CATERPILLAR, INC.

NPDES permit IL0024163 · Minor NON-POTW · effective, expires 2030-09-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

1values over a limit
0required values missing, on 0 form(s)
0of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Chlorine, total residual (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 (20)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 60 mg/L all year
001BOD, 5-day, 20 deg. C30DA AVG <= 2.63 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 42 lb/d all year
001pHMO MIN >= 6.5 SU all year
001pHMO MAX <= 9 SU all year
001Solids, total suspended30DA AVG <= 37 mg/L all year
001Solids, total suspendedDAILY MX <= 74 mg/L all year
001Solids, total suspended30DA AVG <= 4.63 lb/d all year
001Solids, total suspendedDAILY MX <= 52 lb/d all year
001Oil & Grease30DA AVG <= 15 mg/L all year
001Oil & GreaseDAILY MX <= 30 mg/L all year
001Oil & Grease30DA AVG <= 1.88 lb/d all year
001Oil & GreaseDAILY MX <= 21 lb/d all year
001Iron, total [as Fe]30DA AVG <= 2 mg/L all year
001Iron, total [as Fe]DAILY MX <= 4 mg/L all year
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
001Coliform, fecal generalDAILY 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