The Philadelphia Department of Public Health offers a data dashboard where you can find citywide statistics relating to gun violence and its upstream factors, like poverty and other social determinants of health. Firearm suicide data are also available.
Data & Fact Sheets
Pennsylvania Crash Information Tool
The Pennsylvania Department of Transportation provides crash statistics and reports for the state and for specific counties and municipalities. Excellent sources of data for transportation-related injuries.
Pennsylvania Health Statistics
The Pennsylvania Department of Health has data dashboards and reports for many health-related issues. It is a great resource if you're looking for local data to back up your claims.