Among the problems plaguing San Francisco Bay are the prospect of RED TIDES. Just two summers ago, these algae blooms killed thousands of fish in the Bay. Red tides happen when there are certain conditions ... for example, warm water that's full of tiny particles pumped out of WASTEWATER plants.

So . . . the regional water board is coming out with stronger rules this summer that will force wastewater agencies to expand how they treat sewage. One plant in the East Bay is trying to get ahead of the game, as KQED's Ezra David Romero explains.