This document summarizes several porous pavement projects completed by Onondaga County to manage stormwater runoff. It outlines case studies for four parking lots that used designs with porous asphalt and concrete to infiltrate runoff on-site. The case studies describe the design components, costs, estimated runoff reductions, and lessons learned. Key findings include the projects achieved runoff reductions at costs of $0.38 to $0.57 per gallon, and that proper construction and maintenance are important for ensuring the porous pavements function as intended over time.