California Code, Government Code - GOV § 53126

Every local public agency may establish a nonemergency telephone system as provided in this article.  The digits “311” shall be dedicated as the nonemergency telephone number within the system.  Nonemergency “311” telephone systems shall be designed to provide a system similar to a “911” selective routing system, whereby the location of the initial call is determined to provide a coordinated uniform delivery system to meet the specified requirements of each local jurisdiction.  Every system shall be designed to allow the handling of emergency calls by the “911” emergency telephone system.