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Plants facing new discharge limits — by state and pollutant

In Indiana: 31 plants hold a permit with a new or tighter discharge limit already written into it, taking effect between Dec 1, 2026 and May 31, 2031 (208 limits); 10 of them reported a median above that limit between Oct 1, 2025 and Sep 30, 2026. EPA's file of Oct 16, 2026.

By state: all · IA 204 · PA 172 · LA 165 · OH 134 · MS 68 · AR 58 · TX 57 · MI 53 · GA 52 · VA 52 · MD 48 · NJ 35 · IN 31 · SC 23 · KS 21 · MN 21 · NY 21 · MO 20 · WV 17 · OR 16 · IL 14 · FL 10 · NE 9 · OK 8 · TN 8 · CO 7 · UT 7 · NM 6 · CA 5 · SD 5 · CT 3 · ID 3 · ME 2 · WI 2 · AL 1 · DC 1 · KY 1 · MT 1 · NH 1 · PR 1 · VT 1 · WA 1

By pollutant: Toxicity [acute], Ceriodaphnia dubia 8 · Toxicity [acute], Pimephales promelas [Fathead Minnow] 8 · Toxicity [chronic], Ceriodaphnia dubia 8 · Toxicity [chronic], Pimephales promelas [Fathead Minnow] 7 · Nitrogen, ammonia total [as N] 6 · Phosphorus, total [as P] 6 · Selenium, total recoverable 5 · Zinc, total recoverable 5 · Cyanide, free [as free] 4 · Lead, total recoverable 3 · Cadmium, total recoverable 2 · Chloride [as Cl] 2 · Nickel, total recoverable 2 · Silver total recoverable 2 · Solids, total suspended 2 · Arsenic, total recoverable 1 · BOD, carbonaceous [5 day, 20 C] 1 · Boron, total recoverable 1 · Bromide [as Br] 1 · Copper, total recoverable 1 · Cyanide, total recoverable 1 · E. coli, colony forming units [CFU] 1 · Fluoride, total [as F] 1 · Manganese, total recoverable 1 · Mercury, total recoverable 1

PlantPermitStateTypeDesign flowParameterNew limitEffectiveToday's median× limit
WESTPORT WWTPIN0024830INSewage plant.43 MGDNitrogen, ammonia total [as N]monthly average 3.2 mg/L (Jan, Feb, Mar, Apr, Dec), tighterDec 1, 20269.023 mg/L (3 values)2.82×
WESTPORT WWTPIN0024830INSewage plant.43 MGDNitrogen, ammonia total [as N]maximum weekly average 4.8 mg/L (Jan, Feb, Mar, Apr, Dec), tighterDec 1, 202611.4 mg/L (3 values)2.38×
WESTPORT WWTPIN0024830INSewage plant.43 MGDNitrogen, ammonia total [as N]monthly average 1.6 mg/L (May–Nov), tighterDec 1, 20263.645 mg/L (4 values)2.28×
WESTPORT WWTPIN0024830INSewage plant.43 MGDNitrogen, ammonia total [as N]maximum weekly average 2.4 mg/L (May–Nov), tighterDec 1, 20264.065 mg/L (4 values)1.69×
GREENFIELD WWTPIN0020109INSewage plant, major8 MGDCyanide, free [as free]monthly average 0.0043 mg/L, newJan 1, 20270.005 mg/L (11 values, 1 below detection)1.16×
COUNTRY COURT UTILITIY WWTPIN0045292INIndustrial.064 MGDPhosphorus, total [as P]monthly average 1 mg/L, newJul 1, 20272.9 mg/L (11 values)2.9×
PLAINFIELD SOUTH WWTP, TOWN OFIN0062456INSewage plant, major4 MGDChloride [as Cl]monthly average 360 mg/L, tighterFeb 1, 2028370 mg/L (11 values)1.03×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDSelenium, total recoverablemonthly average 0.0031 mg/L, tighterJun 1, 20280.0065 mg/L (11 values)2.1×
CARRIAGE HOUSE ESTATES MHPIN0051861INIndustrial.01 MGDPhosphorus, total [as P]monthly average 1 mg/L, newJun 1, 20282.06 mg/L (11 values)2.06×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDSelenium, total recoverablemonthly average 0.0031 mg/L, tighterJun 1, 20280.0045 mg/L (11 values)1.45×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDSelenium, total recoverabledaily maximum 0.0075 mg/L, tighterJun 1, 20280.01 mg/L (11 values)1.33×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDBoron, total recoverablemonthly average 7.3 mg/L, newJun 1, 20289.32 mg/L (11 values)1.28×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDBoron, total recoverabledaily maximum 13 mg/L, newJun 1, 202813.2 mg/L (11 values)1.02×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDTemperature, water deg. fahrenheitdaily maximum 93 deg F (Jun–Sep), newJun 1, 202895 deg F (3 values)1.02×
WOLCOTT MUNICIPAL WWTPIN0040797INSewage plant.63 MGDPhosphorus, total [as P]monthly average 1 mg/L, newSep 1, 20282.58 mg/L (11 values)2.58×
DUKE ENERGY INDIANA CAYUGA GENERATING STATIONIN0002763INIndustrial, major—Bromide [as Br]daily maximum 0.2 mg/L, newJan 1, 202931 mg/L (10 values)155×
DUKE ENERGY INDIANA CAYUGA GENERATING STATIONIN0002763INIndustrial, major—Solids, total dissolvedmonthly average 149 mg/L, newJan 1, 202919300 mg/L (11 values)130×
