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Westville - Belgium Sanitary District

Sewage treatment plant, Belgium, Illinois. NPDES permit IL0031721, in force until Oct 31, 2030. Last 12 months: over a limit 2 times (last June 2026), 1 of 61 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (10 values), outfall A01 form 0 monthly (8 values), outfall B01 form 0 monthly (16 values), outfall C01 form 0 monthly (23 values), outfall INF form L monthly (4 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 60 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
October 2025C01Nitrogen, ammonia total [as N], monthly average1.79 mg/L≤ 1.5 mg/L19%
June 2026A01Coliform, fecal general, daily maximumT≤ 400 #/100mL—

Limits in force (85)

ParameterStatisticLimitMonthsOutfall
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
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Chlorine, total residualmonthly average≤ .75 mg/Lall year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearA01
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearA01
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearA01
pHminimum≥ 6 SUall yearA01
pHmaximum≤ 9 SUall yearA01
Solids, total suspendedmonthly averagereport only (mg/L)all yearA01
Solids, total suspendeddaily maximumreport only (mg/L)all yearA01
Solids, total suspendeddaily maximumreport only (mg/L)all yearA01
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearA01
Chlorine, total residualmonthly average≤ .75 mg/Lall yearA01
Coliform, fecal generaldaily maximum≤ 400 #/100mLall yearA01
Coliform, fecal generaldaily maximumreport only (#/100mL)all yearA01
Coliform, fecal generaldaily maximumreport only (#/100mL)all yearA01
Flowmonthly totalreport only (#/mo)all yearA01
Flowmonthly totalreport only (#/mo)all yearA01
Flow, totalmonthly totalreport only (Mgal/mo)all yearA01
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearB01
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearB01
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearB01
pHminimum≥ 6 SUall yearB01
pHminimum≥ 6 SUall yearB01
pHmaximum≤ 9 SUall yearB01
pHmaximum≤ 9 SUall yearB01
Solids, total suspendedmonthly averagereport only (mg/L)all yearB01
Solids, total suspendedmonthly averagereport only (mg/L)all yearB01
Solids, total suspendeddaily maximumreport only (mg/L)all yearB01
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearB01
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearB01
Chlorine, total residualmonthly average≤ .75 mg/Lall yearB01
Chlorine, total residualmonthly average≤ .75 mg/Lall yearB01
Coliform, fecal generaldaily maximum≤ 400 #/100mLall yearB01
Coliform, fecal generaldaily maximum≤ 400 #/100mLall yearB01
Coliform, fecal generaldaily maximumreport only (#/100mL)all yearB01
Flowmonthly totalreport only (#/mo)all yearB01
Flow, totalmonthly totalreport only (Mgal/mo)all yearB01
Flow, totalmonthly totalreport only (Mgal/mo)all yearB01
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecC01
Oxygen, dissolved [DO]minimum weekly average≥ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecC01
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LMar–JulC01
Oxygen, dissolved [DO]daily minimum≥ 3.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecC01
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar–JulC01
pHminimum≥ 6 SUall yearC01
pHmaximum≤ 9 SUall yearC01
Solids, total suspendedmonthly average≤ 12 mg/Lall yearC01
Solids, total suspendeddaily maximum≤ 24 mg/Lall yearC01
Solids, total suspendedmonthly average≤ 164 lb/dall yearC01
Solids, total suspendeddaily maximum≤ 328 lb/dall yearC01
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LMar, Apr, May, Sep, OctC01
Nitrogen, ammonia total [as N]monthly average≤ .8 mg/LJun–AugC01
Nitrogen, ammonia total [as N]monthly average≤ 2.7 mg/LJan, Feb, Nov, DecC01
Nitrogen, ammonia total [as N]daily maximum≤ 4.2 mg/LMar, Apr, May, Sep, OctC01
Nitrogen, ammonia total [as N]daily maximum≤ 4.9 mg/LJun–AugC01
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/LJan, Feb, Nov, DecC01
Nitrogen, ammonia total [as N]monthly average≤ 21 lb/dMar, Apr, May, Sep, OctC01
Nitrogen, ammonia total [as N]monthly average≤ 11 lb/dJun–AugC01
Nitrogen, ammonia total [as N]monthly average≤ 37 lb/dJan, Feb, Nov, DecC01
Nitrogen, ammonia total [as N]daily maximum≤ 57 lb/dMar, Apr, May, Sep, OctC01
Nitrogen, ammonia total [as N]daily maximum≤ 67 lb/dJun–AugC01
Nitrogen, ammonia total [as N]daily maximum≤ 55 lb/dJan, Feb, Nov, DecC01
Nitrogen, ammonia total [as N]weekly average≤ 2 mg/LJun–AugC01
Nitrogen, ammonia total [as N]weekly average≤ 3.1 mg/LMar, Apr, May, Sep, OctC01
Nitrogen, ammonia total [as N]weekly average≤ 27 lb/dJun–AugC01
Nitrogen, ammonia total [as N]weekly average≤ 42 lb/dMar, Apr, May, Sep, OctC01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearC01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearC01
Chlorine, total residualdaily maximum≤ .05 mg/Lall yearC01
Coliform, fecal generaldaily maximumreport only (#/100mL)May–OctC01
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall yearC01
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/Lall yearC01
BOD, carbonaceous [5 day, 20 C]monthly average≤ 137 lb/dall yearC01
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 274 lb/dall yearC01
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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