CABOT CORPORATION

NPDES permit IL0004375 · Minor NON-POTW · effective, expires 2028-09-30 · 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

0values over a limit
0required values missing, on 0 form(s)
0of 22 forms filed late

Last period with anything received: 2026-07-31.

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 (28)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO MAX <= 63 deg F Jan, Feb, Mar, Dec
001Temperature, water deg. fahrenheitMO MAX <= 93 deg F Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001pHMO MIN >= 6 SU all year
001pHMO MAX <= 9 SU all year
001Solids, total suspended30DA AVG <= 15 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Nitrite + Nitrate total [as N]QB report only Jan, Apr, Jul, Oct
001Iron, total [as Fe]QB report only Jan, Apr, Jul, Oct
001Aluminum, total [as Al]QB report only Jan, Apr, Jul, Oct
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
B01BOD, 5-day, 20 deg. C30DA AVG <= 10 mg/L all year
B01BOD, 5-day, 20 deg. CDAILY MX <= 20 mg/L all year
B01BOD, 5-day, 20 deg. C30DA AVG <= 1.25 lb/d all year
B01BOD, 5-day, 20 deg. CDAILY MX <= 2.5 lb/d all year
B01pHMO MIN >= 6 SU all year
B01pHMO MAX <= 9 SU all year
B01Solids, total suspended30DA AVG <= 12 mg/L all year
B01Solids, total suspendedDAILY MX <= 24 mg/L all year
B01Solids, total suspended30DA AVG <= 1.5 lb/d all year
B01Solids, total suspendedDAILY MX <= 3 lb/d all year
B01Oil and grease30DA AVG <= 15 mg/L Jan, Apr, Jul, Oct
B01Oil and greaseDAILY MX <= 30 mg/L Jan, Apr, Jul, Oct
B01Oil and grease30DA AVG <= 1.88 lb/d Jan, Apr, Jul, Oct
B01Oil and greaseDAILY MX <= 3.75 lb/d Jan, Apr, Jul, Oct
B01Flow, in conduit or thru treatment plantMO AVG report only all year
B01Flow, 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