NIPSCO - R M SCHAHFER GEN STATION

NPDES permit IN0053201 · Major NON-POTW · administratively continued, expires 2025-09-30 · 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.

This permit expired on 2025-09-30 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

11values over a limit
0required values missing, on 0 form(s)
0of 106 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (7), E. coli, colony forming units [CFU] (3), Chlorine, total residual (1).

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 (338)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 15 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Oil and grease, hexane extr methodMO AVG <= 5 mg/L all year
001Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Chloride [as Cl]MO AVG report only all year
001Chloride [as Cl]DAILY MX report only all year
001Sulfate, total [as SO4]MO AVG <= 748 mg/L all year
001Sulfate, total [as SO4]DAILY MX <= 1501 mg/L all year
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableDAILY MX report only all year
001Boron, total recoverableMO AVG report only all year
001Boron, total recoverableDAILY MX report only all year
001Zinc, total recoverableMO AVG <= .301 mg/L all year
001Zinc, total recoverableDAILY MX <= .604 mg/L all year
001Chromium, total recoverableMO AVG <= .2 mg/L all year
001Chromium, total recoverableDAILY MX <= .2 mg/L all year
001Manganese, total recoverableMO AVG report only all year
001Manganese, total recoverableDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX <= 39 MGD 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
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
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
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedMO AVG <= 15 mg/L all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
002Oil and grease, hexane extr methodMO AVG <= 5 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
002Nitrite + Nitrate total [as N]MO AVG report only all year
002Nitrite + Nitrate 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 <= 748 mg/L all year
002Sulfate, total [as SO4]DAILY MX <= 1501 mg/L 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
002Boron, total recoverableMO AVG report only all year
002Boron, total recoverableDAILY MX report only all year
002Zinc, total recoverableMO AVG <= .301 mg/L all year
002Zinc, total recoverableDAILY MX <= .604 mg/L all year
002Chromium, total recoverableMO AVG <= .2 mg/L all year
002Chromium, total recoverableDAILY MX <= .2 mg/L all year
002Manganese, total recoverableMO AVG report only all year
002Manganese, 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 <= 39 MGD 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
002Mercury, total recoverableMO AVG <= 12 ng/L Feb, Apr, Jun, Aug, Oct, Dec
002Mercury, total recoverableDAILY MX <= 20 ng/L Feb, Apr, Jun, Aug, Oct, Dec
002Chlorination frequencyDAILY MX <= 4 occur/d all year
002Chlorination durationDAILY MX <= 40 min all year
002Flow, totalMO TOTAL report only all year
003pHDAILY MX report only Dec
003pHDAILY MX report only Dec
003Solids, total suspendedDAILY MX report only Dec
003Solids, total suspendedDAILY MX report only Dec
003Oil and grease, hexane extr methodDAILY MX report only Dec
003Oil and grease, hexane extr methodDAILY MX report only Dec
003Sulfate, total [as SO4]DAILY MX report only Dec
003Sulfate, total [as SO4]DAILY MX report only Dec
003Arsenic, total recoverableDAILY MX report only Dec
003Arsenic, total recoverableDAILY MX report only Dec
003Selenium, total recoverableDAILY MX report only Dec
003Selenium, total recoverableDAILY MX report only Dec
003Nickel, total recoverableDAILY MX report only Dec
003Nickel, total recoverableDAILY MX report only Dec
003Zinc, total recoverableDAILY MX report only Dec
003Zinc, total recoverableDAILY MX report only Dec
003Cadmium, total recoverableDAILY MX report only Dec
003Cadmium, total recoverableDAILY MX report only Dec
003Lead, total recoverableDAILY MX report only Dec
003Lead, total recoverableDAILY MX report only Dec
003Chromium, total recoverableDAILY MX report only Dec
003Chromium, total recoverableDAILY MX report only Dec
