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Hinckley, Village of

Sewage treatment plant, Hinckley, Illinois. NPDES permit IL0050628, in force until Jan 31, 2028. Last 12 months: over a limit 7 times (last July 2026), 4 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (26 values), outfall INF form L monthly (4 values)
Renewal application due
Aug 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 24 reports late

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

Period endingParameterReportedLimitOver by
November 2025Solids, total suspended, daily maximum31 mg/L≤ 24 mg/L29%
November 2025Solids, total suspended, monthly average14.875 mg/L≤ 12 mg/L24%
December 2025Solids, total suspended, daily maximum53 mg/L≤ 24 mg/L121%
December 2025Solids, total suspended, monthly average19.8 mg/L≤ 12 mg/L65%
January 2026BOD, carbonaceous [5 day, 20 C], daily maximum36 mg/L≤ 20 mg/L80%
June 2026Solids, total suspended, daily maximum63 mg/L≤ 24 mg/L163%
July 2026Coliform, fecal general, daily maximum600 #/100mL≤ 400 #/100mL50%

Limits in force (48)

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≤ 12 mg/Lall year001
Solids, total suspendeddaily maximum≤ 24 mg/Lall year001
Solids, total suspendedmonthly average≤ 125 lb/dall year001
Solids, total suspendeddaily maximum≤ 250 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LMar001
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 1.6 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 4.9 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 4.4 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 4.4 mg/LJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 16 lb/dMar001
Nitrogen, ammonia total [as N]monthly average≤ 11 lb/dApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 11 lb/dJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 17 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 51 lb/dMar001
Nitrogen, ammonia total [as N]daily maximum≤ 46 lb/dApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 46 lb/dJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 41 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 3.4 mg/LJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 3.8 mg/LMar001
Nitrogen, ammonia total [as N]weekly average≤ 3.8 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]weekly average≤ 35 lb/dJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 40 lb/dMar001
Nitrogen, ammonia total [as N]weekly average≤ 40 lb/dApr, May, Sep, Oct001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year001
Phosphorus, total [as P]monthly average≤ 10 lb/dall 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
Chlorine, total residualdaily maximum≤ .05 mg/Lall year001
Coliform, fecal generaldaily maximum≤ 400 #/100mLMay–Oct001
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]monthly average≤ 104 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 209 lb/dall year001
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/IL0050628 · MCP: https://passage-data.com/mcp