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White Hall, City of

Sewage treatment plant, White Hall, Illinois. NPDES permit IL0022390, in force until Sep 30, 2030. Last 12 months: over a limit 33 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (23 values), outfall 002 form 0 monthly (15 values), outfall INF form L monthly (4 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
37 values over a limit, 0 required values missing, 0 of 36 reports late

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

All 33 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], daily maximum5.6 mg/L≤ 3 mg/L87%
October 2025Nitrogen, ammonia total [as N], monthly average4.7 mg/L≤ 1.5 mg/L213%
October 2025Oxygen, dissolved [DO], monthly average minimum4.1 mg/L≥ 5.5 mg/L25%
November 2025Nitrogen, ammonia total [as N], daily maximum10 mg/L≤ 4.9 mg/L104%
November 2025Nitrogen, ammonia total [as N], monthly average6.8 mg/L≤ 4 mg/L70%
December 2025Nitrogen, ammonia total [as N], daily maximum11 mg/L≤ 4.9 mg/L124%
December 2025Nitrogen, ammonia total [as N], monthly average6.1 mg/L≤ 4 mg/L53%
January 2026Nitrogen, ammonia total [as N], daily maximum6.4 mg/L≤ 4.9 mg/L31%
January 2026Nitrogen, ammonia total [as N], monthly average4.9 mg/L≤ 4 mg/L23%
February 2026Nitrogen, ammonia total [as N], daily maximum10 mg/L≤ 4.9 mg/L104%
February 2026Nitrogen, ammonia total [as N], monthly average4.7 mg/L≤ 4 mg/L18%
March 2026Nitrogen, ammonia total [as N], daily maximum9.3 mg/L≤ 8 mg/L16%
March 2026Nitrogen, ammonia total [as N], monthly average4.3 mg/L≤ 2 mg/L115%
March 2026Oxygen, dissolved [DO], daily minimum2.9 mg/L≥ 5 mg/L42%
March 2026Oxygen, dissolved [DO], minimum weekly average2.9 mg/L≥ 6 mg/L52%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average12 mg/L≤ 10 mg/L20%
May 2026Nitrogen, ammonia total [as N], daily maximum4.9 mg/L≤ 3 mg/L63%
May 2026Nitrogen, ammonia total [as N], monthly average2.12 mg/L≤ 1.5 mg/L41%
June 2026Nitrogen, ammonia total [as N], daily maximum29 lb/d≤ 23 lb/d26%
June 2026Nitrogen, ammonia total [as N], daily maximum7.7 mg/L≤ 3 mg/L157%
June 2026Nitrogen, ammonia total [as N], monthly average3.9 mg/L≤ 1.5 mg/L160%
June 2026Oxygen, dissolved [DO], minimum weekly average5.1 mg/L≥ 6 mg/L15%
July 2026Nitrogen, ammonia total [as N], daily maximum12 mg/L≤ 3 mg/L300%
July 2026Nitrogen, ammonia total [as N], daily maximum49.9 lb/d≤ 23 lb/d117%
July 2026Nitrogen, ammonia total [as N], monthly average32 lb/d≤ 12 lb/d167%
July 2026Nitrogen, ammonia total [as N], monthly average6.5 mg/L≤ 1.5 mg/L333%
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%
August 2026Nitrogen, ammonia total [as N], daily maximum15 mg/L≤ 3 mg/L400%
August 2026Nitrogen, ammonia total [as N], daily maximum48.3 lb/d≤ 23 lb/d110%
August 2026Nitrogen, ammonia total [as N], monthly average22.6 lb/d≤ 12 lb/d88%
August 2026Nitrogen, ammonia total [as N], monthly average9.7 mg/L≤ 1.5 mg/L547%
August 2026Oxygen, dissolved [DO], monthly average minimum4.2 mg/L≥ 5.5 mg/L24%

Limits in force (54)

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≤ 20 mg/Lall year001
Solids, total suspendeddaily maximum≤ 24 mg/Lall year001
Solids, total suspendedmonthly average≤ 94 lb/dall year001
Solids, total suspendeddaily maximum≤ 187 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LApr–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 8 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/LApr–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 4.9 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 16 lb/dMar001
Nitrogen, ammonia total [as N]monthly average≤ 12 lb/dApr–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 31 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 62 lb/dMar001
Nitrogen, ammonia total [as N]daily maximum≤ 23 lb/dApr–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 38 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 4.9 mg/LMar001
Nitrogen, ammonia total [as N]weekly average≤ 38 lb/dMar001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (lb/d)all year001
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≤ 78 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 156 lb/dall year001
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)all year002
Oxygen, dissolved [DO]minimum weekly averagereport only (mg/L)all year002
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year002
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year002
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year002
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendedweekly average≤ 45 mg/Lall year002
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year002
Phosphorus, total [as P]monthly averagereport only (mg/L)all year002
Phosphorus, total [as P]daily maximumreport only (mg/L)all year002
Chlorine, total residualdaily maximum≤ .75 mg/Lall year002
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year002
Flow, totalmonthly totalreport only (Mgal/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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