Cal. SHC § 2808.5

This division does not apply to proceedings commenced before or after January 1, 1985, for the construction or acquisition, or both, of facilities for the production, treatment, storage, and distribution of water, which supply potable water for domestic, municipal, commercial, or industrial use, including the acquisition of rights-of-way and easements necessary in connection with the facilities, when the proceedings have been recommended by the health officer of the city or county in which the proceedings are instituted as necessary as a health measure, if the recommendation is submitted in writing and included in the minutes of the legislative body conducting the proceedings, and the necessity is found to exist by a resolution adopted by the affirmative vote of four-fifths of the members thereof. The findings and determinations made by the legislative body, pursuant to this section, is final and conclusive upon all persons in the absence of actual fraud.