TROY, CITY OF

NPDES permit IL0031488 · Major POTW · effective, expires 2030-12-31 · 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
0required values missing, on 0 form(s)
0of 54 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among IL permits in EPA's filings — check your permit).

Limits in force (226)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO AV MN report only all year
001Oxygen, dissolved [DO]MN WK AV report only all year
001Oxygen, dissolved [DO]DAILY MN report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Chlorine, total residualMO AVG <= .75 mg/L all year
001Flow, totalMO TOTAL report only all year
A01BOD, 5-day, 20 deg. CMO AVG report only all year
A01pHMINIMUM >= 6 SU all year
A01pHMAXIMUM <= 9 SU all year
A01Solids, total suspendedMO AVG report only all year
A01Nitrogen, ammonia total [as N]MO AVG report only all year
A01Flow, totalMO TOTAL report only all year
B01Oxygen, dissolved [DO]MO AV MN >= 5.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
B01Oxygen, dissolved [DO]MN WK AV >= 4 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
B01Oxygen, dissolved [DO]MN WK AV >= 6 mg/L Mar, Apr, May, Jun, Jul
B01Oxygen, dissolved [DO]DAILY MN >= 3.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
B01Oxygen, dissolved [DO]DAILY MN >= 5 mg/L Mar, Apr, May, Jun, Jul
B01pHMINIMUM >= 6 SU all year
B01pHMAXIMUM <= 9 SU all year
B01Solids, total suspendedMO AVG <= 12 mg/L all year
B01Solids, total suspendedDAILY MX <= 24 mg/L all year
B01Solids, total suspendedMO AVG <= 391 lb/d all year
B01Solids, total suspendedDAILY MX <= 781 lb/d all year
B01Oil & GreaseDAILY MX report only all year
B01Oil & GreaseDAILY MX report only all year
B01Nitrogen, total [as N]DAILY MX report only all year
B01Nitrogen, ammonia total [as N]MO AVG <= 2 mg/L Mar, Apr, May, Sep, Oct
B01Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Jun, Jul, Aug
B01Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Jan, Feb, Nov, Dec
B01Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Mar, Apr, May, Sep, Oct
B01Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Jun, Jul, Aug
B01Nitrogen, ammonia total [as N]DAILY MX <= 8 mg/L Jan, Feb, Nov, Dec
B01Nitrogen, ammonia total [as N]MO AVG <= 65 lb/d Mar, Apr, May, Sep, Oct
B01Nitrogen, ammonia total [as N]MO AVG <= 49 lb/d Jun, Jul, Aug
B01Nitrogen, ammonia total [as N]MO AVG <= 130 lb/d Jan, Feb, Nov, Dec
B01Nitrogen, ammonia total [as N]DAILY MX <= 260 lb/d Mar, Apr, May, Sep, Oct
B01Nitrogen, ammonia total [as N]DAILY MX <= 98 lb/d Jun, Jul, Aug
B01Nitrogen, ammonia total [as N]DAILY MX <= 260 lb/d Jan, Feb, Nov, Dec
B01Nitrogen, ammonia total [as N]WKLY AVG <= 5 mg/L Mar, Apr, May, Sep, Oct
B01Nitrogen, ammonia total [as N]WKLY AVG <= 163 lb/d Mar, Apr, May, Sep, Oct
B01Phosphorus, total [as P]DAILY MX report only all year
B01Cyanide, total [as CN]DAILY MX report only all year
B01Cyanide, total [as CN]DAILY MX report only all year
B01Cyanide, free [amenable to chlorination]DAILY MX report only all year
B01Cyanide, free [amenable to chlorination]DAILY MX report only all year
B01Fluoride, total [as F]DAILY MX report only all year
B01Fluoride, total [as F]DAILY MX report only all year
B01Arsenic, total [as As]DAILY MX report only all year
B01Arsenic, total [as As]DAILY MX report only all year
B01Barium, total [as Ba]DAILY MX report only all year
B01Barium, total [as Ba]DAILY MX report only all year
B01Cadmium, total [as Cd]DAILY MX report only all year
B01Cadmium, total [as Cd]DAILY MX report only all year
B01Chromium, hexavalent [as Cr]DAILY MX report only all year
B01Chromium, hexavalent [as Cr]DAILY MX report only all year
B01Chromium, total [as Cr]DAILY MX report only all year
B01Chromium, total [as Cr]DAILY MX report only all year
