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Carol Stream, Village of

Sewage treatment plant, major discharger, Carol Stream, Illinois. NPDES permit IL0026352, in force until May 31, 2027. Last 12 months: over a limit once (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (15 values), outfall A01 form 0 monthly (7 values), outfall B01 form 0 monthly (36 values), outfall INF form L monthly (6 values)
Renewal application due
Dec 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 48 reports late

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

Period endingParameterReportedLimitOver by
May 2026Nitrogen, ammonia total [as N], daily maximum4.7 mg/L≤ 3 mg/L57%

Limits in force (77)

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
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Chlorine, total residualmonthly average≤ .75 mg/Lall year001
Flow, totalmonthly totalreport only (MGD)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
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearA01
Phosphorus, total [as P]daily maximumreport only (mg/L)all yearA01
Coliform, fecal generaldaily maximum≤ 400 #/100mLall yearA01
Flow, totalmonthly totalreport only (Mgal/mo)all yearA01
Temperature, water deg. fahrenheitmonthly maximumreport only (deg F)all yearB01
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB01
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LMar–JulB01
Oxygen, dissolved [DO]minimum weekly average≥ 4.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB01
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar–JulB01
Oxygen, dissolved [DO]daily minimum≥ 3.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, DecB01
pHminimum≥ 6 SUall yearB01
pHmaximum≤ 9 SUall yearB01
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)all yearB01
Solids, total suspendedmonthly average≤ 12 mg/Lall yearB01
Solids, total suspendeddaily maximum≤ 24 mg/Lall yearB01
Solids, total suspendedmonthly average≤ 1301 lb/dall yearB01
Solids, total suspendeddaily maximum≤ 2602 lb/dall yearB01
Nitrogen, total [as N]daily maximumreport only (mg/L)all yearB01
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LApr–OctB01
Nitrogen, ammonia total [as N]monthly average≤ 3.9 mg/LJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]monthly average≤ 2.6 mg/LMarB01
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/LApr–OctB01
Nitrogen, ammonia total [as N]daily maximum≤ 5 mg/LJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]daily maximum≤ 8 mg/LMarB01
Nitrogen, ammonia total [as N]monthly average≤ 163 lb/dApr–OctB01
Nitrogen, ammonia total [as N]monthly average≤ 423 lb/dJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]monthly average≤ 282 lb/dMarB01
Nitrogen, ammonia total [as N]daily maximum≤ 325 lb/dApr–OctB01
Nitrogen, ammonia total [as N]daily maximum≤ 542 lb/dJan, Feb, Nov, DecB01
Nitrogen, ammonia total [as N]daily maximum≤ 867 lb/dMarB01
Nitrogen, ammonia total [as N]weekly average≤ 6.5 mg/LMarB01
Nitrogen, ammonia total [as N]weekly average≤ 705 lb/dMarB01
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all yearB01
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all yearB01
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearB01
Phosphorus, total [as P]daily maximumreport only (mg/L)all yearB01
Phosphorus, dissolved reactive [drp as P]daily maximumreport only (mg/L)all yearB01
Chloride [as Cl]daily maximumreport only (mg/L)all yearB01
Copper, total [as Cu]monthly average≤ .0258 mg/Lall yearB01
Copper, total [as Cu]daily maximum≤ .0417 mg/Lall yearB01
Copper, total [as Cu]monthly average≤ 2.8 lb/dall yearB01
Copper, total [as Cu]daily maximum≤ 4.5 lb/dall yearB01
Coliform, fecal - % samples exceeding limitmaximum≤ 10 %May–OctB01
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≤ .038 mg/LMay–OctB01
Chlorine, total residualdaily maximum≤ .038 mg/LJan, Feb, Mar, Apr, Nov, DecB01
Coliform, fecal generalgeometric mean≤ 200 #/100mLMay–OctB01
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≤ 1084 lb/dall yearB01
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 2168 lb/dall yearB01
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
Nitrogen, total [as N]daily maximumreport only (mg/L)all yearINF
Phosphorus, total [as P]daily maximumreport 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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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0026352 · MCP: https://passage-data.com/mcp