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Washington, City of

Sewage treatment plant, major discharger, Washington, Illinois. NPDES permit IL0042412, in force until Oct 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (14 values), outfall A01 form 0 monthly (8 values), outfall B01 form 0 monthly (27 values), outfall B01 form P quarterly (41 values), outfall INF form L monthly (4 values), outfall INF form P quarterly (41 values), and 2 more forms
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 98 reports late

Limits in force (225)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)all year001
Oxygen, dissolved [DO]minimum weekly averagereport only (mg/L)all year001
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Chlorine, total residualdaily maximum≤ .75 mg/Lall year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Coliform, fecal generaldaily maximumreport only (#/100mL)all year002
Flowmonthly totalreport only (#/mo)all year002
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year003
Solids, total suspendeddaily maximumreport only (mg/L)all year003
Coliform, fecal generaldaily maximumreport only (#/100mL)all year003
Flowmonthly totalreport only (#/mo)all year003
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year004
Solids, total suspendeddaily maximumreport only (mg/L)all year004
Coliform, fecal generaldaily maximumreport only (#/100mL)all year004
Flowmonthly totalreport only (#/mo)all year004
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year005
Solids, total suspendeddaily maximumreport only (mg/L)all year005
Coliform, fecal generaldaily maximumreport only (#/100mL)all year005
Flowmonthly totalreport only (#/mo)all year005
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearA01
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all yearA01
Solids, total suspendedmonthly averagereport only (mg/L)all yearA01
Solids, total suspendedweekly averagereport only (mg/L)all yearA01
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearA01
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearA01
Coliform, fecal generaldaily maximum≤ 400 #/100mLall yearA01
Flow, totalmonthly totalreport only (Mgal/mo)all yearA01
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB01
Oxygen, dissolved [DO]minimum weekly average≥ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB01
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LMar–JulB01
Oxygen, dissolved [DO]daily minimum≥ 3.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB01
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar–JulB01
pHminimum≥ 6 SUall yearB01
pHmaximum≤ 9 SUall yearB01
Solids, total suspendedmonthly average≤ 12 mg/Lall yearB01
Solids, total suspendeddaily maximum≤ 24 mg/Lall yearB01
Solids, total suspendedmonthly average≤ 589 lb/dall yearB01
Solids, total suspendeddaily maximum≤ 1179 lb/dall yearB01
Oil & Greasedaily maximumreport only (mg/L)all yearB01
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearB01
Nitrogen, total [as N]daily maximumreport only (mg/L)all yearB01
Nitrogen, ammonia total [as N]monthly average≤ .5 mg/LMar, Apr, May, Sep, OctB01
Nitrogen, ammonia total [as N]monthly average≤ .5 mg/LJun–AugB01
Nitrogen, ammonia total [as N]monthly average≤ 3.3 mg/LJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]daily maximum≤ 1.3 mg/LMar, Apr, May, Sep, OctB01
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LJun–AugB01
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]monthly average≤ 27 lb/dMar, Apr, May, Sep, OctB01
Nitrogen, ammonia total [as N]monthly average≤ 27 lb/dJun–AugB01
Nitrogen, ammonia total [as N]monthly average≤ 165 lb/dJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]daily maximum≤ 69 lb/dMar, Apr, May, Sep, OctB01
Nitrogen, ammonia total [as N]daily maximum≤ 134 lb/dJun–AugB01
Nitrogen, ammonia total [as N]daily maximum≤ 194 lb/dJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]weekly average≤ 1.3 mg/LJun–AugB01
Nitrogen, ammonia total [as N]weekly average≤ 1.3 mg/LMar, Apr, May, Sep, OctB01
Nitrogen, ammonia total [as N]weekly average≤ 69 lb/dJun–AugB01
Nitrogen, ammonia total [as N]weekly average≤ 69 lb/dMar, Apr, May, Sep, OctB01
Phosphorus, total [as P]monthly average≤ 1 mg/Lall yearB01
Phosphorus, total [as P]monthly average≤ 53 lb/dall yearB01
Cyanide, total [as CN]daily maximumreport only (ug/L)all yearB01
Cyanide, free [amenable to chlorination]daily maximumreport only (ug/L)all yearB01
Fluoride, total [as F]daily maximumreport only (mg/L)all yearB01
Arsenic, total [as As]daily maximumreport only (mg/L)all yearB01
Barium, total [as Ba]daily maximumreport only (mg/L)all yearB01
Cadmium, total [as Cd]daily maximumreport only (mg/L)all yearB01
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all yearB01
Chromium, total [as Cr]daily maximumreport only (mg/L)all yearB01
Copper, total [as Cu]daily maximumreport only (mg/L)all yearB01
Iron, total [as Fe]daily maximumreport only (mg/L)all yearB01
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all yearB01
Lead, total [as Pb]daily maximumreport only (mg/L)all yearB01
Manganese, total [as Mn]daily maximumreport only (mg/L)all yearB01
Nickel, total [as Ni]daily maximumreport only (mg/L)all yearB01
Silver, total [as Ag]daily maximumreport only (mg/L)all yearB01
Zinc, total [as Zn]daily maximumreport only (mg/L)all yearB01
Selenium, total [as Se]daily maximumreport only (mg/L)all yearB01
Phenolics, total recoverabledaily maximumreport only (mg/L)all yearB01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearB01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearB01
Chlorine, total residualdaily maximum≤ .038 mg/LJan, Feb, Mar, Apr, Nov, DecB01
Chlorine, total residualdaily maximum≤ .038 mg/LMay–OctB01
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all yearB01
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/L)all yearB01
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/L)all yearB01
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/L)all yearB01
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/L)all yearB01
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/L)all yearB01
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)all yearB01
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/L)all yearB01
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/L)all yearB01
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/L)all yearB01
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/L)all yearB01
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/L)all yearB01
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/L)all yearB01
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/L)all yearB01
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/L)all yearB01
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/L)all yearB01
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all yearB01
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/L)all yearB01
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/L)all yearB01
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)all yearB01
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)all yearB01
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/L)all yearB01
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/L)all yearB01
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/L)all yearB01
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/L)all yearB01
