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Capron, Village of

Sewage treatment plant, Capron, Illinois. NPDES permit IL0027855, in force until Aug 31, 2031. Last 12 months: over a limit 11 times (last May 2026), 14 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (21 values), outfall INF form L monthly (4 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 6 of 24 reports late

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

Period endingParameterReportedLimitOver by
October 2025Solids, total suspended, daily maximum30 mg/L≤ 24 mg/L25%
October 2025Solids, total suspended, monthly average12.2 mg/L≤ 12 mg/L2%
January 2026Solids, total suspended, daily maximum44 mg/L≤ 24 mg/L83%
January 2026Solids, total suspended, monthly average17 mg/L≤ 12 mg/L42%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average< 10.2 mg/L≤ 10 mg/L2%
April 2026Nitrogen, ammonia total [as N], daily maximum13.3 mg/L≤ 3 mg/L343%
April 2026Nitrogen, ammonia total [as N], daily maximum72.543 lb/d≤ 28 lb/d159%
April 2026Nitrogen, ammonia total [as N], monthly average< 28.908 lb/d≤ 14 lb/d106%
April 2026Nitrogen, ammonia total [as N], monthly average< 5.3 mg/L≤ 1.5 mg/L253%
May 2026Nitrogen, ammonia total [as N], daily maximum14.3 mg/L≤ 3 mg/L377%
May 2026Nitrogen, ammonia total [as N], monthly average< 3.65 mg/L≤ 1.5 mg/L143%

Limits in force (41)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimum≥ 6 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≥ 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≤ 113 lb/dall year001
Solids, total suspendeddaily maximum≤ 225 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LMar001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 3.3 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 4.7 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/LJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 5.4 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dMar001
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 10 lb/dJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 31 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 44 lb/dMar001
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 28 lb/dJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 51 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 3.8 mg/LMar001
Nitrogen, ammonia total [as N]weekly average≤ 36 lb/dMar001
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 maximumreport only (#/mL)May–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≤ 94 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 188 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/IL0027855 · MCP: https://passage-data.com/mcp