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Oregon, City of

Sewage treatment plant, Oregon, Illinois. NPDES permit IL0020184, in force until Oct 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 009 form 0 monthly (20 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 25 reports late

Limits in force (35)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year009
pHmaximum≤ 9 SUall year009
Solids, total suspendedmonthly average≤ 30 mg/Lall year009
Solids, total suspendedweekly average≤ 45 mg/Lall year009
Solids, total suspendedmonthly average≤ 310 lb/dall year009
Solids, total suspendedweekly average≤ 465 lb/dall year009
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LMar, Apr, May, Sep, Oct009
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LJun–Aug009
Nitrogen, ammonia total [as N]monthly average≤ 3.4 mg/LJan, Feb, Nov, Dec009
Nitrogen, ammonia total [as N]daily maximum≤ 4.3 mg/LMar, Apr, May, Sep, Oct009
Nitrogen, ammonia total [as N]daily maximum≤ 6.9 mg/LJun–Aug009
Nitrogen, ammonia total [as N]daily maximum≤ 6 mg/LJan, Feb, Nov, Dec009
Nitrogen, ammonia total [as N]monthly average≤ 16 lb/dMar, Apr, May, Sep, Oct009
Nitrogen, ammonia total [as N]monthly average≤ 11 lb/dJun–Aug009
Nitrogen, ammonia total [as N]monthly average≤ 35 lb/dJan, Feb, Nov, Dec009
Nitrogen, ammonia total [as N]daily maximum≤ 44 lb/dMar, Apr, May, Sep, Oct009
Nitrogen, ammonia total [as N]daily maximum≤ 71 lb/dJun–Aug009
Nitrogen, ammonia total [as N]daily maximum≤ 62 lb/dJan, Feb, Nov, Dec009
Nitrogen, ammonia total [as N]weekly average≤ 3.8 mg/LMar, Apr, May, Sep, Oct009
Nitrogen, ammonia total [as N]weekly average≤ 2.7 mg/LJun–Aug009
Nitrogen, ammonia total [as N]weekly average≤ 39 lb/dMar, Apr, May, Sep, Oct009
Nitrogen, ammonia total [as N]weekly average≤ 28 lb/dJun–Aug009
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year009
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year009
Chlorine, total residualdaily maximum≤ .05 mg/LJan, Feb, Mar, Apr, Nov, Dec009
Chlorine, total residualdaily maximum≤ .05 mg/LMay–Oct009
Coliform, fecal generaldaily maximum≤ 400 #/100mLMay–Oct009
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year009
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year009
BOD, carbonaceous [5 day, 20 C]monthly average≤ 259 lb/dall year009
BOD, carbonaceous [5 day, 20 C]weekly average≤ 414 lb/dall year009
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/IL0020184 · MCP: https://passage-data.com/mcp