHDAILY MX report only Jun, Dec
004Solids, total suspendedDAILY MX report only Jun, Dec
004Solids, total suspendedDAILY MX report only Jun, Dec
004Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
004Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
004Selenium, total recoverableDAILY MX report only all year
004Zinc, total recoverableDAILY MX report only all year
004Benzene, ethylbenzene, toluene, xylene combinationDAILY MX report only Jun, Dec
004Benzene, ethylbenzene, toluene, xylene combinationDAILY MX report only Jun, Dec
004BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
004BOD, carbonaceous [5 day, 20 C]DAILY MX report only Jun, Dec
004Storm water flowDAILY MX report only Jun, Dec
004Storm water flowDAILY MX report only Jun, Dec
004Flow, totalST report only Jun, Dec
004Flow, totalST report only Jun, Dec
101pHDAILY MN >= 6 SU all year
101pHDAILY MX <= 9 SU all year
101Solids, total suspendedMO AVG <= 30 mg/L all year
101Solids, total suspendedDAILY MX <= 100 mg/L all year
101Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
101Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
101Nitrogen, ammonia total [as N]MO AVG report only all year
101Nitrogen, ammonia total [as N]DAILY MX report only all year
101Nitrite + Nitrate total [as N]MO AVG report only all year
101Nitrite + Nitrate total [as N]DAILY MX report only all year
101Arsenic, total recoverableMO AVG report only all year
101Arsenic, total recoverableDAILY MX <= 85 ug/L all year
101Selenium, total recoverableMO AVG report only all year
101Selenium, total recoverableDAILY MX report only all year
101Cadmium, total recoverableMO AVG report only all year
101Cadmium, total recoverableDAILY MX <= 59 ug/L all year
101Lead, total recoverableMO AVG report only all year
101Lead, total recoverableDAILY MX <= 11 ug/L all year
101Chromium, total recoverableMO AVG report only all year
101Chromium, total recoverableDAILY MX <= 361 ug/L all year
101Copper, total recoverableMO AVG report only all year
101Copper, total recoverableDAILY MX <= 50 ug/L all year
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
101Solids, total dissolvedMO AVG report only all year
101Solids, total dissolvedDAILY MX report only all year
101Bromide [as Br]MO AVG report only all year
101Bromide [as Br]DAILY MX report only all year
101Mercury, total recoverableMO AVG report only Feb, Jun, Oct
101Mercury, total recoverableDAILY MX <= 50000 ng/L Feb, Jun, Oct
102Solids, total suspendedMO AVG <= 30 mg/L all year
102Solids, total suspendedDAILY MX <= 60 mg/L all year
102Flow, in conduit or thru treatment plantMO AVG report only all year
102Flow, in conduit or thru treatment plantDAILY MX report only all year
102Chlorine, total residualMO AVG report only Apr, May, Jun, Jul, Aug, Sep, Oct
102Chlorine, total residualDAILY MX report only Apr, May, Jun, Jul, Aug, Sep, Oct
102E. coli, colony forming units [CFU]MO GEO <= 125 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
102E. coli, colony forming units [CFU]DAILY MX <= 235 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
102BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
102BOD, carbonaceous [5 day, 20 C]DAILY MX <= 40 mg/L 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