DUKE ENERGY INDIANA CAYUGA GENERATING STATIONIN0002763INIndustrial, major—Nitrite + Nitrate total [as N]monthly average 1.2 mg/L, newJan 1, 202991 mg/L (11 values)75.8×
DUKE ENERGY INDIANA CAYUGA GENERATING STATIONIN0002763INIndustrial, major—Solids, total dissolveddaily maximum 306 mg/L, newJan 1, 202920600 mg/L (11 values)67.3×
DUKE ENERGY INDIANA CAYUGA GENERATING STATIONIN0002763INIndustrial, major—Nitrite + Nitrate total [as N]daily maximum 2 mg/L, newJan 1, 2029110 mg/L (11 values)55×
DUKE ENERGY INDIANA CAYUGA GENERATING STATIONIN0002763INIndustrial, major—Selenium, total recoverabledaily maximum 10 ug/L, newJan 1, 2029210 ug/L (11 values)21×
DUKE ENERGY INDIANA CAYUGA GENERATING STATIONIN0002763INIndustrial, major—Mercury, total recoverabledaily maximum 23 ng/L (Feb, Jun, Oct), tighterJan 1, 2029160 ng/L (3 values)6.96×
INDIANAPOLIS BELMONT & SOUTHPORT AWTPIN0023183INSewage plant, major125 MGDSelenium, total recoverablemonthly average 0.0031 mg/L, newMay 1, 20290.0049 mg/L (11 values)1.58×
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—Selenium, total recoverablemonthly average 0.0031 mg/L, tighterOct 1, 20290.0225 mg/L (5 values, 2 below detection)7.26×
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—Selenium, total recoverabledaily maximum 0.0075 mg/L, tighterOct 1, 20290.0225 mg/L (5 values, 2 below detection)3×
GREENFIELD WWTPIN0020109INSewage plant, major8 MGDCyanide, free [as free]daily maximum 0.0085 mg/L, newJan 1, 20270.005 mg/L (11 values)0.588×
GREENFIELD WWTPIN0020109INSewage plant, major8 MGDCadmium, total recoverablemonthly average 0.0016 mg/L, newJan 1, 20270.00005 mg/L (11 values)0.0312×
GREENFIELD WWTPIN0020109INSewage plant, major8 MGDCadmium, total recoverabledaily maximum 0.0032 mg/L, newJan 1, 20270.00005 mg/L (11 values)0.0156×
GREENFIELD WWTPIN0020109INSewage plant, major8 MGDLead, total recoverablemonthly average 0.011 mg/L, newJan 1, 20270.000104 mg/L (11 values)0.00945×
GREENFIELD WWTPIN0020109INSewage plant, major8 MGDLead, total recoverabledaily maximum 0.022 mg/L, newJan 1, 20270.00012 mg/L (11 values)0.00545×
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—TU Static 48Hr Acute Daphnia magnamaximum 1 tox acute (Jan–Mar), newJan 1, 2027under 3 values—
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—TU Static 48Hr Acute Daphnia pulexmaximum 1 tox acute (Jan–Mar), newJan 1, 2027under 3 values—
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—Toxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (Jan–Mar), newJan 1, 2027under 3 values—
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox acute (Jan–Mar), newJan 1, 2027under 3 values—
SULLIVAN MUNICIPAL WWTPIN0024554INSewage plant, major2.1 MGDCyanide, total recoverabledaily maximum 0.009 mg/L, newJan 1, 20270.0067 mg/L (5 values, 3 below detection)—
SULLIVAN MUNICIPAL WWTPIN0024554INSewage plant, major2.1 MGDCyanide, total recoverablemonthly average 0.004 mg/L, newJan 1, 20270.003 mg/L (5 values, 3 below detection)—
SUNMAN WWTPIN0021679INSewage plant.225 MGDPhosphorus, total [as P]monthly average 1 mL/L, newJan 1, 20272200 mL/L (11 values)check the permit
CLEVELAND-CLIFFS STEEL LLC - INDIANA HARBOR WESTIN0000205INIndustrial, major—Velocity of intakeHX 0.5 ft/sec, newFeb 1, 2027under 3 values—
PAOLI MUNICIPAL WWTPIN0024023INSewage plant, major.8 MGDToxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (Aug), newMar 1, 2027under 3 values—
PAOLI MUNICIPAL WWTPIN0024023INSewage plant, major.8 MGDToxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox acute (Aug), newMar 1, 2027under 3 values—
PAOLI MUNICIPAL WWTPIN0024023INSewage plant, major.8 MGDToxicity [chronic], Ceriodaphnia dubiamaximum 1 tox chronic (Aug), newMar 1, 2027under 3 values—
PAOLI MUNICIPAL WWTPIN0024023INSewage plant, major.8 MGDToxicity [chronic], Pimephales promelas [Fathead Minnow]maximum 1 tox chronic (Aug), newMar 1, 2027under 3 values—
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—TU Static 48Hr Acute Daphnia magnamaximum 1 tox acute (Mar, Sep), newApr 1, 2027under 3 values—
