Seeing Cancer in Delaware County with PCIST

Prevailing summer winds typically blow north and/or west, carrying heavily polluted air from southeastern Delco's environmental justice zone to communities located in central, northern and western Delaware County
Prevailing winter winds typically blow from the southwest to the northeast, bringing pollution from the Delaware river front to Philadelphia
Additionally, on especially cold days during the winter, the phenomena of inversion traps pollution right at ground level where people live and work, as seen in the image of the Monroe (Delta Airlines) refinery on February 8, 2026

Southeast Delco Environmental Justice Zone

CCSR -SE Delco Region
CCSR -Tinicum
CCSR -Eddystone
CCSR -Chester City
CCSR -Trainer
CCSR -Marcus Hook

Wider Southeast Delco Region

CCSR-Aston
CCSR -Brookhaven
CCSR -Chester Twp
CCSR-Lower Chichester
CCSR -Parkside
CCSR -Ridley Park
CCSR -Ridley Twp
CCSR -Rutledge
CCSR -Upland
CCSR-Upper Chichester

Northeast Delco Region

CCSR -Aldan
CCSR -Clifton Heights
CCSR -Collingdale
CCSR -Colwyn
CCSR -Darby Borough
CCSR -Darby Twp
CCSR -East Landsdowne
CCSR -Folcroft
CCSR -Glenolden
CCSR -Landsdowne
CCSR -Millbourne
CCSR -Norwood
CCSR -Prospect Park
CCSR -Sharon Hill
CCSR -Upper Darby Twp
CCSR -Yeadon

Central Delco Region

CCSR -Media
CCSR -Middletown Twp
CCSR -Morton
CCSR -Nether Providence
CCSR -Rose Valley
CCSR -Springfield
CCSR -Swarthmore
CCSR -Upper Providence

Northern Delco Region

CCSR -Haverford
CCSR -Marple Twp
CCSR -Newtown Twp
CCSR -Radnor

Western Delco Region

CCSR -Bethel Twp
CCSR -Chadds Ford
CCSR -Chester Heights
CCSR -Concord Twp
CCSR -Edgmont Twp
CCSR -Thornbury