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Water Quality Improvement
A major objective in EPA's work to restore the San Francisco Bay Delta Watershed is to improve water quality by reducing or preventing contamination of rivers and streams, using a watershed approach.
EPA has worked with local partners to reduce the pesticide diazinon levels in the Sacramento and Feather River systems. As a result, levels of diazinon have dropped below water quality criteria on 79 miles of these rivers. Selenium loads have been reduced by two-thirds since 1996 in Salt Slough and Grasslands Marsh through water management improvments and redirecting contaminated flow.