003Copper, total recoverableDAILY MX report only Dec
003Copper, total recoverableDAILY MX report only Dec
003Storm water flowET report only Dec
003Storm water flowET report only Dec
004pHDAILY MX report only Dec
004pHDAILY MX report only Dec
004Solids, total suspendedDAILY MX report only Dec
004Solids, total suspendedDAILY MX report only Dec
004Oil and grease, hexane extr methodDAILY MX report only Dec
004Oil and grease, hexane extr methodDAILY MX report only Dec
004Sulfate, total [as SO4]DAILY MX report only Dec
004Sulfate, total [as SO4]DAILY MX report only Dec
004Arsenic, total recoverableDAILY MX report only Dec
004Arsenic, total recoverableDAILY MX report only Dec
004Selenium, total recoverableDAILY MX report only Dec
004Selenium, total recoverableDAILY MX report only Dec
004Nickel, total recoverableDAILY MX report only Dec
004Nickel, total recoverableDAILY MX report only Dec
004Zinc, total recoverableDAILY MX report only Dec
004Zinc, total recoverableDAILY MX report only Dec
004Cadmium, total recoverableDAILY MX report only Dec
004Cadmium, total recoverableDAILY MX report only Dec
004Lead, total recoverableDAILY MX report only Dec
004Lead, total recoverableDAILY MX report only Dec
004Chromium, total recoverableDAILY MX report only Dec
004Chromium, total recoverableDAILY MX report only Dec
004Copper, total recoverableDAILY MX report only Dec
004Copper, total recoverableDAILY MX report only Dec
004Storm water flowET report only Dec
004Storm water flowET report only Dec
007pHDAILY MX report only Dec
007pHDAILY MX report only Dec
007Solids, total suspendedDAILY MX report only Dec
007Solids, total suspendedDAILY MX report only Dec
007Oil and grease, hexane extr methodDAILY MX report only Dec
007Oil and grease, hexane extr methodDAILY MX report only Dec
007Sulfate, total [as SO4]DAILY MX report only Dec
007Sulfate, total [as SO4]DAILY MX report only Dec
007Arsenic, total recoverableDAILY MX report only Dec
007Arsenic, total recoverableDAILY MX report only Dec
007Selenium, total recoverableDAILY MX report only Dec
007Selenium, total recoverableDAILY MX report only Dec
007Nickel, total recoverableDAILY MX report only Dec
007Nickel, total recoverableDAILY MX report only Dec
007Zinc, total recoverableDAILY MX report only Dec
007Zinc, total recoverableDAILY MX report only Dec
007Cadmium, total recoverableDAILY MX report only Dec
007Cadmium, total recoverableDAILY MX report only Dec
007Lead, total recoverableDAILY MX report only Dec
007Lead, total recoverableDAILY MX report only Dec
007Chromium, total recoverableDAILY MX report only Dec
007Chromium, total recoverableDAILY MX report only Dec
007Copper, total recoverableDAILY MX report only Dec
007Copper, total recoverableDAILY MX report only Dec
007Storm water flowET report only Dec
007Storm water flowET report only Dec
010pHDAILY MX report only Dec
010pHDAILY MX report only Dec
010Solids, total suspendedDAILY MX report only Dec
010Solids, total suspendedDAILY MX report only Dec
010Oil and grease, hexane extr methodDAILY MX report only Dec
010Oil and grease, hexane extr methodDAILY MX report only Dec
010Sulfate, total [as SO4]DAILY MX report only Dec
010Sulfate, total [as SO4]DAILY MX report only Dec
010Arsenic, total recoverableDAILY MX report only Dec
010Arsenic, total recoverableDAILY MX report only Dec
010Selenium, total recoverableDAILY MX report only Dec
010Selenium, total recoverableDAILY MX report only Dec
010Nickel, total recoverableDAILY MX report only Dec
010Nickel, total recoverableDAILY MX report only Dec
010Zinc, total recoverableDAILY MX report only Dec
010Zinc, total recoverableDAILY MX report only Dec
010Cadmium, total recoverableDAILY MX report only Dec
010Cadmium, total recoverableDAILY MX report only Dec
010Lead, total recoverableDAILY MX report only Dec
010Lead, total recoverableDAILY MX report only Dec
010Chromium, total recoverableDAILY MX report only Dec
010Chromium, total recoverableDAILY MX report only Dec
010Copper, total recoverableDAILY MX report only Dec
010Copper, total recoverableDAILY MX report only Dec
010Storm water flowET report only Dec
010Storm water flowET report only Dec
011pHDAILY MX report only Dec
