San Diego County supervisors have formally weighed in on a contentious — and increasingly costly — plan by two rural water districts to break away from a regional authority they say is too expensive. The county board voted 3-1 last week in favor of a recommendation from Supervisor Joel Anderson to support state legislation that would require approval by a majority of all voters within the regional water authority — rather than only those residents of a breakaway district. … Anderson was joined by Supervisors Nora Vargas and Terra Lawson-Remer in supporting the recommendation, which carries no specific authority in the California legislature. Supervisor Jim Desmond opposed the plan.