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Earlville, City of

Sewage treatment plant, Earlville, Illinois. NPDES permit IL0020877, in force until Oct 31, 2027. Last 12 months: no values over a limit, 16 of 44 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 002 form 0 monthly (13 values), outfall A02 form 0 monthly (5 values), outfall B02 form 0 monthly (21 values), outfall INF form L monthly (4 values)
Renewal application due
May 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 48 reports late

Limits in force (53)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)all year002
Oxygen, dissolved [DO]minimum weekly averagereport only (mg/L)all year002
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year002
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year002
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year002
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendedweekly average≤ 45 mg/Lall year002
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year002
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year002
Chlorine, total residualmonthly average≤ .75 mg/Lall year002
Flow, totalmonthly totalreport only (Mgal/mo)all year002
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearA02
Solids, total suspendedmonthly averagereport only (mg/L)all yearA02
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearA02
Coliform, fecal generaldaily maximum≤ 400 #/100mLall yearA02
Flow, totalmonthly totalreport only (Mgal/mo)all yearA02
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB02
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LMar–JulB02
Oxygen, dissolved [DO]minimum weekly average≥ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB02
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar–JulB02
Oxygen, dissolved [DO]daily minimum≥ 3.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB02
pHminimum≥ 6 SUall yearB02
pHmaximum≤ 9 SUall yearB02
Solids, total suspendedmonthly average≤ 12 mg/Lall yearB02
Solids, total suspendeddaily maximum≤ 24 mg/Lall yearB02
Solids, total suspendedmonthly average≤ 113 lb/dall yearB02
Solids, total suspendeddaily maximum≤ 226 lb/dall yearB02
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LMar, Apr, May, Sep, OctB02
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJun–AugB02
Nitrogen, ammonia total [as N]monthly average≤ 2.8 mg/LJan, Feb, Nov, DecB02
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 mg/LMar, Apr, May, Sep, OctB02
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LJun–AugB02
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 mg/LJan, Feb, Nov, DecB02
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dMar, Apr, May, Sep, OctB02
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dJun–AugB02
Nitrogen, ammonia total [as N]monthly average≤ 26 lb/dJan, Feb, Nov, DecB02
Nitrogen, ammonia total [as N]daily maximum≤ 32 lb/dMar, Apr, May, Sep, OctB02
Nitrogen, ammonia total [as N]daily maximum≤ 30 lb/dJun–AugB02
Nitrogen, ammonia total [as N]daily maximum≤ 32 lb/dJan, Feb, Nov, DecB02
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearB02
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearB02
Chlorine, total residualdaily maximum≤ .05 mg/Lall yearB02
Coliform, fecal generaldaily maximumreport only (#/100mL)May–OctB02
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall yearB02
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/Lall yearB02
BOD, carbonaceous [5 day, 20 C]monthly average≤ 94 lb/dall yearB02
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 188 lb/dall yearB02
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/IL0020877 · MCP: https://passage-data.com/mcp