The largest desalination project in the US was approved days ago for construction in Carlsbad.
Poseidon Resources Corp. got final government approval Friday for its proposed $300 million desalination plant in Carlsbad. However, the legal challenges to the controversial plant have not ended.
The 3-0 vote by the State Lands Commission was the last regulatory endorsement Poseidon needed to build the plant.
Situated in coastal Carlsbad, the plant would be capable of making 50 million gallons of fresh water a day from sea water, 9 percent of the county's total water consumption.
This decision is being challenged in court due to concerns from Surfrider Foundation and San Diego Coastkeeper that the project will negatively impact local water bodies due to its water intake and salt waste.
The four primary water utilities in the Bay Area - Contra Costa, East Bay, Santa Clara and San Francisco - are in the
exploration phase of desalination. Marin is separately exploring a desalination project.
Desalination is not inherently problematic. Given population pressures and the
declining water supply expected as a consequence of climate change it is very likely that desalination will become a fixture of California's water supply.
However, desalination is expensive, energy intensive and produces toxic brine. This is leading to a lot of debate as the state begins to
grapple with the current drought.
“Marin’s desalination plant would cost $2,000 an acre foot,” said Peter Gleick, president of the Pacific Institute for Studies in Development, Environment and Security in Oakland. “Conservation can be had for a couple hundred dollars an acre foot.”
Detailed in the
Sierra Club's recent report, a number of peninsula cities have implemented measures such as use of recycled water or low-flow toilet replacement programs. Such measures, still only begun to be taken overall, can save millions of gallons of drinking water. One such example is Redwood City which expects to save over 100 million gallons of water per year by
replacing 12,250 older high water-use toilets over three-years. In addition, Redwood City has taken additional measures.
Redwood City began to require in August that new developments include dual plumbing that recycles water as well as providing it fresh. The city’s recycled water system saves 50 million gallons of drinking water annually and the city hopes to save 300 million by 2010. Officials don’t worry that such requirements will discourage businesses from coming to Redwood City.
It is urgent to pursue water efficiency measures before embarking on costlier solutions.