B01Copper, total [as Cu]MO AVG <= .0328 mg/L all year
B01Copper, total [as Cu]DAILY MX <= .0523 mg/L all year
B01Copper, total [as Cu]DAILY MX report only all year
B01Copper, total [as Cu]DAILY MX report only all year
B01Copper, total [as Cu]MO AVG <= 1.1 lb/d all year
B01Copper, total [as Cu]DAILY MX <= 1.7 lb/d all year
B01Iron, total [as Fe]DAILY MX report only all year
B01Iron, total [as Fe]DAILY MX report only all year
B01Iron, dissolved [as Fe]DAILY MX report only all year
B01Iron, dissolved [as Fe]DAILY MX report only all year
B01Lead, total [as Pb]DAILY MX report only all year
B01Lead, total [as Pb]DAILY MX report only all year
B01Manganese, total [as Mn]DAILY MX report only all year
B01Manganese, total [as Mn]DAILY MX report only all year
B01Nickel, total [as Ni]DAILY MX report only all year
B01Nickel, total [as Ni]DAILY MX report only all year
B01Silver, total [as Ag]DAILY MX report only all year
B01Silver, total [as Ag]DAILY MX report only all year
B01Zinc, total [as Zn]DAILY MX report only all year
B01Zinc, total [as Zn]DAILY MX report only all year
B01Selenium, total [as Se]DAILY MX report only all year
B01Selenium, total [as Se]DAILY MX report only all year
B01Phenolics, total recoverableDAILY MX report only all year
B01Phenolics, total recoverableDAILY MX report only all year
B01Flow, in conduit or thru treatment plantMO AVG report only all year
B01Flow, in conduit or thru treatment plantDAILY MX report only all year
B01Chlorine, total residualDAILY MX <= .038 mg/L Jan, Feb, Mar, Apr, Nov, Dec
B01Chlorine, total residualDAILY MX <= .038 mg/L May, Jun, Jul, Aug, Sep, Oct
B01Perfluorooctanoic acid (PFOA)DAILY MX report only all year
B01Perfluorobutanoic acid (PFBA)DAILY MX report only all year
B01Perfluorooctanesulfonamide (PFOSA)DAILY MX report only all year
B01Perfluoropentanoic acid (PFPeA)DAILY MX report only all year
B01Perfluorohexanoic acid (PFHxA)DAILY MX report only all year
B01Perfluoroheptanoic acid (PFHpA)DAILY MX report only all year
B01Perfluorononanoic acid (PFNA)DAILY MX report only all year
B01Perfluorodecanoic acid (PFDA)DAILY MX report only all year
B01Perfluoroundecanoic acid (PFUnA)DAILY MX report only all year
B01Perfluorododecanoic acid (PFDoA)DAILY MX report only all year
B01Perfluorotridecanoic acid (PFTrDA)DAILY MX report only all year
B01Perfluorotetradecanoic acid (PFTeDA)DAILY MX report only all year
B01N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)DAILY MX report only all year
B01N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)DAILY MX report only all year
B01N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)DAILY MX report only all year
B01N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)DAILY MX report only all year
B01Perfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
B01Perfluorodecanesulfonic acid (PFDS)DAILY MX report only all year
B01Perfluoroheptanesulfonic acid (PFHpS)DAILY MX report only all year
B01Perfluorohexanesulfonic acid (PFHxS)DAILY MX report only all year
B01Perfluorooctanesulfonic acid (PFOS)DAILY MX report only all year
B011H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)DAILY MX report only all year
B011H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)DAILY MX report only all year
B011H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)DAILY MX report only all year
B01Perfluoropentanesulfonic acid (PFPeS)DAILY MX report only all year
B01Perfluorononanesulfonic acid (PFNS)DAILY MX report only all year
B01Hexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
B01Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)DAILY MX report only all year
B01Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)DAILY MX report only all year
B01Perfluorododecanesulfonic acid (PFDoS)DAILY MX report only all year
