Amends existing law to revise provisions regarding the delivery of water within subdivisions and certain civil actions and to provide for consideration of ground water when amending, repealing, or adopting a comprehensive plan.

This legislation addresses the use of exempt domestic wells in subdivisions. In particular, the legislation: 1) requires the use of shared or public water systems in subdivisions with 10 or more lots (where each lot is 5 acres or smaller; 2) requires that surface water being used for irrigation on land must continue to be used for irrigation when that land is developed, and 3) authorizes a county to consider water supply conditions in the comprehensive planning process.