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Alexis, Village of

Sewage treatment plant, Alexis, Illinois. NPDES permit IL0021211, in force until Jan 31, 2028. Last 12 months: over a limit 80 times (last August 2026), 4 of 33 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
Aug 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
60 values over a limit, 0 required values missing, 0 of 36 reports late

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

All 80 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], monthly average< 12.5 mg/L≤ 10 mg/L25%
October 2025Nitrogen, ammonia total [as N], daily maximum18.3 mg/L≤ 5.7 mg/L221%
October 2025Nitrogen, ammonia total [as N], monthly average< 12.325 mg/L≤ 1.6 mg/L670%
October 2025Nitrogen, ammonia total [as N], weekly average18.3 mg/L≤ 4 mg/L358%
October 2025Solids, total suspended, daily maximum31 mg/L≤ 24 mg/L29%
October 2025Solids, total suspended, monthly average15.75 mg/L≤ 12 mg/L31%
November 2025BOD, carbonaceous [5 day, 20 C], daily maximum23 mg/L≤ 20 mg/L15%
November 2025BOD, carbonaceous [5 day, 20 C], monthly average< 16.75 mg/L≤ 10 mg/L67%
November 2025Nitrogen, ammonia total [as N], daily maximum21.5 mg/L≤ 3.4 mg/L532%
November 2025Solids, total suspended, daily maximum32 mg/L≤ 24 mg/L33%
November 2025Solids, total suspended, monthly average22.25 mg/L≤ 12 mg/L85%
December 2025BOD, carbonaceous [5 day, 20 C], daily maximum21 mg/L≤ 20 mg/L5%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average13.75 mg/L≤ 10 mg/L38%
December 2025Nitrogen, ammonia total [as N], daily maximum17.684 lb/d≤ 10 lb/d77%
December 2025Nitrogen, ammonia total [as N], daily maximum18.6 mg/L≤ 3.4 mg/L447%
December 2025Solids, total suspended, daily maximum25 mg/L≤ 24 mg/L4%
December 2025Solids, total suspended, monthly average17 mg/L≤ 12 mg/L42%
January 2026Nitrogen, ammonia total [as N], daily maximum13.1 mg/L≤ 3.4 mg/L285%
January 2026Nitrogen, ammonia total [as N], daily maximum13.766 lb/d≤ 10 lb/d38%
January 2026Solids, total suspended, monthly average12.5 mg/L≤ 12 mg/L4%
February 2026BOD, carbonaceous [5 day, 20 C], daily maximum28 mg/L≤ 20 mg/L40%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average23 mg/L≤ 10 mg/L130%
February 2026Nitrogen, ammonia total [as N], daily maximum17 mg/L≤ 3.4 mg/L400%
February 2026Solids, total suspended, monthly average17.25 mg/L≤ 12 mg/L44%
March 2026BOD, carbonaceous [5 day, 20 C], daily maximum106.785 lb/d≤ 60 lb/d78%
March 2026BOD, carbonaceous [5 day, 20 C], daily maximum33 mg/L≤ 20 mg/L65%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average< 19.5 mg/L≤ 10 mg/L95%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average< 63.1 lb/d≤ 30 lb/d110%
March 2026Nitrogen, ammonia total [as N], daily maximum18.2 mg/L≤ 5.7 mg/L219%
March 2026Nitrogen, ammonia total [as N], daily maximum58.894 lb/d≤ 17 lb/d246%
March 2026Nitrogen, ammonia total [as N], monthly average< 31.518 lb/d≤ 4.8 lb/d557%
March 2026Nitrogen, ammonia total [as N], monthly average< 9.74 mg/L≤ 1.6 mg/L509%
March 2026Nitrogen, ammonia total [as N], weekly average18.2 mg/L≤ 4 mg/L355%
March 2026Nitrogen, ammonia total [as N], weekly average58.894 lb/d≤ 12 lb/d391%
March 2026Solids, total suspended, daily maximum155.324 lb/d≤ 72 lb/d116%
March 2026Solids, total suspended, daily maximum48 mg/L≤ 24 mg/L100%
March 2026Solids, total suspended, monthly average< 22 mg/L≤ 12 mg/L83%
March 2026Solids, total suspended, monthly average< 71.19 lb/d≤ 36 lb/d98%
April 2026Nitrogen, ammonia total [as N], daily maximum27.787 lb/d≤ 17 lb/d63%
April 2026Nitrogen, ammonia total [as N], daily maximum6.52 mg/L≤ 5.7 mg/L14%
April 2026Nitrogen, ammonia total [as N], monthly average17.58 lb/d≤ 4.8 lb/d266%
April 2026Nitrogen, ammonia total [as N], monthly average4.125 mg/L≤ 1.6 mg/L158%
April 2026Nitrogen, ammonia total [as N], weekly average27.787 lb/d≤ 12 lb/d132%
April 2026Nitrogen, ammonia total [as N], weekly average6.52 mg/L≤ 4 mg/L63%