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—TU Static 48Hr Acute Daphnia pulexmaximum 1 tox acute (Mar, Sep), newApr 1, 2027under 3 values—
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—Toxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (Mar, Sep), newApr 1, 2027under 3 values—
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox acute (Mar, Sep), newApr 1, 2027under 3 values—
PAOLI MUNICIPAL WWTPIN0024023INSewage plant, major.8 MGDToxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (Sep), newApr 1, 2027under 3 values—
PAOLI MUNICIPAL WWTPIN0024023INSewage plant, major.8 MGDToxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox acute (Sep), newApr 1, 2027under 3 values—
PAOLI MUNICIPAL WWTPIN0024023INSewage plant, major.8 MGDToxicity [chronic], Ceriodaphnia dubiamaximum 1 tox chronic (Sep), newApr 1, 2027under 3 values—
PAOLI MUNICIPAL WWTPIN0024023INSewage plant, major.8 MGDToxicity [chronic], Pimephales promelas [Fathead Minnow]maximum 1 tox chronic (Sep), newApr 1, 2027under 3 values—
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—TU Static 48Hr Acute Daphnia magnamaximum 1 tox acute (Apr, Oct), newMay 1, 2027under 3 values—
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—TU Static 48Hr Acute Daphnia pulexmaximum 1 tox acute (Apr, Oct), newMay 1, 2027under 3 values—
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—Toxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (Apr, Oct), newMay 1, 2027under 3 values—
AMERICAN ELECTRIC POWER, ROCKPORT PLANTIN0051845INIndustrial, major—Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox acute (Apr, Oct), newMay 1, 2027under 3 values—
ALBION WWTPIN0022144INSewage plant.34 MGDSilver total recoverablemonthly average 0.00048 lb/d, newJun 1, 20270.0003216 lb/d (10 values)0.67×
ALBION WWTPIN0022144INSewage plant.34 MGDSilver total recoverablemonthly average 0.00017 mg/L, newJun 1, 20270.0001075 mg/L (10 values, 4 below detection)0.632×
ALBION WWTPIN0022144INSewage plant.34 MGDSilver total recoverabledaily maximum 0.00094 lb/d, newJun 1, 20270.0004861 lb/d (10 values)0.517×
ALBION WWTPIN0022144INSewage plant.34 MGDSilver total recoverabledaily maximum 0.00033 mg/L, newJun 1, 20270.00013 mg/L (10 values, 4 below detection)0.394×
ALBION WWTPIN0022144INSewage plant.34 MGDCyanide, free [as free]monthly average 0.015 mg/L, newJun 1, 20270.002648 mg/L (10 values)0.177×
ALBION WWTPIN0022144INSewage plant.34 MGDCyanide, free [as free]monthly average 0.043 lb/d, newJun 1, 20270.006428 lb/d (10 values)0.149×
ALBION WWTPIN0022144INSewage plant.34 MGDCyanide, free [as free]daily maximum 0.03 mg/L, newJun 1, 20270.00435 mg/L (10 values, 1 below detection)0.145×
ALBION WWTPIN0022144INSewage plant.34 MGDCyanide, free [as free]daily maximum 0.085 lb/d, newJun 1, 20270.01189 lb/d (10 values)0.14×
ALBION WWTPIN0022144INSewage plant.34 MGDLead, total recoverablemonthly average 0.034 mg/L, newJun 1, 20270.0003642 mg/L (10 values, 1 below detection)0.0107×
ALBION WWTPIN0022144INSewage plant.34 MGDLead, total recoverabledaily maximum 0.068 mg/L, newJun 1, 20270.00053 mg/L (10 values, 2 below detection)0.00779×
ALBION WWTPIN0022144INSewage plant.34 MGDLead, total recoverablemonthly average 0.1 lb/d, newJun 1, 20270.0007516 lb/d (10 values)0.00752×
ALBION WWTPIN0022144INSewage plant.34 MGDLead, total recoverabledaily maximum 0.19 lb/d, newJun 1, 20270.001413 lb/d (10 values)0.00743×
CROTHERSVILLE WWTPIN0022683INSewage plant.47 MGDPhosphorus, total [as P]monthly average 1 mg/L, newNov 1, 20270.96 mg/L (11 values)0.96×
KOUTS MUNICIPAL WWTPIN0023400INSewage plant.33 MGDZinc, total recoverablemonthly average 0.34 mg/L, newNov 1, 20270.0725 mg/L (10 values)0.213×
KOUTS MUNICIPAL WWTPIN0023400INSewage plant.33 MGDZinc, total recoverabledaily maximum 0.67 mg/L, newNov 1, 20270.069 mg/L (10 values)0.103×
CROTHERSVILLE WWTPIN0022683INSewage plant.47 MGDZinc, total recoverabledaily maximum 0.29 mg/L, newNov 1, 20270.027 mg/L (11 values)0.0931×
CROTHERSVILLE WWTPIN0022683INSewage plant.47 MGDZinc, total recoverablemonthly average 0.14 mg/L, newNov 1, 2027under 3 values—
PLAINFIELD SOUTH WWTP, TOWN OFIN0062456INSewage plant, major4 MGDChloride [as Cl]daily maximum 720 mg/L, tighterFeb 1, 2028390 mg/L (11 values)0.542×
