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Volunteer Paul Bareno’s yellow shirt makes him easy to see as he helps clean up a stretch of San Diego riverbed. “We were here, I’m guessing, we were here about two months ago, maybe less. And we got it pretty clean. Yeah we hit the same amount of places regularly,” said Bareno. There is plenty to clean up. There are clothes, food wrappers and at one campsite, long strips of yellow plastic tubing that’s supposed to be a temporary sandbag. None of it is surprising.

State officials are under fire for not keeping up with legal requirements to track waterways that are polluted or have other problems that affect using those waterways for activities including fishing and swimming. San Diego Coastkeeper is one of three clean water groups suing the state in an effort to get better water quality. Coastkeeper Matt O’Malley said the groups want to make sure the state complies with federal clean water rules by doing a better job of identifying and listing impaired waterways that don’t meet the federal guidelines.

With Tijuana and other rapidly growing coastal cities heavily dependent on the Colorado River, Baja California urgently needs to find new water sources. Baja California Gov. Francisco Vega de Lamadrid’s administration has offered a solution: Build the largest desalination plant in the Western Hemisphere, enough to ensure a supply for decades to come. But plans for the reverse-osmosis facility in Rosarito Beach, a project that at full capacity would desalinate 100 million gallons daily, have come under unprecedented scrutiny at a politically sensitive moment.