California Code, Public Resources Code - PRC § 5819.4

(a) Acquiring agricultural, forest, or grazing land, or other working landscapes, to prevent conversion of that land to uses that could decrease water quality in the region and degrade habitat values, or to convert that land to uses that could improve water quality in the region and habitat.

(b) Acquiring land adjacent to or affecting rivers, streams, lakes, or wetlands, that, if not protected, could lead to a decrease in water quality in the region.

(c) Purchasing water rights that will protect both water quality and in stream flow, in the region, for resource protection.

(d) Acquiring land that mitigates or prevents current or anticipated management practices that contribute to water quality degradation in the region.