Caltrans Water Quality Planning Tool

The Water Quality Planning Tool was created to help planners and designers comply with environmental permits. It uses a map interface to find information based on a project’s location. This application is being updated for digital accessibility and will continue to function while updates are in progress.


Caltrans Water Quality Planning Tool

Center the crosshairs on an area of interest to get water quality information.

Use the buttons to the left to turn the map layers on and off.

Tables on watershed information, TMDLS, 303(d) listed water bodies, water quality objectives, and more will appear below the map.

Accessibility Assistance: Caltrans makes every attempt to ensure our documents are accessible. Due to variances between assistive technologies, there may be portions of this document which are not accessible. Where documents cannot be made accessible, we are committed to providing alternative access to the content. Should you need additional assistance, please contact Joshua Gualco at (916) 956-4732. For additional information visit