SANTA CLAUS WWTP, TOWN OFIN0020605INSewage plant, major1.17 MGDToxicity [chronic], Ceriodaphnia dubiamaximum 1 tox chronic (Sep), tighterApr 1, 2028under 3 values—
SANTA CLAUS WWTP, TOWN OFIN0020605INSewage plant, major1.17 MGDToxicity [chronic], Pimephales promelas [Fathead Minnow]maximum 1 tox chronic (Sep), tighterApr 1, 2028under 3 values—
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDNitrogen, ammonia total [as N]monthly average 3.2 mg/L (Jan, Feb, Mar, Apr, Dec), newJun 1, 20282.37 mg/L (5 values)0.741×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDSelenium, total recoverabledaily maximum 0.0075 mg/L, tighterJun 1, 20280.005 mg/L (11 values)0.667×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDCyanide, free [as free]monthly average 0.0049 mg/L, newJun 1, 20280.003 mg/L (11 values)0.612×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDCyanide, free [as free]monthly average 0.0049 mg/L, newJun 1, 20280.003 mg/L (11 values)0.612×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDBoron, total recoverablemonthly average 7.3 mg/L, tighterJun 1, 20283.57 mg/L (11 values)0.489×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDFluoride, total [as F]monthly average 1.9 mg/L, newJun 1, 20280.91 mg/L (11 values)0.479×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDSulfate, total [as SO4]daily maximum 2500 mg/L, tighterJun 1, 2028976 mg/L (11 values)0.39×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDNitrogen, ammonia total [as N]daily maximum 7.7 mg/L (Jan, Feb, Mar, Apr, Dec), newJun 1, 20282.73 mg/L (5 values)0.355×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDCyanide, free [as free]daily maximum 0.0085 mg/L, newJun 1, 20280.003 mg/L (11 values)0.353×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDCyanide, free [as free]daily maximum 0.0085 mg/L, newJun 1, 20280.003 mg/L (11 values)0.353×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDFluoride, total [as F]daily maximum 3.3 mg/L, newJun 1, 20281.09 mg/L (11 values)0.33×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDBoron, total recoverabledaily maximum 13 mg/L, tighterJun 1, 20284.21 mg/L (11 values)0.324×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDFluoride, total [as F]monthly average 1.9 mg/L, newJun 1, 20280.47 mg/L (11 values)0.247×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDNitrogen, ammonia total [as N]monthly average 1.6 mg/L (May–Nov), newJun 1, 20280.325 mg/L (6 values)0.203×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDChloride [as Cl]monthly average 320 mg/L, newJun 1, 202861.8 mg/L (11 values)0.193×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDNitrogen, ammonia total [as N]monthly average 1.6 mg/L (May–Nov), newJun 1, 20280.25 mg/L (6 values)0.156×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDChloride [as Cl]daily maximum 550 mg/L, newJun 1, 202884.7 mg/L (11 values)0.154×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDNitrogen, ammonia total [as N]monthly average 3.2 mg/L (Jan, Feb, Mar, Apr, Dec), newJun 1, 20280.49 mg/L (5 values)0.153×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDFluoride, total [as F]daily maximum 3.3 mg/L, newJun 1, 20280.49 mg/L (11 values)0.148×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDCadmium, total recoverablemonthly average 0.0015 mg/L, tighterJun 1, 20280.0002 mg/L (11 values)0.133×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDNitrogen, ammonia total [as N]daily maximum 3.9 mg/L (May–Nov), newJun 1, 20280.395 mg/L (6 values)0.101×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDZinc, total recoverablemonthly average 0.23 mg/L, newJun 1, 20280.02 mg/L (11 values)0.087×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDCadmium, total recoverabledaily maximum 0.0025 mg/L, tighterJun 1, 20280.0002 mg/L (11 values)0.08×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDNitrogen, ammonia total [as N]daily maximum 7.7 mg/L (Jan, Feb, Mar, Apr, Dec), newJun 1, 20280.55 mg/L (5 values)0.0714×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDCadmium, total recoverablemonthly average 0.0015 mg/L, tighterJun 1, 20280.0001 mg/L (11 values)0.0667×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDNitrogen, ammonia