IPL D/B/A AES INDIANA HARDING ST GEN. STA.

NPDES permit IN0004685 · Major NON-POTW · effective, expires 2028-12-31 · 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
28required values missing, on 14 form(s)
1of 92 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (182)

OutfallParameterStatisticLimitMonths
000Temperature, water deg. fahrenheitMO AVG report only all year
000Temperature, water deg. fahrenheitDAILY MX report only all year
000Temperature, water deg. fahrenheitMO AVG report only Jan
000Temperature, water deg. fahrenheitMO AVG report only Feb
000Temperature, water deg. fahrenheitMO AVG report only Mar
000Temperature, water deg. fahrenheitMO AVG report only Jun
000Temperature, water deg. fahrenheitMO AVG report only Jul
000Temperature, water deg. fahrenheitMO AVG report only Aug
000Temperature, water deg. fahrenheitMO AVG report only Dec
000Temperature, water deg. fahrenheitDAILY MX <= 61 deg F Jan
000Temperature, water deg. fahrenheitDAILY MX <= 63 deg F Feb
000Temperature, water deg. fahrenheitDAILY MX <= 71 deg F Mar
000Temperature, water deg. fahrenheitDAILY MX <= 93 deg F Jun
000Temperature, water deg. fahrenheitDAILY MX <= 95 deg F Jul
000Temperature, water deg. fahrenheitDAILY MX <= 95 deg F Aug
000Temperature, water deg. fahrenheitDAILY MX <= 71 deg F Dec
000Temperature, water deg. fahrenheitMO AVG report only Apr
000Temperature, water deg. fahrenheitDAILY MX <= 75 deg F Apr
000Temperature, water deg. fahrenheitMO AVG report only Apr
000Temperature, water deg. fahrenheitDAILY MX <= 78 deg F Apr
000Temperature, water deg. fahrenheitMO AVG report only May
000Temperature, water deg. fahrenheitDAILY MX <= 83 deg F May
000Temperature, water deg. fahrenheitMO AVG report only May
000Temperature, water deg. fahrenheitDAILY MX <= 93 deg F May
000Temperature, water deg. fahrenheitMO AVG report only Sep
000Temperature, water deg. fahrenheitDAILY MX <= 95 deg F Sep
000Temperature, water deg. fahrenheitMO AVG report only Sep
000Temperature, water deg. fahrenheitDAILY MX <= 93 deg F Sep
000Temperature, water deg. fahrenheitMO AVG report only Oct
000Temperature, water deg. fahrenheitDAILY MX <= 93 deg F Oct
000Temperature, water deg. fahrenheitMO AVG report only Oct
000Temperature, water deg. fahrenheitDAILY MX <= 87 deg F Oct
000Temperature, water deg. fahrenheitMO AVG report only Nov
000Temperature, water deg. fahrenheitDAILY MX <= 81 deg F Nov
000Temperature, water deg. fahrenheitMO AVG report only Nov
000Temperature, water deg. fahrenheitDAILY MX <= 78 deg F Nov
000StreamflowMO AVG report only all year
000StreamflowDAILY MX report only all year
000Flow, in conduit or thru treatment plantMO AVG report only all year
000Flow, in conduit or thru treatment plantDAILY MX report only all year
000Flow, in conduit or thru treatment plantMO AVG report only all year
000Flow, in conduit or thru treatment plantDAILY MX report only all year
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY 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
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
001Chlorination frequencyDAILY MX <= 4 occur/d all year
001Chlorination durationDAILY MX <= 40 min all year
001Flow, totalMO TOTAL report only all year
002Temperature, water deg. fahrenheitMO AVG report only all year
002Temperature, water deg. fahrenheitDAILY MX report only all year
002Chlorine, total residual [dsg. time]DAILY MX <= 120 min/d all year
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Oil and grease, hexane extr methodMO AVG report only all year
002Oil and grease, hexane extr methodDAILY MX report only all year
002Oxidants, total residualMO AVG < .06 mg/L all year
002Oxidants, total residualDAILY MX < .06 mg/L 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 residualDAILY MX <= .2 mg/L all year
002Chlorine, total residualMO AVG < .06 mg/L all year
002Chlorine, total residualDAILY MX < .06 mg/L all year
002Chlorination frequencyDAILY MX <= 4 occur/d all year
002Chlorination durationDAILY MX <= 40 min all year
002Flow, totalMO TOTAL report only all year
005Temperature, water deg. fahrenheitMO AVG report only all year
005Temperature, water deg. fahrenheitDAILY MX report only all year
005Chlorine, total residual [dsg. time]DAILY MX <= 120 min/d all year
005pHDAILY MN >= 6 SU all year
005pHDAILY MX <= 9 SU all year
005Solids, total suspendedMO AVG report only all year
005Solids, total suspendedDAILY MX report only all year
005Oil and grease, hexane extr methodMO AVG report only all year
005Oil and grease, hexane extr methodDAILY MX report only all year
005Oxidants, total residualMO AVG < .06 mg/L all year
005Oxidants, total residualDAILY MX < .06 mg/L all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Chlorine, total residualDAILY MX <= .2 mg/L all year
005Chlorine, total residualMO AVG < .06 mg/L all year
005Chlorine, total residualDAILY MX < .06 mg/L all year
