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New Windsor, Village of

Sewage treatment plant, New Windsor, Illinois. NPDES permit IL0079162, in force until Mar 31, 2027. Last 12 months: over a limit 16 times (last April 2026), 20 required values missing, 16 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 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
16 values over a limit, 42 required values missing, 18 of 24 reports late

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

All 16 values over a limit
Period endingParameterReportedLimitOver by
October 2025Chlorine, total residual, daily maximum.26 mg/L≤ .05 mg/L420%
November 2025Chlorine, total residual, daily maximum.08 mg/L≤ .05 mg/L60%
December 2025Nitrogen, ammonia total [as N], daily maximum4.43 mg/L≤ 3.4 mg/L30%
December 2025Nitrogen, ammonia total [as N], monthly average4.43 mg/L≤ 3.3 mg/L34%
January 2026Nitrogen, ammonia total [as N], daily maximum4.43 mg/L≤ 3.4 mg/L30%
January 2026Nitrogen, ammonia total [as N], monthly average4.43 mg/L≤ 3.3 mg/L34%
March 2026Nitrogen, ammonia total [as N], daily maximum25.6 mg/L≤ 3.9 mg/L556%
March 2026Nitrogen, ammonia total [as N], monthly average25.6 mg/L≤ 1.3 mg/L1869%
March 2026Nitrogen, ammonia total [as N], monthly average5.098 lb/d≤ 4.1 lb/d24%
March 2026Nitrogen, ammonia total [as N], weekly average25.6 mg/L≤ 3.3 mg/L676%
April 2026Nitrogen, ammonia total [as N], daily maximum4.39 mg/L≤ 3.9 mg/L13%
April 2026Nitrogen, ammonia total [as N], daily maximum4.39 mg/L≤ 3.9 mg/L13%
April 2026Nitrogen, ammonia total [as N], monthly average4.39 mg/L≤ 1.3 mg/L238%
April 2026Nitrogen, ammonia total [as N], monthly average4.39 mg/L≤ 1.3 mg/L238%
April 2026Nitrogen, ammonia total [as N], weekly average4.39 mg/L≤ 3.3 mg/L33%
April 2026Nitrogen, ammonia total [as N], weekly average4.39 mg/L≤ 3.3 mg/L33%

Limits in force (40)

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≤ 37 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 117 lb/dall year001
Solids, total suspendedweekly average≤ 143 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ .8 mg/LJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 3.3 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 4.7 mg/LJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 4.1 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 2.5 lb/dJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 10 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 12 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 15 lb/dJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 11 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 2 mg/LJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 3.3 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]weekly average≤ 6.3 lb/dJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 10 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
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≤ 79 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 127 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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