Delta advocates are taking legal action against federal and state water agencies over the management of water quality standards in the Bay Delta. A coalition of environmental groups filed a complaint in federal court last week alleging the agencies violated numerous national and state environmental laws, including the Clean Water Act, the Endangered Species Act and the Delta Protection Act. The lawsuit was prompted by concerns expressed by fish biologists over the possible extinction of Salmon, Delta Smelt and other species in the near term. Delta groups blame drought related emergency measures taken by the State Water Board for putting Bay Delta species at risk. Pacifica’s Vic Bedoian reports from Fresno.