Cal. Health & Safety Code § 115843.5

(a) In the Canyon Lake Reservoir, recreational uses shall not include recreation in which any participant has bodily contact with the water, unless both of the following conditions are satisfied:
1. (1) The water subsequently receives complete water treatment, in compliance with all applicable department regulations, including coagulation, flocculation, sedimentation, filtration, and disinfection, before being used for domestic purposes. The disinfection shall include, but is not limited to, an advanced technology capable of inactivating organisms, including, but not limited to, viruses, cryptosporidium, and giardia, to levels that comply with department regulations. The treatment shall include, but need not be limited to, ozonation or ultra violet disinfection. The treatment shall, at a minimum, comply with all state laws and department regulations and all federal laws and regulations, including, but not limited to, the federal Environmental Protection Agency Long-Term 2 Enhanced Surface Water Treatment regulations. Nothing in this division shall limit the state or the department from imposing more stringent treatment standards than those required by federal law.
2. (2) The reservoir is operated in compliance with regulations of the department.
(b) The recreational use may be subject to additional conditions and restrictions adopted by the entity operating the water supply reservoir or required by the department, if those conditions and restrictions do not conflict with regulations of the department, and are required to further protect or enhance the public health and safety.
(c) The Elsinore Valley Municipal Water District shall, by January 1, 2007, file a report with the Legislature on the recreational uses at Canyon Lake Reservoir and the water treatment program. The report shall include, but not necessarily be limited to, all of the following information:
1. (1) Participation in watershedwide activities to improve water quality in the Canyon Lake Reservoir.
2. (2) Annual results of volatile organic compounds, general minerals, and nutrients testing results provided to the department.
3. (3) A summary of available monitoring in the Canyon Lake Reservoir provided to the department for giardia and cryptosporidium.
4. (4) The most current sanitary survey of the watershed and water quality monitoring plan.
5. (5) A summary of monthly reports provided to the department on intake water bacteria and water quality.
6. (6) A summary of monthly reports provided to the department on water usage in Canyon Lake Reservoir.
7. (7) An evaluation of the impact on source water quality due to recreational activities on the Canyon Lake Reservoir, including any microbiological monitoring, and a summary of monthly reports provided to the department on treatment plant performance.
8. (8) A summary of activities between Elsinore Valley Municipal Water District and the Canyon Lake Property Owners Association for operation of recreational uses and facilities in a manner that optimizes the water quality.
9. (9) The reservoir management plan and the operations plan.
10. (10) The annual water quality reports submitted to consumers each year.
(d) If there is a change in operation of the treatment facility or a change in the quantity of water to be treated at the treatment facility, the department may require the Elsinore Valley Municipal Water District to file a report that includes, but is not limited to, the information required pursuant to subdivision (c), and the district shall demonstrate to the satisfaction of the department that water quality will not be adversely affected.