total [as N]daily maximum 3.9 mg/L (May–Nov), newJun 1, 20280.25 mg/L (6 values)0.0641×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDManganese, total recoverablemonthly average 3.9 mg/L, newJun 1, 20280.247 mg/L (11 values)0.0633×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDZinc, total recoverabledaily maximum 0.4 mg/L, newJun 1, 20280.02 mg/L (11 values)0.05×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDCopper, total recoverablemonthly average 0.023 mg/L, newJun 1, 20280.001 mg/L (11 values)0.0435×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDCadmium, total recoverabledaily maximum 0.0025 mg/L, tighterJun 1, 20280.0001 mg/L (11 values)0.04×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDManganese, total recoverabledaily maximum 6.7 mg/L, newJun 1, 20280.254 mg/L (11 values)0.0379×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDCopper, total recoverabledaily maximum 0.04 mg/L, newJun 1, 20280.001 mg/L (11 values)0.025×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDNickel, total recoverablemonthly average 0.1 mg/L, newJun 1, 20280.002 mg/L (11 values)0.02×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDNickel, total recoverabledaily maximum 0.17 mg/L, newJun 1, 20280.002 mg/L (11 values)0.0118×
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDTemperature, water deg. fahrenheitdaily maximum 63 deg F (Mar), newJun 1, 2028under 3 values—
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDTemperature, water deg. fahrenheitdaily maximum 83 deg F (May), newJun 1, 2028under 3 values—
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDTemperature, water deg. fahrenheitdaily maximum 81 deg F (Oct), newJun 1, 2028under 3 values—
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDTemperature, water deg. fahrenheitdaily maximum 73 deg F (Apr, Nov), newJun 1, 2028under 3 values—
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDTemperature, water deg. fahrenheitdaily maximum 53 deg F (Jan, Feb), newJun 1, 2028under 3 values—
IPALCO - PETERSBURG GEN STATIONIN0002887INIndustrial, major340 MGDTemperature, water deg. fahrenheitdaily maximum 60 deg F (Dec), newJun 1, 2028under 3 values—
PORTAGE WATER RECLAMATION FACILITYIN0024368INSewage plant, major5.3 MGDCyanide, free [as free]daily maximum 0.0104 mg/L, newSep 1, 20280.002 mg/L (11 values)0.192×
PORTAGE WATER RECLAMATION FACILITYIN0024368INSewage plant, major5.3 MGDCyanide, free [as free]daily maximum 0.46 lb/d, newSep 1, 20280.052 lb/d (11 values)0.113×
HENDRICKS COUNTY RSDIN0057614INSewage plant, major3 MGDToxicity [acute], Ceriodaphnia dubiadaily maximum 1 tox acute, newSep 1, 2028under 3 values—
HENDRICKS COUNTY RSDIN0057614INSewage plant, major3 MGDToxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum 1 tox acute, newSep 1, 2028under 3 values—
HENDRICKS COUNTY RSDIN0057614INSewage plant, major3 MGDToxicity [chronic], Ceriodaphnia dubiadaily maximum 1 tox chronic, newSep 1, 2028under 3 values—
HENDRICKS COUNTY RSDIN0057614INSewage plant, major3 MGDToxicity [chronic], Pimephales promelas [Fathead Minnow]daily maximum 1 tox chronic, newSep 1, 2028under 3 values—
PORTAGE WATER RECLAMATION FACILITYIN0024368INSewage plant, major5.3 MGDCyanide, free [as free]monthly average 0.23 lb/d, newSep 1, 2028under 3 values—
PORTAGE WATER RECLAMATION FACILITYIN0024368INSewage plant, major5.3 MGDCyanide, free [as free]monthly average 0.0052 mg/L, newSep 1, 2028under 3 values—
DUKE ENERGY INDIANA CAYUGA GENERATING STATIONIN0002763INIndustrial, major—Zinc, total recoverabledaily maximum 0.43 mg/L, newNov 1, 20280.149 mg/L (9 values)0.347×
DUKE ENERGY INDIANA CAYUGA GENERATING STATIONIN0002763INIndustrial, major—Arsenic, total recoverabledaily maximum 5 ug/L, tighterJan 1, 20294.03 ug/L (11 values, 1 below detection)0.806×
SHELBYVILLE WWTP, CITY OFIN0032867INSewage plant, major8 MGDLead, total recoverablemonthly average 0.03 mg/L, newApr 1, 20290.0006 mg/L (5 values)0.02×
SHELBYVILLE WWTP, CITY OFIN0032867INSewage plant, major8 MGDLead, total recoverabledaily maximum 0.06 mg/L, newApr 1, 20290.0007 mg/L (7 values)0.0117×