B014,8-Dioxa-3H-perfluorononanoic acid (ADONA)DAILY MX report only all year
B01N-methyl perfluorooctanesulfonamide (NMeFOSA)DAILY MX report only all year
B01N-ethyl perfluorooctanesulfonamide (NEtFOSA)DAILY MX report only all year
B01Mercury, total [as Hg]DAILY MX report only all year
B01Mercury, total [as Hg]DAILY MX report only all year
B01Coliform, fecal generalDAILY MX <= 400 #/100mL May, Jun, Jul, Aug, Sep, Oct
B01BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
B01BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L all year
B01BOD, carbonaceous [5 day, 20 C]MO AVG <= 325 lb/d all year
B01BOD, carbonaceous [5 day, 20 C]DAILY MX <= 651 lb/d all year
B01PFAS SumDAILY MX report only all year
B013-Perfluoropropyl propanoic acid (3:3 FTCA)DAILY MX report only all year
B01Perfluoro-3-methoxypropanoic acid (PFMPA)DAILY MX report only all year
B019-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)DAILY MX report only all year
B0111-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)DAILY MX report only all year
B013-Perfluoroheptyl propanoic acid (7:3 FTCA)DAILY MX report only all year
B01Perfluoro-4-methoxybutanoic acid (PFMBA)DAILY MX report only all year
B012H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)DAILY MX report only all year
BIOPerfluorooctanoic acid (PFOA)DAILY MX report only all year
BIOPerfluorobutanoic acid (PFBA)DAILY MX report only all year
BIOPerfluorooctanesulfonamide (PFOSA)DAILY MX report only all year
BIOPerfluoropentanoic acid (PFPeA)DAILY MX report only all year
BIOPerfluorohexanoic acid (PFHxA)DAILY MX report only all year
BIOPerfluoroheptanoic acid (PFHpA)DAILY MX report only all year
BIOPerfluorononanoic acid (PFNA)DAILY MX report only all year
BIOPerfluorodecanoic acid (PFDA)DAILY MX report only all year
BIOPerfluoroundecanoic acid (PFUnA)DAILY MX report only all year
BIOPerfluorododecanoic acid (PFDoA)DAILY MX report only all year
BIOPerfluorotridecanoic acid (PFTrDA)DAILY MX report only all year
BIOPerfluorotetradecanoic acid (PFTeDA)DAILY MX report only all year
BION-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)DAILY MX report only all year
BION-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)DAILY MX report only all year
BION-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)DAILY MX report only all year
BION-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)DAILY MX report only all year
BIOPerfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
BIOPerfluorodecanesulfonic acid (PFDS)DAILY MX report only all year
BIOPerfluoroheptanesulfonic acid (PFHpS)DAILY MX report only all year
BIOPerfluorohexanesulfonic acid (PFHxS)DAILY MX report only all year
BIOPerfluorooctanesulfonic acid (PFOS)DAILY MX report only all year
BIO1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)DAILY MX report only all year
BIO1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)DAILY MX report only all year
BIO1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)DAILY MX report only all year
BIOPerfluoropentanesulfonic acid (PFPeS)DAILY MX report only all year
BIOPerfluorononanesulfonic acid (PFNS)DAILY MX report only all year
BIOHexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
BIONonafluoro-3,6-dioxaheptanoic acid (NFDHA)DAILY MX report only all year
BIOPerfluoro(2-ethoxyethane)sulfonic acid (PFEESA)DAILY MX report only all year
BIOPerfluorododecanesulfonic acid (PFDoS)DAILY MX report only all year
BIO4,8-Dioxa-3H-perfluorononanoic acid (ADONA)DAILY MX report only all year
BION-methyl perfluorooctanesulfonamide (NMeFOSA)DAILY MX report only all year
BION-ethyl perfluorooctanesulfonamide (NEtFOSA)DAILY MX report only all year
BIOPFAS SumDAILY MX report only all year
BIO3-Perfluoropropyl propanoic acid (3:3 FTCA)DAILY MX report only all year
