NORTHWESTERN UNIVERSITY

NPDES permit IL0066541 · Minor NON-POTW · administratively continued, expires 2018-07-31 · 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.

This permit expired on 2018-07-31 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

0values over a limit
0required values missing, on 0 form(s)
2of 24 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (26)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG <= 45 deg F Jan, Feb, Mar
001Temperature, water deg. fahrenheitMO MAX <= 55 deg F Apr
001Temperature, water deg. fahrenheitMO MAX <= 60 deg F May, Nov
001Temperature, water deg. fahrenheitMO MAX <= 70 deg F Jun
001Temperature, water deg. fahrenheitMO MAX <= 80 deg F Jul
001Temperature, water deg. fahrenheitMO MAX <= 80 deg F Aug, Sep
001Temperature, water deg. fahrenheitMO MAX <= 65 deg F Oct
001Temperature, water deg. fahrenheitMO MAX <= 50 deg F Dec
001pHMO MIN >= 7 SU all year
001pHMO MAX <= 9 SU 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
002Temperature, water deg. fahrenheitMO AVG <= 45 deg F Jan, Feb, Mar
002Temperature, water deg. fahrenheitMO MAX <= 55 deg F Apr
002Temperature, water deg. fahrenheitMO MAX <= 60 deg F May, Nov
002Temperature, water deg. fahrenheitMO MAX <= 70 deg F Jun
002Temperature, water deg. fahrenheitMO MAX <= 80 deg F Jul
002Temperature, water deg. fahrenheitMO MAX <= 80 deg F Aug, Sep
002Temperature, water deg. fahrenheitMO MAX <= 65 deg F Oct
002Temperature, water deg. fahrenheitMO MAX <= 50 deg F Dec
002pHMO MIN >= 7 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

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