Clean Water Act discharge permit · NPDES ILR10ZBXP

400 AREA ROADWAY IMPROVEMENTS PHASE 2 AND 3 (KEARNEY AND BLUFF ROADS), Lemont, IL: NPDES ILR10ZBXP discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance

400 AREA ROADWAY IMPROVEMENTS PHASE 2 AND 3 (KEARNEY AND BLUFF ROADS), held by UChicago Argonne, LLC, holds NPDES permit ILR10ZBXP. EPA’s file records it issued September 22, 2023 and expiring August 31, 2028. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for 400 AREA ROADWAY IMPROVEMENTS PHASE 2 AND 3 (KEARNEY AND BLUFF ROADS): its NPDES ID, its permit type and status, its dates, its address in Lemont, Illinois. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES ILR10ZBXP.

Identity

Facility as filed	400 AREA ROADWAY IMPROVEMENTS PHASE 2 AND 3 (KEARNEY AND BLUFF ROADS)
Permittee as filed	UChicago Argonne, LLC
NPDES ID	ILR10ZBXP
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Construction stormwater
Issued	September 22, 2023
Expiration date	August 31, 2028
Issuing agency	IEPA
Address	Lemont, IL 60439
Subwatershed	Sawmill Creek (HUC 071200040704)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

0Pollutants on file
0Under a numeric limit
0With a violation of any kind
0With an effluent exceedance

EPA’s limits and effluent violation files hold no pollutant row for NPDES ILR10ZBXP.

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES ILR10ZBXP.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID ILR10ZBXP there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers Clean Water Act NPDES permit ILR10ZBXP for 400 AREA ROADWAY IMPROVEMENTS PHASE 2 AND 3 (KEARNEY AND BLUFF ROADS) in Lemont, IL, held by UChicago Argonne, LLC, under a construction stormwater program. The register lists the permit as Effective, with a Minor Discharger class, 0 pollutants under a numeric limit, and 400 pollutants with an effluent exceedance. The permit was issued September 22, 2023 and expires August 31, 2028, as of the September 15, 2026 load date.