Keep Pennsylvania Beautiful’s (KPaB) 2012 Survey of Philadelphia found 296 illegal dump site with an estimated 559 tons of visible debris. (Report pdf)
While a City-wide problem, this KPaB map shows that a few neighborhoods have a disproportionate number of dump sites.
Here is a link to an interactive version of the KPaB illegal dump sites.
Here is a link to an Excel CSV file that has the illegal site locations and latitude – longitude for mapping. (Philly_sites_lat_long.csv)