California Code, Health and Safety Code - HSC § 6520.9

It may construct, maintain, and operate such pipelines or other works as may be necessary to conserve and put to beneficial use any water or recycled effluent recovered from the operation of the wastewater system, plant, or works, by sale or disposition for agricultural or industrial purposes, or by discharging or spreading the water or recycled effluent in such a manner as to percolate into the underground gravels and replenish the natural water resources.

The addition of this section made at the 1972 Regular Session of the Legislature does not constitute a change in, but is declaratory of, the existing law.