ELMHURST, CITY OF

NPDES permit IL0028746 · Major POTW · administratively continued, expires 2023-07-31 · EPA's file as of 2026-09-19

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Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2023-07-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

4values over a limit
0required values missing, on 0 form(s)
0of 178 forms filed late

Last period with anything received: 2026-07-31. Most often over: Coliform, fecal general (3), BOD, carbonaceous [5 day, 20 C] (1).

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (145)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MO AV MN report only all year
001Oxygen, dissolved [DO]MN WK AV report only all year
001Oxygen, dissolved [DO]DAILY MN report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Chlorine, total residualMO AVG <= .75 mg/L all year
001Flow, totalMO TOTAL report only all year
002BOD, 5-day, 20 deg. CDAILY MX report only all year
002Solids, total suspendedDAILY MX report only all year
002Coliform, fecal generalDAILY MX report only all year
002FlowMO TOTAL report only all year
003BOD, 5-day, 20 deg. CDAILY MX report only all year
003Solids, total suspendedDAILY MX report only all year
003Coliform, fecal generalDAILY MX report only all year
003FlowMO TOTAL report only all year
004BOD, 5-day, 20 deg. CDAILY MX report only all year
004Solids, total suspendedDAILY MX report only all year
004Coliform, fecal generalDAILY MX report only all year
004FlowMO TOTAL report only all year
005BOD, 5-day, 20 deg. CDAILY MX report only all year
005Solids, total suspendedDAILY MX report only all year
005Coliform, fecal generalDAILY MX report only all year
005FlowMO TOTAL report only all year
006BOD, 5-day, 20 deg. CDAILY MX report only all year
006Solids, total suspendedDAILY MX report only all year
006Coliform, fecal generalDAILY MX report only all year
006FlowMO TOTAL report only all year
007BOD, 5-day, 20 deg. CDAILY MX report only all year
007Solids, total suspendedDAILY MX report only all year
007Coliform, fecal generalDAILY MX report only all year
007FlowMO TOTAL report only all year
008BOD, 5-day, 20 deg. CDAILY MX report only all year
008Solids, total suspendedDAILY MX report only all year
008Coliform, fecal generalDAILY MX report only all year
008FlowMO TOTAL report only all year
009BOD, 5-day, 20 deg. CDAILY MX report only all year
009Solids, total suspendedDAILY MX report only all year
009Coliform, fecal generalDAILY MX report only all year
009FlowMO TOTAL report only all year
010BOD, 5-day, 20 deg. CDAILY MX report only all year
010Solids, total suspendedDAILY MX report only all year
010Coliform, fecal generalDAILY MX report only all year
010FlowMO TOTAL report only all year
011BOD, 5-day, 20 deg. CDAILY MX report only all year
011Solids, total suspendedDAILY MX report only all year
011Coliform, fecal generalDAILY MX report only all year
011FlowMO TOTAL report only all year
012BOD, 5-day, 20 deg. CDAILY MX report only all year
012Solids, total suspendedDAILY MX report only all year
012Coliform, fecal generalDAILY MX report only all year
012FlowMO TOTAL report only all year
013BOD, 5-day, 20 deg. CDAILY MX report only all year
013Solids, total suspendedDAILY MX report only all year
013Coliform, fecal generalDAILY MX report only all year
013FlowMO TOTAL report only all year
A01BOD, 5-day, 20 deg. CDAILY MX report only all year
A01Solids, total suspendedDAILY MX report only all year
A01Nitrogen, ammonia total [as N]DAILY MX report only all year
A01Phosphorus, total [as P]DAILY MX report only all year
A01Coliform, fecal generalDAILY MX <= 400 #/100mL all year
A01Flow, totalMO TOTAL report only all year
B01Temperature, water deg. fahrenheitMO MAX report only all year
B01Oxygen, dissolved [DO]MO AV MN >= 5.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
B01Oxygen, dissolved [DO]MN WK AV >= 6 mg/L Mar, Apr, May, Jun, Jul
B01Oxygen, dissolved [DO]MN WK AV >= 4 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
B01Oxygen, dissolved [DO]DAILY MN >= 5 mg/L Mar, Apr, May, Jun, Jul
B01Oxygen, dissolved [DO]DAILY MN >= 3.5 mg/L Jan, Feb, Aug, Sep, Oct, Nov, Dec
B01pHMINIMUM >= 6 SU all year
B01pHMAXIMUM <= 9 SU all year
B01Alkalinity, total [as CaCO3]DAILY MX report only all year