May 2026BOD, carbonaceous [5 day, 20 C], daily maximum24 mg/L≤ 20 mg/L20%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average< 12.75 mg/L≤ 10 mg/L27%
May 2026Nitrogen, ammonia total [as N], monthly average4.068 mg/L≤ 1.6 mg/L154%
May 2026Nitrogen, ammonia total [as N], monthly average7.091 lb/d≤ 4.8 lb/d48%
May 2026Nitrogen, ammonia total [as N], weekly average4.94 mg/L≤ 4 mg/L24%
May 2026Oxygen, dissolved [DO], daily minimum4.5 mg/L≥ 5 mg/L10%
May 2026Oxygen, dissolved [DO], minimum weekly average4.53 mg/L≥ 6 mg/L25%
May 2026Solids, total suspended, daily maximum28 mg/L≤ 24 mg/L17%
May 2026Solids, total suspended, monthly average18.5 mg/L≤ 12 mg/L54%
June 2026Nitrogen, ammonia total [as N], daily maximum21.76 lb/d≤ 18 lb/d21%
June 2026Nitrogen, ammonia total [as N], daily maximum6.83 mg/L≤ 6.1 mg/L12%
June 2026Nitrogen, ammonia total [as N], monthly average14.792 lb/d≤ 4.2 lb/d252%
June 2026Nitrogen, ammonia total [as N], monthly average4.643 mg/L≤ 1.4 mg/L232%
June 2026Nitrogen, ammonia total [as N], weekly average21.76 lb/d≤ 10 lb/d118%
June 2026Nitrogen, ammonia total [as N], weekly average6.83 mg/L≤ 3.5 mg/L95%
June 2026Oxygen, dissolved [DO], daily minimum4.6 mg/L≥ 5 mg/L8%
June 2026Oxygen, dissolved [DO], minimum weekly average4.6 mg/L≥ 6 mg/L23%
July 2026Nitrogen, ammonia total [as N], daily maximum8.74 mg/L≤ 6.1 mg/L43%
July 2026Nitrogen, ammonia total [as N], monthly average< 3.103 mg/L≤ 1.4 mg/L122%
July 2026Nitrogen, ammonia total [as N], monthly average< 6.159 lb/d≤ 4.2 lb/d47%
July 2026Nitrogen, ammonia total [as N], weekly average17.348 lb/d≤ 10 lb/d73%
July 2026Nitrogen, ammonia total [as N], weekly average8.74 mg/L≤ 3.5 mg/L150%
July 2026Oxygen, dissolved [DO], daily minimum3.54 mg/L≥ 5 mg/L29%
July 2026Oxygen, dissolved [DO], minimum weekly average3.54 mg/L≥ 6 mg/L41%
July 2026Solids, total suspended, daily maximum40 mg/L≤ 24 mg/L67%
July 2026Solids, total suspended, daily maximum79.397 lb/d≤ 72 lb/d10%
July 2026Solids, total suspended, monthly average24.25 mg/L≤ 12 mg/L102%
July 2026Solids, total suspended, monthly average48.134 lb/d≤ 36 lb/d34%
July 2026pH, maximum9.42 SU≤ 9 SU—
August 2026Nitrogen, ammonia total [as N], monthly average< 1.647 mg/L≤ 1.4 mg/L18%
August 2026Nitrogen, ammonia total [as N], monthly average< 6.662 lb/d≤ 4.2 lb/d59%
August 2026Nitrogen, ammonia total [as N], weekly average18 lb/d≤ 10 lb/d80%
August 2026Nitrogen, ammonia total [as N], weekly average4.45 mg/L≤ 3.5 mg/L27%
August 2026Oxygen, dissolved [DO], daily minimum2.89 mg/L≥ 3.5 mg/L17%
August 2026Oxygen, dissolved [DO], minimum weekly average2.89 mg/L≥ 4 mg/L28%
August 2026Oxygen, dissolved [DO], monthly average minimum4.103 mg/L≥ 5.5 mg/L25%

Limits in force (41)

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≤ 36 lb/dall year001
Solids, total suspendeddaily maximum≤ 72 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.6 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.4 mg/LJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 5.7 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 6.1 mg/LJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 4.8 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 4.2 lb/dJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 17 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 18 lb/dJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 10 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 3.5 mg/LJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]weekly average≤ 10 lb/dJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 12 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≤ 30 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 60 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Coliform, fecal generaldaily maximumreport only (#/100mL)all year002
Flowmonthly totalreport only (#/mo)all year002
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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