INDIANAPOLIS BELMONT & SOUTHPORT AWTPIN0023183INSewage plant, major125 MGDSelenium, total recoverabledaily maximum 0.0075 mg/L, newMay 1, 20290.0071 mg/L (11 values)0.947×
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSelenium, total recoverabledaily maximum 0.0075 mg/L, newJul 1, 2029under 3 values—
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSelenium, total recoverabledaily maximum 0.31 lb/d, newJul 1, 2029under 3 values—
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSelenium, total recoverablemonthly average 0.13 lb/d, newJul 1, 2029under 3 values—
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSelenium, total recoverablemonthly average 0.0031 mg/L, newJul 1, 2029under 3 values—
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSilver total recoverabledaily maximum 0.015 lb/d, newJul 1, 20290.1335 lb/d (5 values, 5 below detection)—
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSilver total recoverabledaily maximum 0.00036 mg/L, newJul 1, 20290.004 mg/L (5 values, 5 below detection)—
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSilver total recoverablemonthly average 0.00018 mg/L, newJul 1, 2029under 3 values—
GOSHEN WWTPIN0025755INSewage plant, major5 MGDSilver total recoverablemonthly average 0.0074 lb/d, newJul 1, 2029under 3 values—
NEW CASTLE WWTPIN0023914INSewage plant, major10 MGDNickel, total recoverabledaily maximum 0.3 mg/L, newAug 1, 20290.0055 mg/L (4 values)0.0183×
NEW CASTLE WWTPIN0023914INSewage plant, major10 MGDZinc, total recoverabledaily maximum 0.67 mg/L, newAug 1, 20290.00815 mg/L (4 values)0.0122×
LAOTTO REGIONAL SEWER DISTRICTIN0058611INSewage plant.05 MGDNitrogen, ammonia total [as N]daily maximum 10 mg/L (May–Nov), newAug 1, 2029under 3 values—
LAOTTO REGIONAL SEWER DISTRICTIN0058611INSewage plant.05 MGDNitrogen, ammonia total [as N]daily maximum 11 mg/L (Jan, Feb, Mar, Apr, Dec), newAug 1, 2029under 3 values—
LAOTTO REGIONAL SEWER DISTRICTIN0058611INSewage plant.05 MGDNitrogen, ammonia total [as N]monthly average 5 mg/L (May–Nov), newAug 1, 2029under 3 values—
LAOTTO REGIONAL SEWER DISTRICTIN0058611INSewage plant.05 MGDNitrogen, ammonia total [as N]monthly average 5.3 mg/L (Jan, Feb, Mar, Apr, Dec), newAug 1, 2029under 3 values—
NEW CASTLE WWTPIN0023914INSewage plant, major10 MGDNickel, total recoverablemonthly average 0.15 mg/L, newAug 1, 2029under 3 values—
NEW CASTLE WWTPIN0023914INSewage plant, major10 MGDZinc, total recoverablemonthly average 0.34 mg/L, newAug 1, 2029under 3 values—
BROWNSBURG WWTPIN0021245INSewage plant, major5.25 MGDToxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (Mar), newOct 1, 2029under 3 values—
BROWNSBURG WWTPIN0021245INSewage plant, major5.25 MGDToxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox chronic (Mar), newOct 1, 2029under 3 values—
BROWNSBURG WWTPIN0021245INSewage plant, major5.25 MGDToxicity [chronic], Ceriodaphnia dubiamaximum 1 tox chronic (Mar), newOct 1, 2029under 3 values—
BROWNSBURG WWTPIN0021245INSewage plant, major5.25 MGDToxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (Apr), newNov 1, 2029under 3 values—
BROWNSBURG WWTPIN0021245INSewage plant, major5.25 MGDToxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox acute (Apr), newNov 1, 2029under 3 values—
BROWNSBURG WWTPIN0021245INSewage plant, major5.25 MGDToxicity [chronic], Ceriodaphnia dubiamaximum 1 tox chronic (Apr), newNov 1, 2029under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDToxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (May), newDec 1, 2029under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDToxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox acute (May), newDec 1, 2029under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDToxicity [chronic], Ceriodaphnia dubiamaximum 1.1 tox chronic (May), newDec 1, 2029under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDToxicity [chronic], Pimephales promelas [Fathead Minnow]maximum 1.1 tox chronic (May), newDec 1, 2029under 3 values—
LOWELL WASTEWATER TREATMENT PLANTIN0023621INSewage plant, major4 MGDToxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (Jun), newJan 1, 2030under 3 values—
LOWELL WASTEWATER TREATMENT PLANTIN0023621INSewage plant, major4 MGDToxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox acute (Jun), newJan 1, 2030under 3 values—
