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Springerton, Village of

Sewage treatment plant, Springerton, Illinois. NPDES permit IL0054496, in force until Nov 30, 2029. Last 12 months: over a limit 14 times (last April 2026), 6 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (23 values), outfall INF form L monthly (4 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
13 values over a limit, 0 required values missing, 24 of 24 reports late

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

All 14 values over a limit
Period endingParameterReportedLimitOver by
February 2026BOD, carbonaceous [5 day, 20 C], monthly average50 mg/L≤ 25 mg/L100%
February 2026BOD, carbonaceous [5 day, 20 C], weekly average50 mg/L≤ 40 mg/L25%
February 2026Nitrogen, ammonia total [as N], daily maximum57.5 mg/L≤ 11.3 mg/L409%
February 2026Nitrogen, ammonia total [as N], monthly average3.26 lb/d≤ 3.1 lb/d5%
February 2026Nitrogen, ammonia total [as N], monthly average57.5 mg/L≤ 4.6 mg/L1150%
February 2026Oxygen, dissolved [DO], daily minimum1.1 mg/L≥ 3.5 mg/L69%
February 2026Oxygen, dissolved [DO], minimum weekly average1.1 mg/L≥ 4 mg/L73%
February 2026Oxygen, dissolved [DO], monthly average minimum1.1 mg/L≥ 5.5 mg/L80%
March 2026Nitrogen, ammonia total [as N], daily maximum22.8 mg/L≤ 12.1 mg/L88%
March 2026Nitrogen, ammonia total [as N], monthly average1.5 lb/d≤ 1.4 lb/d7%
March 2026Nitrogen, ammonia total [as N], monthly average22.8 mg/L≤ 2.1 mg/L986%
March 2026Nitrogen, ammonia total [as N], weekly average22.8 mg/L≤ 5.3 mg/L330%
April 2026Nitrogen, ammonia total [as N], monthly average7.85 mg/L≤ 1.8 mg/L336%
April 2026Nitrogen, ammonia total [as N], weekly average7.85 mg/L≤ 5.3 mg/L48%

Limits in force (45)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LMar–Jul001
Oxygen, dissolved [DO]minimum weekly average≥ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar–Jul001
Oxygen, dissolved [DO]daily minimum≥ 3.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 37 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 25 lb/dall year001
Solids, total suspendedweekly average≤ 30 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 2.1 mg/LMar001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.7 mg/LJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 4.6 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 10.5 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 10.5 mg/LJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 11.3 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.4 lb/dMar001
Nitrogen, ammonia total [as N]monthly average≤ 1.2 lb/dApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.1 lb/dJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 3.1 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 8.1 lb/dMar001
Nitrogen, ammonia total [as N]daily maximum≤ 7 lb/dApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 7 lb/dJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 7.5 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 4.2 mg/LJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 5.3 mg/LMar001
Nitrogen, ammonia total [as N]weekly average≤ 5.3 mg/LApr, May, Sep, Oct001
Nitrogen, ammonia total [as N]weekly average≤ 2.8 lb/dJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 3.5 lb/dMar001
Nitrogen, ammonia total [as N]weekly average≤ 3.5 lb/dApr, May, Sep, Oct001
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 (#/100mL)May–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≤ 17 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 27 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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Your permit document is the final word. As JSON: /api/v1/permits/IL0054496 · MCP: https://passage-data.com/mcp