011pHDAILY MX report only Dec
011Solids, total suspendedDAILY MX report only Dec
011Solids, total suspendedDAILY MX report only Dec
011Oil and grease, hexane extr methodDAILY MX report only Dec
011Oil and grease, hexane extr methodDAILY MX report only Dec
011Sulfate, total [as SO4]DAILY MX report only Dec
011Sulfate, total [as SO4]DAILY MX report only Dec
011Arsenic, total recoverableDAILY MX report only Dec
011Arsenic, total recoverableDAILY MX report only Dec
011Selenium, total recoverableDAILY MX report only Dec
011Selenium, total recoverableDAILY MX report only Dec
011Nickel, total recoverableDAILY MX report only Dec
011Nickel, total recoverableDAILY MX report only Dec
011Zinc, total recoverableDAILY MX report only Dec
011Zinc, total recoverableDAILY MX report only Dec
011Cadmium, total recoverableDAILY MX report only Dec
011Cadmium, total recoverableDAILY MX report only Dec
011Lead, total recoverableDAILY MX report only Dec
011Lead, total recoverableDAILY MX report only Dec
011Chromium, total recoverableDAILY MX report only Dec
011Chromium, total recoverableDAILY MX report only Dec
011Copper, total recoverableDAILY MX report only Dec
011Copper, total recoverableDAILY MX report only Dec
011Storm water flowET report only Dec
011Storm water flowET report only Dec
012pHDAILY MX report only Dec
012pHDAILY MX report only Dec
012Solids, total suspendedDAILY MX report only Dec
012Solids, total suspendedDAILY MX report only Dec
012Oil and grease, hexane extr methodDAILY MX report only Dec
012Oil and grease, hexane extr methodDAILY MX report only Dec
012Sulfate, total [as SO4]DAILY MX report only Dec
012Sulfate, total [as SO4]DAILY MX report only Dec
012Arsenic, total recoverableDAILY MX report only Dec
012Arsenic, total recoverableDAILY MX report only Dec
012Selenium, total recoverableDAILY MX report only Dec
012Selenium, total recoverableDAILY MX report only Dec
012Nickel, total recoverableDAILY MX report only Dec
012Nickel, total recoverableDAILY MX report only Dec
012Zinc, total recoverableDAILY MX report only Dec
012Zinc, total recoverableDAILY MX report only Dec
012Cadmium, total recoverableDAILY MX report only Dec
012Cadmium, total recoverableDAILY MX report only Dec
012Lead, total recoverableDAILY MX report only Dec
012Lead, total recoverableDAILY MX report only Dec
012Chromium, total recoverableDAILY MX report only Dec
012Chromium, total recoverableDAILY MX report only Dec
012Copper, total recoverableDAILY MX report only Dec
012Copper, total recoverableDAILY MX report only Dec
012Storm water flowET report only Dec
012Storm water flowET report only Dec
013pHDAILY MX report only Dec
013pHDAILY MX report only Dec
013Solids, total suspendedDAILY MX report only Dec
013Solids, total suspendedDAILY MX report only Dec
013Oil and grease, hexane extr methodDAILY MX report only Dec
013Oil and grease, hexane extr methodDAILY MX report only Dec
013Sulfate, total [as SO4]DAILY MX report only Dec
013Sulfate, total [as SO4]DAILY MX report only Dec
013Arsenic, total recoverableDAILY MX report only Dec
013Arsenic, total recoverableDAILY MX report only Dec
013Selenium, total recoverableDAILY MX report only Dec
013Selenium, total recoverableDAILY MX report only Dec
013Nickel, total recoverableDAILY MX report only Dec
013Nickel, total recoverableDAILY MX report only Dec
013Zinc, total recoverableDAILY MX report only Dec
013Zinc, total recoverableDAILY MX report only Dec
013Cadmium, total recoverableANNL MAX report only Dec
013Cadmium, total recoverableANNL MAX report only Dec
013Lead, total recoverableDAILY MX report only Dec
013Lead, total recoverableDAILY MX report only Dec
013Chromium, total recoverableDAILY MX report only Dec
013Chromium, total recoverableDAILY MX report only Dec
013Copper, total recoverableDAILY MX report only Dec
013Copper, total recoverableDAILY MX report only Dec
013Storm water flowET report only Dec
013Storm water flowET report only Dec
101Solids, total suspendedMO AVG <= 30 mg/L all year
101Solids, total suspendedDAILY MX <= 45 mg/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
101E. coli, colony forming units [CFU]GEO MEAN <= 125 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
