California Health & Safety Codes Regarding Fluoridation

Section 116410.

(a) In order to promote the public health through the protection and maintenance of dental health, the department shall adopt regulations pursuant to Chapter 3.5 (commencing with Section 11340) of Division 3 of Title 2 of the Government Code, requiring the fluoridation of public water systems. By July 1, 1996, each public water system with at least 10,000 services connections shall provide to the department an estimate of the total capital costs to install fluoridation treatment. The regulations adopted by the department shall take effect on January 1, 1997.

(b) The regulations shall include, but not be limited to, the following:

(1) Minimum and maximum permissible concentrations of fluoride to be maintained by fluoridation of public water systems.

(2) The requirements and procedures for maintaining proper concentrations of fluoride, including equipment, testing, recordkeeping, and reporting.

(3) Requirements for the addition of fluorides to public water systems in which the natural level of fluorides is less than the minimum level established in the regulations.

(4) A schedule for the fluoridation of public water systems with at least 10,000 service connections, based on the lowest capital cost per connection for each system.

There's more to read, link to the Cal Government site, check the box for Health & Safety Codes and use the search keyword 116410.