Cal. WAT § 31144.5

(a) Whenever, in the opinion of the board of directors, the public interest or convenience may require, the board of directors may undertake any work necessary or incidental to the prevention, mitigation, abatement, or control of water pollution from public, combined, or private onsite waste water disposal systems, or to repair damages resulting therefrom.

(b) For purposes of this section, “water pollution” means actual or threatened pollution to the San Lorenzo River and its tributaries, ground and surface waters of the district, and water flowing into, through, or originating within watercourses, both natural and artificial, within the district.

(c) The work may be performed on private property with the prior written consent of the owner thereof, if the board of directors of the district, in the resolution of intention, determines that it is in the public interest to do so.

(d) The work or improvement shall be done and the cost thereof assessed and collected in accordance with the procedures of the Improvement Act of 1911 (Division 7 (commencing with Section 5000) of the Streets and Highways Code), the Municipal Improvement Act of 1913 (Division 12 (commencing with Section 10000) of the Streets and Highways Code), or the Improvement Bond Act of 1915 (Division 10 (commencing with Section 8500) of the Streets and Highways Code).