101E. coli, colony forming units [CFU]DAILY MX <= 235 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
101BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
101BOD, carbonaceous [5 day, 20 C]DAILY MX <= 40 mg/L all year
201pHDAILY MN >= 6 SU all year
201pHDAILY MX <= 9 SU all year
201Solids, total suspendedMO AVG <= 30 mg/L all year
201Solids, total suspendedDAILY MX <= 100 mg/L all year
201Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
201Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
201Nitrogen, ammonia total [as N]MO AVG report only all year
201Nitrogen, ammonia total [as N]DAILY MX report only all year
201Nitrite + Nitrate total [as N]MO AVG report only all year
201Nitrite + Nitrate total [as N]DAILY MX report only all year
201Chloride [as Cl]MO AVG report only all year
201Chloride [as Cl]DAILY MX report only all year
201Arsenic, total recoverableMO AVG report only all year
201Arsenic, total recoverableDAILY MX report only all year
201Selenium, total recoverableMO AVG report only all year
201Selenium, total recoverableDAILY MX report only all year
201Boron, total recoverableMO AVG report only all year
201Boron, total recoverableDAILY MX report only all year
201Zinc, total recoverableMO AVG report only all year
201Zinc, total recoverableDAILY MX report only all year
201Manganese, total recoverableMO AVG report only all year
201Manganese, total recoverableDAILY MX report only all year
201Flow, in conduit or thru treatment plantMO AVG report only all year
201Flow, in conduit or thru treatment plantDAILY MX report only all year
201Mercury, total recoverableMO AVG report only Feb, Apr, Jun, Aug, Oct, Dec
201Mercury, total recoverableDAILY MX report only Feb, Apr, Jun, Aug, Oct, Dec
301pHDAILY MN >= 6 SU all year
301pHDAILY MX <= 9 SU all year
301Solids, total suspendedMO AVG <= 30 mg/L all year
301Solids, total suspendedDAILY MX <= 100 mg/L all year
301Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
301Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
301Nitrogen, ammonia total [as N]MO AVG report only all year
301Nitrogen, ammonia total [as N]DAILY MX report only all year
301Nitrite + Nitrate total [as N]MO AVG report only all year
301Nitrite + Nitrate total [as N]DAILY MX report only all year
301Chloride [as Cl]MO AVG report only all year
301Chloride [as Cl]DAILY MX report only all year
301Arsenic, total recoverableMO AVG report only all year
301Arsenic, total recoverableDAILY MX report only all year
301Selenium, total recoverableMO AVG report only all year
301Selenium, total recoverableDAILY MX report only all year
301Boron, total recoverableMO AVG report only all year
301Boron, total recoverableDAILY MX report only all year
301Zinc, total recoverableMO AVG report only all year
301Zinc, total recoverableDAILY MX report only all year
301Manganese, total recoverableMO AVG report only all year
301Manganese, total recoverableDAILY MX report only all year
301Flow, in conduit or thru treatment plantMO AVG report only all year
301Flow, in conduit or thru treatment plantDAILY MX report only all year
301Mercury, total recoverableMO AVG report only Feb, Apr, Jun, Aug, Oct, Dec
301Mercury, total recoverableDAILY MX report only Feb, Apr, Jun, Aug, Oct, Dec
U14Cycles Of ConcentrationMO AVG report only all year
U14Cycles Of ConcentrationDAILY MX report only all year
U14Cycles Of ConcentrationMO AVG report only all year
U14Cycles Of ConcentrationDAILY MX report only all year
U15Cycles Of ConcentrationMO AVG report only all year
U15Cycles Of ConcentrationDAILY MX report only all year
U15Cycles Of ConcentrationMO AVG report only all year
U15Cycles Of ConcentrationDAILY MX report only all year
U17Cycles Of ConcentrationMO AVG report only all year
U17Cycles Of ConcentrationDAILY MX report only all year
U17Cycles Of ConcentrationMO AVG report only all year
U17Cycles Of ConcentrationDAILY MX report only all year
U18Cycles Of ConcentrationMO AVG report only all year
U18Cycles Of ConcentrationDAILY MX report only all year
U18Cycles Of ConcentrationMO AVG report only all year
U18Cycles Of ConcentrationDAILY MX report only all year

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