LOWELL WASTEWATER TREATMENT PLANTIN0023621INSewage plant, major4 MGDToxicity [chronic], Ceriodaphnia dubiamaximum 1.1 tox chronic (Jun), newJan 1, 2030under 3 values—
LOWELL WASTEWATER TREATMENT PLANTIN0023621INSewage plant, major4 MGDToxicity [chronic], Pimephales promelas [Fathead Minnow]maximum 1.1 tox chronic (Jun), newJan 1, 2030under 3 values—
WINFIELD WWTPIN0058343INSewage plant, major1.6 MGDToxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (Jun), newJan 1, 2030under 3 values—
WINFIELD WWTPIN0058343INSewage plant, major1.6 MGDToxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox acute (Jun), newJan 1, 2030under 3 values—
WINFIELD WWTPIN0058343INSewage plant, major1.6 MGDToxicity [chronic], Ceriodaphnia dubiamaximum 1 tox chronic (Jun), newJan 1, 2030under 3 values—
WINFIELD WWTPIN0058343INSewage plant, major1.6 MGDToxicity [chronic], Pimephales promelas [Fathead Minnow]maximum 1 tox chronic (Jun), newJan 1, 2030under 3 values—
LOWELL WASTEWATER TREATMENT PLANTIN0023621INSewage plant, major4 MGDToxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (Jul), newFeb 1, 2030under 3 values—
LOWELL WASTEWATER TREATMENT PLANTIN0023621INSewage plant, major4 MGDToxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox acute (Jul), newFeb 1, 2030under 3 values—
LOWELL WASTEWATER TREATMENT PLANTIN0023621INSewage plant, major4 MGDToxicity [chronic], Ceriodaphnia dubiamaximum 1.1 tox chronic (Jul), newFeb 1, 2030under 3 values—
LOWELL WASTEWATER TREATMENT PLANTIN0023621INSewage plant, major4 MGDToxicity [chronic], Pimephales promelas [Fathead Minnow]maximum 1.1 tox chronic (Jul), newFeb 1, 2030under 3 values—
ROCKPORT NORTH WWTPIN0061662INSewage plant.3 MGDToxicity [acute], Ceriodaphnia dubiamaximum 1 tox acute (Sep), newApr 1, 2030under 3 values—
ROCKPORT NORTH WWTPIN0061662INSewage plant.3 MGDToxicity [acute], Pimephales promelas [Fathead Minnow]maximum 1 tox acute (Sep), newApr 1, 2030under 3 values—
ROCKPORT NORTH WWTPIN0061662INSewage plant.3 MGDToxicity [chronic], Ceriodaphnia dubiamaximum 1 tox chronic (Sep), newApr 1, 2030under 3 values—
ROCKPORT NORTH WWTPIN0061662INSewage plant.3 MGDToxicity [chronic], Pimephales promelas [Fathead Minnow]maximum 1 tox chronic (Sep), newApr 1, 2030under 3 values—
HELMSBURG REGIONAL SEWER DISTRICTIN0058416INSewage plant.025 MGDNitrogen, ammonia total [as N]monthly average 0.14 lb/d (May–Nov), tighterOct 1, 20300.0175 lb/d (6 values)0.125×
HELMSBURG REGIONAL SEWER DISTRICTIN0058416INSewage plant.025 MGDNitrogen, ammonia total [as N]monthly average 1.1 mg/L (May–Nov), tighterOct 1, 20300.1 mg/L (6 values)0.0909×
HELMSBURG REGIONAL SEWER DISTRICTIN0058416INSewage plant.025 MGDNitrogen, ammonia total [as N]monthly average 1.6 mg/L (Jan, Feb, Mar, Apr, Dec), tighterOct 1, 20300.1 mg/L (5 values)0.0625×
HELMSBURG REGIONAL SEWER DISTRICTIN0058416INSewage plant.025 MGDNitrogen, ammonia total [as N]monthly average 0.2 lb/d (Jan, Feb, Mar, Apr, Dec), tighterOct 1, 20300.005 lb/d (5 values)0.025×
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDBOD, carbonaceous [5 day, 20 C]monthly average 20 mg/L (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDBOD, carbonaceous [5 day, 20 C]monthly average 170 lb/d (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDBOD, carbonaceous [5 day, 20 C]monthly average 210 lb/d (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDBOD, carbonaceous [5 day, 20 C]monthly average 25 mg/L (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDBOD, carbonaceous [5 day, 20 C]weekly average 30 mg/L (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDBOD, carbonaceous [5 day, 20 C]weekly average 250 lb/d (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDBOD, carbonaceous [5 day, 20 C]weekly average 330 lb/d (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDBOD, carbonaceous [5 day, 20 C]weekly average 40 mg/L (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDE. coli, colony forming units [CFU]daily maximum 235 CFU/100mL (Apr–Oct), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDE. coli, colony forming units [CFU]monthly geometric mean 125 CFU/100mL (Apr–Oct), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDNitrogen, ammonia total [as N]monthly average 8.3 lb/d (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDNitrogen, ammonia total [as N]monthly average 1 mg/L (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDNitrogen, ammonia total [as N]monthly average 1.6 mg/L (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDNitrogen, ammonia total [as N]monthly average 13 lb/d (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDNitrogen, ammonia total [as N]maximum weekly average 13 lb/d (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDNitrogen, ammonia total [as N]maximum weekly average 1.5 mg/L (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDNitrogen, ammonia total [as N]maximum weekly average 2.4 mg/L (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDNitrogen, ammonia total [as N]maximum weekly average 20 lb/d (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDPhosphorus, total [as P]monthly average 1 mg/L, newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDSolids, total suspendedmonthly average 24 mg/L (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDSolids, total suspendedmonthly average 200 lb/d (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDSolids, total suspendedmonthly average 250 lb/d (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDSolids, total suspendedmonthly average 30 mg/L (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDSolids, total suspendedweekly average 36 mg/L (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDSolids, total suspendedweekly average 300 lb/d (May–Nov), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDSolids, total suspendedweekly average 45 mg/L (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDSolids, total suspendedweekly average 380 lb/d (Jan, Feb, Mar, Apr, Dec), newOct 1, 2030under 3 values—
FLORA MUNICIPAL WWTPIN0020141INSewage plant.428 MGDpHdaily maximum 9 SU, newOct 1, 2030under 3 values—
HELMSBURG REGIONAL SEWER DISTRICTIN0058416INSewage plant.025 MGDNitrogen, ammonia total [as N]weekly average 0.2 lb/d (May–Nov), tighterOct 1, 2030under 3 values—
HELMSBURG REGIONAL SEWER DISTRICTIN0058416INSewage plant.025 MGDNitrogen, ammonia total [as N]weekly average 0.3 lb/d (Jan, Feb, Mar, Apr, Dec), tighterOct 1, 2030under 3 values—
CLAYPOOL WWTPIN0039870INSewage plant.0336 MGDSolids, total suspendedmonthly average 30 mg/L, tighterMay 31, 203128 mg/L (5 values)0.933×
CLAYPOOL WWTPIN0039870INSewage plant.0336 MGDNitrogen, ammonia total [as N]monthly average 4.2 mg/L (May–Nov), tighterMay 31, 20310.845 mg/L (3 values)0.201×
CLAYPOOL WWTPIN0039870INSewage plant.0336 MGDNitrogen, ammonia total [as N]monthly average 8.1 mg/L (Jan, Feb, Mar, Apr, Dec), tighterMay 31, 2031under 3 values—
CLAYPOOL WWTPIN0039870INSewage plant.0336 MGDNitrogen, ammonia total [as N]weekly average 6.3 mg/L (May–Nov), tighterMay 31, 2031under 3 values—
CLAYPOOL WWTPIN0039870INSewage plant.0336 MGDSolids, total suspendedweekly average 45 mg/L, tighterMay 31, 2031under 3 values—

Each limit is one EPA's ICIS-NPDES file holds on the permit's current version with a begin date after today, enforceable and numeric, either on a parameter the outfall was never limited on (new) or lower than the limit in force (tighter). Today's median is the plant's own reported values for the same outfall, statistic and unit between Oct 1, 2025 and Sep 30, 2026, with how many; none is shown where most were below a detection limit. Read the permit before relying on a value.

Sell to these plants? The list for your states every week, with every plant over a limit on your pollutant, as a spreadsheet, by API and by email when a new one appears: ask for the plant list, or write to info@passage-data.com. What a seller gets.

For programs and AI agents: a state's permits with these limits as JSON at /api/v1/permits?state=IN&upcoming=true, narrowed with &facility_type=potw or &min_flow_mgd=1; the whole list at /dmr/data/upcoming.json; or add https://passage-data.com/mcp as a remote MCP server (tool list_permits). Free, no key. llms.txt

From EPA's ECHO data, not the permit document itself: your permit is the final word. All states