California Department of Transportation

Storm Water

The Office of Storm Water Management - Design (OSWM) emphasizes stewardship of California's water resources by providing:

  • Technical assistance to designers on storm water pollution control implementation.
  • Assistance to designers to assure compliance with Caltrans' statewide NPDES permit.
  • Guidance and training for the implementation of appropriate Storm Water Best Management Practices (BMPs).

This page last updated July 19, 2011