005Chlorination frequencyDAILY MX <= 4 occur/d all year
005Chlorination durationDAILY MX <= 40 min all year
005Flow, totalMO TOTAL report only all year
006pHDAILY MN >= 6 SU all year
006pHDAILY MX <= 9 SU all year
006Solids, total suspendedMO AVG report only all year
006Solids, total suspendedDAILY MX report only all year
006Oil and grease, hexane extr methodMO AVG report only all year
006Oil and grease, hexane extr methodDAILY MX report only all year
006Iron, total recoverableMO AVG report only all year
006Iron, total recoverableDAILY MX report only all year
006Selenium, total recoverableMO AVG report only all year
006Selenium, total recoverableDAILY MX report only all year
006Zinc, total recoverableMO AVG report only all year
006Zinc, total recoverableDAILY MX report only all year
006Cadmium, total recoverableMO AVG report only all year
006Cadmium, total recoverableDAILY MX report only all year
006Chromium, total recoverableMO AVG report only all year
006Chromium, total recoverableDAILY MX report only all year
006Copper, total recoverableMO AVG report only all year
006Copper, total recoverableDAILY MX report only all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Chlorine, total residualMO AVG report only all year
006Chlorine, total residualDAILY MX report only all year
006Mercury, total recoverableMO AVG report only Feb, Apr, Jun, Aug, Oct, Dec
006Mercury, total recoverableDAILY MX report only Feb, Apr, Jun, Aug, Oct, Dec
006Flow, totalMO TOTAL report only all year
008Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 7.3 tox acute Feb, Aug
008Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 30.3 tox chronic Feb, Aug
008Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 7.3 tox acute Feb, Aug
008Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 30.3 tox chronic Feb, Aug
SW01pHDAILY MX report only Jun, Dec
SW01Solids, total suspendedDAILY MX report only Jun, Dec
SW01Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
SW01Sulfate, total [as SO4]DAILY MX report only Jun, Dec
SW01Selenium, total recoverableDAILY MX report only Jun, Dec
SW01Zinc, total recoverableDAILY MX report only Jun, Dec
SW01Copper, total recoverableDAILY MX report only Jun, Dec
SW01Chemical Oxygen Demand [COD]DAILY MX report only Jun, Dec
SW01Storm water flowDAILY MX report only Jun, Dec
SW04pHDAILY MX report only Jun, Dec
SW04Solids, total suspendedDAILY MX report only Jun, Dec
SW04Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
SW04Sulfate, total [as SO4]DAILY MX report only Jun, Dec
SW04Selenium, total recoverableDAILY MX report only Jun, Dec
SW04Zinc, total recoverableDAILY MX report only Jun, Dec
SW04Copper, total recoverableDAILY MX report only Jun, Dec
SW04Chemical Oxygen Demand [COD]DAILY MX report only Jun, Dec
SW04Storm water flowDAILY MX report only Jun, Dec
SW07pHDAILY MX report only Jun, Dec
SW07Solids, total suspendedDAILY MX report only Jun, Dec
SW07Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
SW07Sulfate, total [as SO4]DAILY MX report only Jun, Dec
SW07Selenium, total recoverableDAILY MX report only Jun, Dec
SW07Zinc, total recoverableDAILY MX report only Jun, Dec
SW07Copper, total recoverableDAILY MX report only Jun, Dec
SW07Chemical Oxygen Demand [COD]DAILY MX report only Jun, Dec
SW07Storm water flowDAILY MX report only Jun, Dec
SW08pHDAILY MX report only Jun, Dec
SW08Solids, total suspendedDAILY MX report only Jun, Dec
SW08Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
SW08Sulfate, total [as SO4]DAILY MX report only Jun, Dec
SW08Selenium, total recoverableDAILY MX report only Jun, Dec
SW08Zinc, total recoverableDAILY MX report only Jun, Dec
SW08Copper, total recoverableDAILY MX report only Jun, Dec
SW08Chemical Oxygen Demand [COD]DAILY MX report only Jun, Dec
SW08Storm water flowDAILY MX report only Jun, Dec
SW12pHDAILY MX report only Jun, Dec
SW12Solids, total suspendedDAILY MX report only Jun, Dec
SW12Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
SW12Sulfate, total [as SO4]DAILY MX report only Jun, Dec
SW12Selenium, total recoverableDAILY MX report only Jun, Dec
SW12Zinc, total recoverableDAILY MX report only Jun, Dec
SW12Copper, total recoverableDAILY MX report only Jun, Dec
SW12Chemical Oxygen Demand [COD]DAILY MX report only Jun, Dec
SW12Storm water flowDAILY MX report only Jun, Dec
SW14pHDAILY MX report only Jun, Dec
SW14Solids, total suspendedDAILY MX report only Jun, Dec
SW14Oil and grease, hexane extr methodDAILY MX report only Jun, Dec
SW14Sulfate, total [as SO4]DAILY MX report only Jun, Dec
SW14Selenium, total recoverableDAILY MX report only Jun, Dec
SW14Zinc, total recoverableDAILY MX report only Jun, Dec
SW14Copper, total recoverableDAILY MX report only Jun, Dec
SW14Chemical Oxygen Demand [COD]DAILY MX report only Jun, Dec
SW14Storm water flowDAILY MX report only Jun, Dec

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