On a barren stretch of Monterey Bay, in a region desperate for fresh water, an oft-overlooked town has little say in whether a big water company can build a desalination operation right on its shore.

Here in Marina, where one-third of the town is low income and many speak little English, industrial facilities have long burdened the landscape. This desalination project would replace a century-old sand mine that has stripped shorebirds and rare butterflies of their home — and the community of an open space where anybody could cool off during a heat wave or enjoy a day by the sea.

Not a drop of this treated water — which would be piped to other cities, businesses and farmers in need — would even be for Marina.