There are many outlets to recycle your leftover paint. The Riverside County Department of Waste Resources has partnered with PaintCare, an industry sponsored paint stewardship non-profit program established to manage the reuse, recycling and proper disposal of unused architectural paint.
PaintCare continues to establish numerous drop-off sites at paint retail stores, government-run household hazardous waste facilities, and other locations across California. When these sites are part of PaintCare, they accept program products (primarily latex and oil based paint) from all residents and certain businesses.