WPD Hayward, CA Business Information 1739 Sabre StreetHayward, CA 94545Business Hours: 8:00 am – 5:00 pmhttp://www.teamwpd.com Telephone Numbers Phone: (510) 732-0100 Fax: Fax: (510) 732-0155 Serving the San Francisco Bay area and the northern California coast, from San Luis Obispo to the Oregon border.