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Tilton, Village of

Sewage treatment plant, Tilton, Illinois. NPDES permit IL0031429, in force until Aug 31, 2031. 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 (24 values), outfall 003 form 0 monthly (12 values), outfall INF form L monthly (4 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 (54)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimum≥ 6 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 4.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 6.25 mg/LMar–Jul001
Oxygen, dissolved [DO]daily minimum≥ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar–Jul001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 500 lb/dall year001
Solids, total suspendedweekly average≤ 751 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 6.9 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 5.7 mg/LJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 6.3 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 17 lb/dJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 30 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 67 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 115 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 95 lb/dJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 105 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 4.6 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]weekly average≤ 2.5 mg/LJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 77 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]weekly average≤ 42 lb/dJun–Aug001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmonthly average≤ .15 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Chlorine, total residualmonthly average≤ .15 mg/LMay–Oct001
Chlorine, total residualdaily maximum≤ .3 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Chlorine, total residualdaily maximum≤ .3 mg/LMay–Oct001
Coliform, fecal generaldaily maximum≤ 400 #/100mLMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 417 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 667 lb/dall year001
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)all year003
Oxygen, dissolved [DO]minimum weekly averagereport only (mg/L)all year003
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year003
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year003
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year003
pHminimum≥ 6 SUall year003
pHmaximum≤ 9 SUall year003
Solids, total suspendedmonthly average≤ 30 mg/Lall year003
Solids, total suspendedweekly average≤ 45 mg/Lall year003
Chlorine, total residualdaily maximum≤ .75 mg/Lall year003
Coliform, fecal generaldaily maximumreport only (#/100mL)all year003
Flow, totalmonthly totalreport only (Mgal/mo)all year003
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

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0031429 · MCP: https://passage-data.com/mcp