Water Quality Planning Tool

This Water Quality Planning Tool was designed for Caltrans to use applicable water quality standards while developing strategies for achieving regulatory compliance with storm water permits.

Using the tool
The information on water quality is divided in to hydrologic sub-areas (HSAs). To find a HSA use the HSA name or post-mile of the road in an HSA.
HSA name or number
Post-Miles
Note: The tool has been updated with the 2006 303(d) list.

California State University Sacramento Training Research