Southern California gets about a third of its water from the Sacramento-San Joaquin Bay Delta east of San Francisco. But deliveries aren’t always reliable because ecological concerns often slow the pumps conveying the water southward.
The state wants to build two new conveyance tunnels under the delta to reduce ecological harm and increase reliability, but the plan is in trouble for lack of funding. Now Southern California’s biggest water agency — the Metropolitan Water District — is offering to help save the project. And its plan would cost ratepayers more.