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Atwood, Village of

Sewage treatment plant, Atwood, Illinois. NPDES permit IL0025097, in force until Jul 31, 2029. Last 12 months: over a limit 41 times (last May 2026), 4 required values missing, 2 of 48 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (14 values), outfall A01 form 0 monthly (4 values), outfall B01 form 0 monthly (21 values), outfall INF form L monthly (4 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
18 values over a limit, 0 required values missing, 0 of 48 reports late

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

All 41 values over a limit
Period endingOutfallParameterReportedLimitOver by
October 2025B01BOD, carbonaceous [5 day, 20 C], monthly average16 mg/L≤ 10 mg/L60%
October 2025B01Nitrogen, ammonia total [as N], daily maximum10.1 lb/d≤ 9.6 lb/d5%
October 2025B01Nitrogen, ammonia total [as N], daily maximum16.2 mg/L≤ 2.3 mg/L604%
October 2025B01Nitrogen, ammonia total [as N], monthly average12.428 mg/L≤ 1.2 mg/L936%
October 2025B01Nitrogen, ammonia total [as N], monthly average7.376 lb/d≤ 5 lb/d48%
October 2025B01Oxygen, dissolved [DO], daily minimum2.27 mg/L≥ 3.5 mg/L35%
October 2025B01Oxygen, dissolved [DO], monthly average minimum4.29 mg/L≥ 5.5 mg/L22%
October 2025B01Solids, total suspended, daily maximum128 lb/d≤ 100 lb/d28%
October 2025B01Solids, total suspended, daily maximum204 mg/L≤ 24 mg/L750%
October 2025B01Solids, total suspended, monthly average112 mg/L≤ 12 mg/L833%
October 2025B01Solids, total suspended, monthly average67 lb/d≤ 50 lb/d34%
November 2025B01BOD, carbonaceous [5 day, 20 C], monthly average19 mg/L≤ 10 mg/L90%
November 2025B01Nitrogen, ammonia total [as N], daily maximum22.7 lb/d≤ 18 lb/d26%
November 2025B01Nitrogen, ammonia total [as N], daily maximum24.6 mg/L≤ 4.4 mg/L459%
November 2025B01Nitrogen, ammonia total [as N], monthly average15.1 lb/d≤ 14 lb/d8%
November 2025B01Nitrogen, ammonia total [as N], monthly average21.4 mg/L≤ 3.3 mg/L548%
November 2025B01Solids, total suspended, daily maximum99 mg/L≤ 24 mg/L313%
November 2025B01Solids, total suspended, monthly average64 mg/L≤ 12 mg/L433%
December 2025B01Nitrogen, ammonia total [as N], daily maximum23.7 lb/d≤ 18 lb/d32%
December 2025B01Nitrogen, ammonia total [as N], daily maximum27.4 mg/L≤ 4.4 mg/L523%
December 2025B01Nitrogen, ammonia total [as N], monthly average13.27 mg/L≤ 3.3 mg/L302%
December 2025B01Solids, total suspended, daily maximum95 mg/L≤ 24 mg/L296%
December 2025B01Solids, total suspended, monthly average51.3 mg/L≤ 12 mg/L328%
January 2026B01Solids, total suspended, monthly average17.2 mg/L≤ 12 mg/L43%
February 2026B01Solids, total suspended, daily maximum29 mg/L≤ 24 mg/L21%
February 2026B01Solids, total suspended, monthly average22 mg/L≤ 12 mg/L83%
March 2026001Coliform, fecal general, daily maximum20000 #/100mL≤ 400 #/100mL4900%
March 2026B01Nitrogen, ammonia total [as N], daily maximum17.02 lb/d≤ 9.6 lb/d77%
March 2026B01Nitrogen, ammonia total [as N], daily maximum5.85 mg/L≤ 2.3 mg/L154%
March 2026B01Nitrogen, ammonia total [as N], monthly average2.791 mg/L≤ 1.3 mg/L115%
March 2026B01Nitrogen, ammonia total [as N], monthly average6.524 lb/d≤ 5.4 lb/d21%
March 2026B01Solids, total suspended, daily maximum133 lb/d≤ 100 lb/d33%
March 2026B01Solids, total suspended, daily maximum46 mg/L≤ 24 mg/L92%
March 2026B01Solids, total suspended, monthly average21.5 mg/L≤ 12 mg/L79%
March 2026B01Solids, total suspended, monthly average53 lb/d≤ 50 lb/d6%
April 2026B01Nitrogen, ammonia total [as N], daily maximum14.41 lb/d≤ 9.6 lb/d50%
April 2026B01Nitrogen, ammonia total [as N], daily maximum3.8 mg/L≤ 2.3 mg/L65%
April 2026B01Solids, total suspended, daily maximum45 mg/L≤ 24 mg/L88%
April 2026B01Solids, total suspended, monthly average27 mg/L≤ 12 mg/L125%
April 2026B01Solids, total suspended, monthly average74 lb/d≤ 50 lb/d48%
May 2026001Coliform, fecal general, daily maximum11000 #/100mL≤ 400 #/100mL2650%

