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Stockton, Village of

Sewage treatment plant, Stockton, Illinois. NPDES permit IL0025267, in force until Sep 30, 2030. Last 12 months: no values over a limit, 18 required values missing, 3 of 41 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (46 values), outfall 001 form S twice a year (23 values), outfall BIO form S twice a year (18 values), outfall INF form L monthly (4 values), outfall INFL form S twice a year (23 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 36 reports late

Limits in force (154)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LMar–Jul001
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LMar–Jul001
Oxygen, dissolved [DO]daily minimum≥ 3.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]daily minimum≥ 3.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar–Jul001
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar–Jul001
pHminimum≥ 6 SUall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 12 mg/Lall year001
Solids, total suspendedmonthly average≤ 12 mg/Lall year001
Solids, total suspendeddaily maximum≤ 24 mg/Lall year001
Solids, total suspendeddaily maximum≤ 24 mg/Lall year001
Solids, total suspendedmonthly average≤ 128 lb/dall year001
Solids, total suspendedmonthly average≤ 128 lb/dall year001
Solids, total suspendeddaily maximum≤ 255 lb/dall year001
Solids, total suspendeddaily maximum≤ 255 lb/dall year001
Oil & Greasedaily maximumreport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LMar001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LMar001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 5.7 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 5.7 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/LJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/LJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 4.7 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 4.7 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 19 lb/dMar001
Nitrogen, ammonia total [as N]monthly average≤ 19 lb/dMar001
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 19 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 19 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 61 lb/dMar001
Nitrogen, ammonia total [as N]daily maximum≤ 61 lb/dMar001
Nitrogen, ammonia total [as N]daily maximum≤ 32 lb/dApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 32 lb/dApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 32 lb/dJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 32 lb/dJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 50 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 50 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/LMar001
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/LMar001
Nitrogen, ammonia total [as N]weekly average≤ 43 lb/dMar001
Nitrogen, ammonia total [as N]weekly average≤ 43 lb/dMar001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Cyanide, total [as CN]daily maximumreport only (ug/L)all year001
Cyanide, free [amenable to chlorination]daily maximumreport only (ug/L)all year001
Fluoride, total [as F]daily maximumreport only (mg/L)all year001
Arsenic, total [as As]daily maximumreport only (mg/L)all year001
Barium, total [as Ba]daily maximumreport only (mg/L)all year001
Beryllium, total [as Be]daily maximumreport only (mg/L)all year001
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year001
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year001
Chromium, total [as Cr]daily maximumreport only (mg/L)all year001
Copper, total [as Cu]daily maximumreport only (mg/L)all year001
Iron, total [as Fe]daily maximumreport only (mg/L)all year001
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year001
Lead, total [as Pb]daily maximumreport only (mg/L)all year001
Manganese, total [as Mn]daily maximumreport only (mg/L)all year001
Thallium, total [as Tl]daily maximumreport only (mg/L)all year001
Nickel, total [as Ni]daily maximumreport only (mg/L)all year001
Silver, total [as Ag]daily maximumreport only (mg/L)all year001
Zinc, total [as Zn]daily maximumreport only (mg/L)all year001
Antimony, total [as Sb]daily maximumreport only (mg/L)all year001
Selenium, total [as Se]daily maximumreport only (mg/L)all year001
Phenolics, total recoverabledaily maximumreport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualdaily maximum≤ .05 mg/Lall year001
Chlorine, total residualdaily maximum≤ .05 mg/Lall year001
Mercury, total [as Hg]daily maximumreport only (ng/L)all year001
Coliform, fecal generaldaily maximumreport only (#/100mL)May–Oct001
Coliform, fecal generaldaily maximumreport only (#/100mL)May–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 106 lb/dall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 106 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 213 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 213 lb/dall year001
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
Cyanide, total [as CN]daily maximumreport only (ug/L)all yearBIO
Arsenic, total [as As]daily maximumreport only (mg/L)all yearBIO
Barium, total [as Ba]daily maximumreport only (mg/L)all yearBIO
Beryllium, total [as Be]daily maximumreport only (mg/L)all yearBIO
Cadmium, total [as Cd]daily maximumreport only (mg/L)all yearBIO
Chromium, total [as Cr]daily maximumreport only (mg/L)all yearBIO
Copper, total [as Cu]daily maximumreport only (mg/L)all yearBIO
Iron, total [as Fe]daily maximumreport only (mg/L)all yearBIO
Lead, total [as Pb]daily maximumreport only (mg/L)all yearBIO
Manganese, total [as Mn]daily maximumreport only (mg/L)all yearBIO
Thallium, total [as Tl]daily maximumreport only (mg/L)all yearBIO
Nickel, total [as Ni]daily maximumreport only (mg/L)all yearBIO
Silver, total [as Ag]daily maximumreport only (mg/L)all yearBIO
Zinc, total [as Zn]daily maximumreport only (mg/L)all yearBIO
Antimony, total [as Sb]daily maximumreport only (mg/L)all yearBIO
Selenium, total [as Se]daily maximumreport only (mg/L)all yearBIO
Phenolics, total recoverabledaily maximumreport only (mg/L)all yearBIO
Mercury, total [as Hg]daily maximumreport only (ng/L)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
Oil & Greasedaily maximumreport only (mg/L)all yearINFL
Cyanide, total [as CN]daily maximumreport only (ug/L)all yearINFL
Cyanide, free [amenable to chlorination]daily maximumreport only (ug/L)all yearINFL
Fluoride, total [as F]daily maximumreport only (mg/L)all yearINFL
Arsenic, total [as As]daily maximumreport only (mg/L)all yearINFL
Barium, total [as Ba]daily maximumreport only (mg/L)all yearINFL
Beryllium, total [as Be]daily maximumreport only (mg/L)all yearINFL
Cadmium, total [as Cd]daily maximumreport only (mg/L)all yearINFL
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all yearINFL
Chromium, total [as Cr]daily maximumreport only (mg/L)all yearINFL
Copper, total [as Cu]daily maximumreport only (mg/L)all yearINFL
Iron, total [as Fe]daily maximumreport only (mg/L)all yearINFL
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all yearINFL
Lead, total [as Pb]daily maximumreport only (mg/L)all yearINFL
Manganese, total [as Mn]daily maximumreport only (mg/L)all yearINFL
Thallium, total [as Tl]daily maximumreport only (mg/L)all yearINFL
Nickel, total [as Ni]daily maximumreport only (mg/L)all yearINFL
Silver, total [as Ag]daily maximumreport only (mg/L)all yearINFL
Zinc, total [as Zn]daily maximumreport only (mg/L)all yearINFL
Antimony, total [as Sb]daily maximumreport only (mg/L)all yearINFL
Selenium, total [as Se]daily maximumreport only (mg/L)all yearINFL
Phenolics, total recoverabledaily maximumreport only (mg/L)all yearINFL
Mercury, total [as Hg]daily maximumreport only (ng/L)all yearINFL

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0025267 · MCP: https://passage-data.com/mcp