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ST Joseph, Village of

Sewage treatment plant, Saint Joseph, Illinois. NPDES permit IL0023086, in force until Aug 31, 2028. Last 12 months: over a limit once (last February 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (25 values), outfall INF form L monthly (4 values)
Renewal application due
Mar 4, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
February 2026Phosphorus, total [as P], geometric mean1.24 mg/L≤ 1 mg/L24%

Limits in force (33)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LMar–Jul001
Oxygen, dissolved [DO]daily minimum≥ 3.5 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≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 350 lb/dall year001
Solids, total suspendedweekly average≤ 525 lb/dall year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (lb/d)all year001
Nitrogen, ammonia total [as N]daily maximum≤ 4.4 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 4.7 mg/LJan, Feb, Jun, Jul, Aug, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 51 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 55 lb/dJan, Feb, Jun, Jul, Aug, Nov, Dec001
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, nitrate total [as N]daily maximumreport only (lb/d)all year001
Phosphorus, total [as P]geometric mean≤ 1 mg/Lall year001
Phosphorus, total [as P]geometric mean≤ 12 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≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 292 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 467 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.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0023086 · MCP: https://passage-data.com/mcp