Clean Water Act discharge permit · NPDES ILR10ZF2E

620 OAK STREET SUBDIVISION, Hinsdale, IL: NPDES ILR10ZF2E discharge permit, effluent exceedances, inspections, penalties

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

620 OAK STREET SUBDIVISION, held by Oakley Home Builders, holds NPDES permit ILR10ZF2E. EPA’s file records it issued February 21, 2025 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 620 OAK STREET SUBDIVISION: its NPDES ID, its permit type and status, its dates, its address in Hinsdale, Illinois. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES ILR10ZF2E.

Identity

Facility as filed	620 OAK STREET SUBDIVISION
Permittee as filed	Oakley Home Builders
NPDES ID	ILR10ZF2E
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	February 21, 2025
Expiration date	August 31, 2028
Issuing agency	IEPA
Address	Hinsdale, IL 69521
Receiving water impaired	303(D) Listed
Subwatershed	Lower Salt Creek (HUC 071200040404)

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 ILR10ZF2E.

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 ILR10ZF2E.

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.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, ILR10ZF2E.

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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 ILR10ZF2E there.

Nearby on the register

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

The 620 OAK STREET SUBDIVISION permit is one of 7 storm water construction permits on EPA's NPDES register in Hinsdale, Illinois, and it sits among 103 NPDES permits in the Lower Salt Creek subwatershed. Of those 7 Hinsdale storm water construction permits, 57.1% were issued earlier than this one, and 0.0% of them have a violation on file, a figure this permit shares as it has no recorded violations of its own.