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New Simpson Hill School District #32

Elementary And Secondary Schools, Tunnel Hill, Illinois. NPDES permit IL0074781, in force until Mar 31, 2028. Last 12 months: over a limit 12 times (last July 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)
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 24 of 24 reports late

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

Period endingParameterReportedLimitOver by
November 2025BOD, carbonaceous [5 day, 20 C], monthly average14.58 mg/L≤ 10 mg/L46%
November 2025Solids, total suspended, daily maximum58 mg/L≤ 24 mg/L142%
November 2025Solids, total suspended, monthly average58 mg/L≤ 12 mg/L383%
January 2026Solids, total suspended, monthly average16 mg/L≤ 12 mg/L33%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average13 mg/L≤ 10 mg/L30%
March 2026Nitrogen, ammonia total [as N], monthly average4.06 mg/L≤ 2 mg/L103%
March 2026Solids, total suspended, monthly average19 mg/L≤ 12 mg/L58%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average16 mg/L≤ 10 mg/L60%
May 2026Solids, total suspended, monthly average13 mg/L≤ 12 mg/L8%
July 2026Chlorine, total residual, daily maximum.07 mg/L≤ .05 mg/L40%
July 2026Oxygen, dissolved [DO], daily minimum4.9 mg/L≥ 5 mg/L2%
July 2026Oxygen, dissolved [DO], minimum weekly average4.9 mg/L≥ 6 mg/L18%

Limits in force (39)

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≤ 12 mg/Lall year001
Solids, total suspendeddaily maximum≤ 24 mg/Lall year001
Solids, total suspendedmonthly average≤ 4 lb/dall year001
Solids, total suspendeddaily maximum≤ 8 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 5.3 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .67 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ .5 lb/dJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 4 lb/dJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 1.8 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 3.7 mg/LJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 4.9 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]weekly average≤ 1.2 lb/dJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 1.6 lb/dMar, Apr, 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≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 3.3 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 6.7 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.

Same industry: the 52 Educational Services permits in Illinois.

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Your permit document is the final word. As JSON: /api/v1/permits/IL0074781 · MCP: https://passage-data.com/mcp