Special Districts
| Affiliate Name | Participation Since |
|---|---|
| Antelope Valley Transit Authority | 9/8/2010 |
| Arden Manor Recreation and Park District | 7/1/2017 |
| Bay Area Regional Interoperable Communications System | 12/15/2011 |
| Conservation and Liquidation Office California Department of Insurance | 6/30/1997 |
| Morongo Basin Healthcare District | 7/1/2015 |
| North County Transit District | 7/1/2015 |
| Regional Government Services Authority | 7/1/2020 |
| San Bernardino County Transportation Authority | 7/1/2020 |
| San Elijo JPA Administration | 1/1/2011 |
| San Gorgonio Memorial Hospital | 1/1/2019 |
| Sausalito-Marin Sanitary District | 8/1/2003 |
| South Bay Regional Public Communications Authority | 7/1/2019 |
| South Tahoe Public Utilities District | 1/1/2010 |
| State of California Department of Water Resources | 6/23/2011 |
| Western Contra Costa Transit District | 7/1/2006 |