“On-site and off-site recycling are two choices available for managing used and acquiring recycled antifreeze. On-site recycling equipment can be leased or purchased through several California distributors. For a list of California companies that provide recycling services, see the California Integrated Waste Management Board’s (CIMWB) Household Hazardous Waste Web site; for equipment and supplies, please peruse the California Department of Toxic Substances Control’s (DTSC) Vehicle Service and Repair Program Equipment and Supplies Directory.
Recycled-content antifreeze can be purchased throughout California through distributors that recycle it. Vendors of both regular and extended-life recycled-content antifreeze can be found in the CIWMB’s Recycled-Content Product Directory.”
Read all about it here