B01Solids, total suspendedMO AVG <= 12 mg/L all year
B01Solids, total suspendedWKLY AVG <= 24 mg/L all year
B01Solids, total suspendedMO AVG <= 2002 lb/d all year
B01Solids, total suspendedWKLY AVG <= 4003 lb/d all year
B01Oil & GreaseDAILY MX report only all year
B01Nitrogen, total [as N]DAILY MX report only all year
B01Nitrogen, ammonia total [as N]WKLY AVG <= 3.8 mg/L Mar
B01Nitrogen, ammonia total [as N]WKLY AVG <= 3.8 mg/L Apr, May, Sep, Oct
B01Nitrogen, ammonia total [as N]WKLY AVG <= 4 mg/L Jun, Jul, Aug
B01Nitrogen, ammonia total [as N]WKLY AVG <= 634 lb/d Mar
B01Nitrogen, ammonia total [as N]WKLY AVG <= 634 lb/d Apr, May, Sep, Oct
B01Nitrogen, ammonia total [as N]WKLY AVG <= 667 lb/d Jun, Jul, Aug
B01Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Apr, May, Sep, Oct
B01Nitrogen, ammonia total [as N]MO AVG <= 1.6 mg/L Jun, Jul, Aug
B01Nitrogen, ammonia total [as N]MO AVG <= 4 mg/L Jan, Feb, Nov, Dec
B01Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Mar
B01Nitrogen, ammonia total [as N]DAILY MX <= 4.6 mg/L Apr, May, Sep, Oct
B01Nitrogen, ammonia total [as N]DAILY MX <= 4.6 mg/L Jun, Jul, Aug
B01Nitrogen, ammonia total [as N]DAILY MX <= 8.6 mg/L Jan, Feb, Nov, Dec
B01Nitrogen, ammonia total [as N]DAILY MX <= 8.4 mg/L Mar
B01Nitrogen, ammonia total [as N]MO AVG <= 250 lb/d Apr, May, Sep, Oct
B01Nitrogen, ammonia total [as N]MO AVG <= 267 lb/d Jun, Jul, Aug
B01Nitrogen, ammonia total [as N]MO AVG <= 667 lb/d Jan, Feb, Nov, Dec
B01Nitrogen, ammonia total [as N]MO AVG <= 250 lb/d Mar
B01Nitrogen, ammonia total [as N]DAILY MX <= 767 lb/d Apr, May, Sep, Oct
B01Nitrogen, ammonia total [as N]DAILY MX <= 767 lb/d Jun, Jul, Aug
B01Nitrogen, ammonia total [as N]DAILY MX <= 1434 lb/d Jan, Feb, Nov, Dec
B01Nitrogen, ammonia total [as N]DAILY MX <= 1401 lb/d Mar
B01Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
B01Nitrite + Nitrate total [as N]DAILY MX report only all year
B01Phosphorus, total [as P]MO AVG report only all year
B01Phosphorus, total [as P]DAILY MX report only all year
B01Phosphorus, dissolvedDAILY MX report only all year
B01Cyanide, total [as CN]DAILY MX report only all year
B01Cyanide, free [amenable to chlorination]DAILY MX report only all year
B01Chloride [as Cl]DAILY MX report only all year
B01Fluoride, total [as F]DAILY MX report only all year
B01Arsenic, total [as As]DAILY MX report only all year
B01Barium, total [as Ba]DAILY MX report only all year
B01Cadmium, total [as Cd]DAILY MX report only all year
B01Chromium, hexavalent [as Cr]DAILY MX report only all year
B01Chromium, total [as Cr]DAILY MX report only all year
B01Copper, total [as Cu]DAILY MX report only all year
B01Iron, total [as Fe]DAILY MX report only all year
B01Iron, dissolved [as Fe]DAILY MX report only all year
B01Lead, total [as Pb]DAILY MX report only all year
B01Manganese, total [as Mn]DAILY MX report only all year
B01Nickel, total [as Ni]DAILY MX report only all year
B01Silver, total [as Ag]DAILY MX report only all year
B01Zinc, total [as Zn]DAILY MX report only all year
B01Selenium, total [as Se]DAILY MX report only all year
B01Phenolics, total recoverableDAILY MX report only all year
B01Flow, in conduit or thru treatment plantMO AVG report only all year
B01Flow, in conduit or thru treatment plantDAILY MX report only all year
B01Chlorine, total residualDAILY MX <= .05 mg/L Jan, Feb, Mar, Apr, Nov, Dec
B01Chlorine, total residualDAILY MX <= .05 mg/L May, Jun, Jul, Aug, Sep, Oct
B01Mercury, total [as Hg]DAILY MX report only all year
B01Coliform, fecal generalDAILY MX <= 400 #/100mL May, Jun, Jul, Aug, Sep, Oct
B01BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
B01BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 20 mg/L all year
B01BOD, carbonaceous [5 day, 20 C]MO AVG <= 1668 lb/d all year
B01BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 3336 lb/d all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFSolids, total suspendedMO AVG report only all year
INFNitrogen, total [as N]DAILY MX report only all year
INFPhosphorus, total [as P]DAILY MX report only all year
INFFlow, in conduit or thru treatment plantMO AVG report only all year
INFFlow, in conduit or thru treatment plantDAILY MX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states