Limits in force (59)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)all year001
Oxygen, dissolved [DO]minimum weekly averagereport only (mg/L)all year001
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Chlorine, total residualmonthly average≤ .75 mg/Lall year001
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearA01
Solids, total suspendeddaily maximumreport only (mg/L)all yearA01
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearA01
Flow, totalmonthly totalreport only (Mgal/mo)all yearA01
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB01
Oxygen, dissolved [DO]minimum weekly average≥ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB01
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LMar–JulB01
Oxygen, dissolved [DO]daily minimum≥ 3.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB01
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar–JulB01
pHminimum≥ 6 SUall yearB01
pHmaximum≤ 9 SUall yearB01
Solids, total suspendedmonthly average≤ 12 mg/Lall yearB01
Solids, total suspendeddaily maximum≤ 24 mg/Lall yearB01
Solids, total suspendedmonthly average≤ 50 lb/dall yearB01
Solids, total suspendeddaily maximum≤ 100 lb/dall yearB01
Nitrogen, ammonia total [as N]weekly average≤ 2.3 mg/LJun–AugB01
Nitrogen, ammonia total [as N]weekly average≤ 9.6 lb/dJun–AugB01
Nitrogen, ammonia total [as N]monthly average≤ .9 mg/LJun–AugB01
Nitrogen, ammonia total [as N]monthly average≤ 3.3 mg/LJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]monthly average≤ 1.2 mg/LApr, May, Sep, OctB01
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LMarB01
Nitrogen, ammonia total [as N]daily maximum≤ 3.3 mg/LJun–AugB01
Nitrogen, ammonia total [as N]daily maximum≤ 4.4 mg/LJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]daily maximum≤ 2.3 mg/LApr, May, Sep, OctB01
Nitrogen, ammonia total [as N]daily maximum≤ 2.3 mg/LMarB01
Nitrogen, ammonia total [as N]monthly average≤ 3.8 lb/dJun–AugB01
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]monthly average≤ 5 lb/dApr, May, Sep, OctB01
Nitrogen, ammonia total [as N]monthly average≤ 5.4 lb/dMarB01
Nitrogen, ammonia total [as N]daily maximum≤ 14 lb/dJun–AugB01
Nitrogen, ammonia total [as N]daily maximum≤ 18 lb/dJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]daily maximum≤ 9.6 lb/dApr, May, Sep, OctB01
Nitrogen, ammonia total [as N]daily maximum≤ 9.6 lb/dMarB01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearB01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearB01
Chlorine, total residualdaily maximum≤ .05 mg/Lall yearB01
Coliform, fecal generaldaily maximumreport only (#/100mL)May–OctB01
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall yearB01
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/Lall yearB01
BOD, carbonaceous [5 day, 20 C]monthly average≤ 42 lb/dall yearB01
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 83 lb/dall yearB01
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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