ALTO ICP LLC

NPDES permit IL0002909 · Minor NON-POTW · effective, expires 2029-05-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
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.

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

10values over a limit
8required values missing, on 1 form(s)
0of 198 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (4), BOD, 5-day, 20 deg. C (3), pH (2).

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among IL permits in EPA's filings — check your permit).

Limits in force (82)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO MAX <= 96.6 deg F Jan, Feb, Mar, Dec
001Temperature, water deg. fahrenheitMO MAX report only Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, 5-day, 20 deg. C30DA AVG <= 20 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 40 mg/L all year
001BOD, 5-day, 20 deg. C30DA AVG <= 1060 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 2121 lb/d all year
001pHMO MIN >= 6 SU all year
001pHMO MAX <= 9 SU all year
001Solids, total suspended30DA AVG <= 25 mg/L all year
001Solids, total suspendedDAILY MX <= 50 mg/L all year
001Solids, total suspended30DA AVG <= 1326 lb/d all year
001Solids, total suspendedDAILY MX <= 2652 lb/d all year
001Chromium, total [as Cr]QRTR AVG report only Mar, Jun, Sep, Dec
001Chromium, total [as Cr]QB report only Mar, Jun, Sep, Dec
001Copper, total [as Cu]QRTR AVG report only Mar, Jun, Sep, Dec
001Copper, total [as Cu]QB report only Mar, Jun, Sep, Dec
001Nickel, total [as Ni]QRTR AVG report only Mar, Jun, Sep, Dec
001Nickel, total [as Ni]QB report only Mar, Jun, Sep, Dec
001Zinc, total [as Zn]QRTR AVG report only Mar, Jun, Sep, Dec
001Zinc, total [as Zn]QB report only Mar, Jun, Sep, Dec
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= .05 mg/L all year
002Temperature, water deg. fahrenheitMO MAX report only all year
002pHMO MIN >= 6 SU all year
002pHMO MAX <= 9 SU all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualDAILY MX <= .05 mg/L all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Chlorine, total residualDAILY MX <= .05 mg/L all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Chlorine, total residualDAILY MX <= .05 mg/L all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Chlorine, total residualDAILY MX <= .05 mg/L all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Chlorine, total residualDAILY MX <= .05 mg/L all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Chlorine, total residualDAILY MX <= .05 mg/L all year
010Flow, in conduit or thru treatment plantMO AVG report only all year
010Flow, in conduit or thru treatment plantDAILY MX report only all year
010Chlorine, total residualDAILY MX <= .05 mg/L all year
011Flow, in conduit or thru treatment plantMO AVG report only all year
011Flow, in conduit or thru treatment plantDAILY MX report only all year
011Chlorine, total residualDAILY MX <= .05 mg/L all year
012Flow, in conduit or thru treatment plantMO AVG report only all year
012Flow, in conduit or thru treatment plantDAILY MX report only all year
012Chlorine, total residualDAILY MX <= .05 mg/L all year
013Flow, in conduit or thru treatment plantMO AVG report only all year
013Flow, in conduit or thru treatment plantDAILY MX report only all year
013Chlorine, total residualDAILY MX <= .05 mg/L all year
014Flow, in conduit or thru treatment plantMO AVG report only all year
014Flow, in conduit or thru treatment plantDAILY MX report only all year
014Chlorine, total residualDAILY MX <= .05 mg/L all year
015Flow, in conduit or thru treatment plantMO AVG report only all year
015Flow, in conduit or thru treatment plantDAILY MX report only all year
015Chlorine, total residualDAILY MX <= .05 mg/L all year
016Flow, in conduit or thru treatment plantMO AVG report only all year
016Flow, in conduit or thru treatment plantDAILY MX report only all year
016Chlorine, total residualDAILY MX <= .05 mg/L all year
017Flow, in conduit or thru treatment plantMO AVG report only all year
017Flow, in conduit or thru treatment plantDAILY MX report only all year
017Chlorine, total residualDAILY MX <= .05 mg/L all year
018Flow, in conduit or thru treatment plantMO AVG report only all year
018Flow, in conduit or thru treatment plantDAILY MX report only all year
018Chlorine, total residualDAILY MX <= .05 mg/L all year
019Flow, in conduit or thru treatment plantMO AVG report only all year
019Flow, in conduit or thru treatment plantDAILY MX report only all year
019Chlorine, total residualDAILY MX <= .05 mg/L all year
A01BOD, 5-day, 20 deg. C30DA AVG <= 20 mg/L all year
A01BOD, 5-day, 20 deg. CDAILY MX <= 40 mg/L all year
A01pHMO MIN >= 6 SU all year
A01pHMO MAX <= 9 SU all year
A01Solids, total suspended30DA AVG <= 25 mg/L all year
A01Solids, total suspendedDAILY MX <= 50 mg/L all year
A01Flow, in conduit or thru treatment plantMO AVG report only all year
A01Flow, 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