California Code, Health and Safety Code - HSC § 8118

A cemetery supplied with disinfected tertiary treated recycled water that installs a hose bib in an area subject to access by the general public shall post signage and labeling visible to the general public that the water is nonpotable. The signage and labeling shall be regularly inspected by the water purveyor, as defined in Section 512 of the Water Code, to ensure that the general public has proper notice of this fact.