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Lexington, City of

Sewage treatment plant, Lexington, Illinois. NPDES permit IL0080282, in force until Jun 30, 2030. Last 12 months: no values over a limit, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form 0 monthly (23 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 68 required values missing, 3 of 3 reports late

Limits in force (35)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 6 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec
Oxygen, dissolved [DO]minimum weekly average≥ 6.25 mg/LMar–Jul
Oxygen, dissolved [DO]minimum weekly average≥ 4.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec
Oxygen, dissolved [DO]daily maximum≤ 5 mg/LMar–Jul
Oxygen, dissolved [DO]daily maximum≤ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 12 mg/Lall year
Solids, total suspendeddaily maximum≤ 24 mg/Lall year
Solids, total suspendedmonthly average≤ 30 lb/dall year
Solids, total suspendeddaily maximum≤ 30 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 1.7 mg/LMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LJun–Aug
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]daily maximum≤ 7.6 mg/LJun–Aug
Nitrogen, ammonia total [as N]daily maximum≤ 8.7 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 4.3 lb/dMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]monthly average≤ 2.8 lb/dJun–Aug
Nitrogen, ammonia total [as N]monthly average≤ 10 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 21 lb/dMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]daily maximum≤ 18 lb/dJun–Aug
Nitrogen, ammonia total [as N]daily maximum≤ 21 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 4.1 mg/LMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]weekly average≤ 2.7 mg/LJun–Aug
Nitrogen, ammonia total [as N]weekly average≤ 10 lb/dMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]weekly average≤ 6.8 lb/dJun–Aug
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ .05 mg/Lall year
Coliform, fecal generaldaily maximumreport only (#/100mL)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 lb/dall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 50 lb/dall year

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/IL0080282 · MCP: https://passage-data.com/mcp