Drinking Water Source Assessment and Protection Program

Delineation Mapping Tool


The DWSAP Ground Water Interface allows the visualization of Calculated Fixed Radius delineations for California drinking water sources. Dynamic visualizations of well protection zones can be done on specific sources. The drinking water sources are shown superimposed upon USGS Digital Raster Graphics (DRG) - also known as the USGS 7.5 minute quadrangles.

Use this tool to:

  1. Find a USGS map location
  2. Locate a drinking water source
  3. Determine if the source has been positioned using a GPS
  4. Draw the protection zones around the source
  5. Print the required map for the Drinking Source Water Assessment
  6. Help determine the Possible Contaminating Activities of a source

More information about the Drinking Water Source Assessment Program can be obtained from the  California Department of Health Services (DHS).

To download the instructions for the New Mapping Tool, right click the link below.  You must have PowerPoint to read the document.


Using the New Mapping Tool  (16.4mb)