Contra Costa County Vector Control District
Information on mosquitoes (West Nile Virus), rats/mice, bees/yellow jackets, etc.
http://www.contracostamosquito.com/

Delta Household Hazardous Waste Collection Facility
Information on where to take you household chemicals 
https://www.deltadiablo.org/household-hazardous-waste

Pacific Gas & Electric
Information on how to report streetlight outages, rebates, energy programs, etc.
http://www.pge.com/

California Landlord Tenant Rights [PDF] - 2019
A Guide to Residential Tenants’ and Landlords’ Rights and Responsibilities to include changes to landlord-tenant laws made by the California Legislature. 
https://www.achhd.org/documents/California-Tenants-Guide.pdf

Pacific Community Services, Inc.
A private non-profit housing agency serving Contra Costa County which assists clients with fair housing counseling, default and delinquency counseling, and tenant / landlord disputes

https://www.publichousing.com/details/pacific_community_services_inc._94565-2245