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Clean Water Act discharge permit · NPDES PAD150078

THE HILLS AT THORNDALE WOODS, Downingtown, PA: NPDES PAD150078 discharge permit, effluent exceedances, inspections, penalties

THE HILLS AT THORNDALE WOODS, held by Southdown Properties, Inc., holds NPDES permit PAD150078. EPA’s file records it issued April 4, 2018 and expiring April 3, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for THE HILLS AT THORNDALE WOODS: its NPDES ID, its permit type and status, its dates, its address in Downingtown, Pennsylvania. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES PAD150078.

Identity

Facility as filedTHE HILLS AT THORNDALE WOODS
Permittee as filedSouthdown Properties, Inc.
NPDES IDPAD150078
Permit statusEffective
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedApril 4, 2018
Expiration dateApril 3, 2023
Issuing agencyPADEP
AddressDowningtown, PA 19335
Receiving water impaired303(D) Listed
SubwatershedBeaver Creek (HUC 020402050102)

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

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES PAD150078.

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES PAD150078.

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, PAD150078.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

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 PAD150078 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.