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/L)all yearB01
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all yearB01
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/L)all yearB01
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/L)all yearB01
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/L)all yearB01
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/L)all yearB01
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/L)all yearB01
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/L)all yearB01
Mercury, total [as Hg]daily maximumreport only (ng/L)all yearB01
Coliform, fecal generaldaily maximum≤ 400 #/100mLMay–OctB01
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall yearB01
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/Lall yearB01
BOD, carbonaceous [5 day, 20 C]monthly average≤ 491 lb/dall yearB01
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 982 lb/dall yearB01
PFAS Sumdaily maximumreport only (ng/L)all yearB01
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/L)all yearB01
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/L)all yearB01
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/L)all yearB01
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/L)all yearB01
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/L)all yearB01
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/L)all yearB01
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/L)all yearB01
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/g)all yearBIO
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/g)all yearBIO
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/g)all yearBIO
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/g)all yearBIO
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/g)all yearBIO
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/g)all yearBIO
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/g)all yearBIO
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/g)all yearBIO
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/g)all yearBIO
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/g)all yearBIO
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/g)all yearBIO
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/g)all yearBIO
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/g)all yearBIO
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/g)all yearBIO
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/g)all yearBIO
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/g)all yearBIO
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/g)all yearBIO
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/g)all yearBIO
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/g)all yearBIO
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/g)all yearBIO
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/g)all yearBIO
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/g)all yearBIO
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/g)all yearBIO
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/g)all yearBIO
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/g)all yearBIO
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/g)all yearBIO
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/g)all yearBIO
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/g)all yearBIO
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/g)all yearBIO
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/g)all yearBIO
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/g)all yearBIO
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/g)all yearBIO
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/g)all yearBIO
PFAS Sumdaily maximumreport only (ng/g)all yearBIO
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/g)all yearBIO
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/g)all yearBIO
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/g)all yearBIO
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/g)all yearBIO
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/g)all yearBIO
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/g)all yearBIO
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/g)all yearBIO
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearINF
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearINF
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)all yearINF
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/L)all yearINF
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/L)all yearINF
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/L)all yearINF
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/L)all yearINF
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/L)all yearINF
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)all yearINF
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/L)all yearINF
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/L)all yearINF
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/L)all yearINF
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/L)all yearINF
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/L)all yearINF
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/L)all yearINF
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/L)all yearINF
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/L)all yearINF
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/L)all yearINF
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all yearINF
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/L)all yearINF
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/L)all yearINF
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)all yearINF
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)all yearINF
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/L)all yearINF
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/L)all yearINF
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/L)all yearINF
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/L)all yearINF
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/L)all yearINF
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all yearINF
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/L)all yearINF
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/L)all yearINF
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/L)all yearINF
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/L)all yearINF
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/L)all yearINF
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/L)all yearINF
PFAS Sumdaily maximumreport only (ng/L)all yearINF
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/L)all yearINF
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/L)all yearINF
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/L)all yearINF
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/L)all yearINF
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/L)all yearINF
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/L)all yearINF
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/L)all yearINF

How strict are these limits?

Cited limits by parameter: Illinois's rules and the federal ones.

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Your permit document is the final word. As JSON: /api/v1/permits/IL0042412 · MCP: https://passage-data.com/mcp