Success Spotlight: San Joaquin River
EPA's Clean Water Act Section 319 Program provides funding for restoration of nonpoint source-impaired water bodies. This week's success spotlight shines on San Joaquin River in California. Widespread use of the pesticide diazinon resulted in elevated concentrations toxic to aquatic life, and several portions of San Joaquin River was placed on California's list of impaired waters in 1992. Watershed stakeholders implemented agricultural best management practices in orchards, such as biological methods to replace chemical farming practices, maintenance of natural areas and hedgerows to provide habitat for beneficial insects to control pests. Partners also initiated discharge regulations and a diazinon total maximum daily load. As a result, pesticide concentrations decreased, prompting California to remove two river portions, the 3-mile Stanislaus River to Delta segment and the 14-mile Bear Creek to Mud Slough segment, from the state's list of impaired waters for diazinon in 2010. Click here for more information.
Source: US EPA