BIOPerfluoro-3-methoxypropanoic acid (PFMPA)DAILY MX report only all year
BIO9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)DAILY MX report only all year
BIO11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)DAILY MX report only all year
BIO3-Perfluoroheptyl propanoic acid (7:3 FTCA)DAILY MX report only all year
BIOPerfluoro-4-methoxybutanoic acid (PFMBA)DAILY MX report only all year
BIO2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)DAILY MX report only all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFSolids, total suspendedMO AVG report only all year
INFFlow, in conduit or thru treatment plantMO AVG report only all year
INFFlow, in conduit or thru treatment plantDAILY MX report only all year
INFPerfluorooctanoic acid (PFOA)DAILY MX report only all year
INFPerfluorobutanoic acid (PFBA)DAILY MX report only all year
INFPerfluorooctanesulfonamide (PFOSA)DAILY MX report only all year
INFPerfluoropentanoic acid (PFPeA)DAILY MX report only all year
INFPerfluorohexanoic acid (PFHxA)DAILY MX report only all year
INFPerfluoroheptanoic acid (PFHpA)DAILY MX report only all year
INFPerfluorononanoic acid (PFNA)DAILY MX report only all year
INFPerfluorodecanoic acid (PFDA)DAILY MX report only all year
INFPerfluoroundecanoic acid (PFUnA)DAILY MX report only all year
INFPerfluorododecanoic acid (PFDoA)DAILY MX report only all year
INFPerfluorotridecanoic acid (PFTrDA)DAILY MX report only all year
INFPerfluorotetradecanoic acid (PFTeDA)DAILY MX report only all year
INFN-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)DAILY MX report only all year
INFN-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)DAILY MX report only all year
INFN-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)DAILY MX report only all year
INFN-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)DAILY MX report only all year
INFPerfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
INFPerfluorodecanesulfonic acid (PFDS)DAILY MX report only all year
INFPerfluoroheptanesulfonic acid (PFHpS)DAILY MX report only all year
INFPerfluorohexanesulfonic acid (PFHxS)DAILY MX report only all year
INFPerfluorooctanesulfonic acid (PFOS)DAILY MX report only all year
INF1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)DAILY MX report only all year
INF1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)DAILY MX report only all year
INF1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)DAILY MX report only all year
INFPerfluoropentanesulfonic acid (PFPeS)DAILY MX report only all year
INFPerfluorononanesulfonic acid (PFNS)DAILY MX report only all year
INFHexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
INFNonafluoro-3,6-dioxaheptanoic acid (NFDHA)DAILY MX report only all year
INFPerfluoro(2-ethoxyethane)sulfonic acid (PFEESA)DAILY MX report only all year
INFPerfluorododecanesulfonic acid (PFDoS)DAILY MX report only all year
INF4,8-Dioxa-3H-perfluorononanoic acid (ADONA)DAILY MX report only all year
INFN-methyl perfluorooctanesulfonamide (NMeFOSA)DAILY MX report only all year
INFN-ethyl perfluorooctanesulfonamide (NEtFOSA)DAILY MX report only all year
INFPFAS SumDAILY MX report only all year
INF3-Perfluoropropyl propanoic acid (3:3 FTCA)DAILY MX report only all year
INFPerfluoro-3-methoxypropanoic acid (PFMPA)DAILY MX report only all year
INF9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)DAILY MX report only all year
INF11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)DAILY MX report only all year
INF3-Perfluoroheptyl propanoic acid (7:3 FTCA)DAILY MX report only all year
INFPerfluoro-4-methoxybutanoic acid (PFMBA)DAILY MX report only all year
INF2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)DAILY MX report only all year

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