How To Use This Website

This site contains a wealth of information on the soils of Napa County. Browsing through the menus, you will find a variety of maps, written descriptions, and interpretive tables with detailed information on the 83 soil mapping units. Further helpful information on natural resources topics can be accessed as well.

The site has the same structure as the printed soil survey report with sections and subsections, in the form of a dynamic menu or table of contents.  To expand the main section menus, click the 's.  The subsections will become visible.  To close or collapse the section menus, click the 's.  

The typical soil survey user may simply want to locate their site on a soils map and go directly to the mapping unit description for that soil. To do this, click on "Introduction-Index to Map Sheets". At the following page, click on "Index to Map Sheets". This will take you to a gridded base map of Napa County, comprised of 47 numbered map sheets. Find your general location, and click on the appropriate map sheet for your site. Once the map has fully loaded on the page, use the scroll bars to move to your location. When you find your site, simply place the cursor on the 3-digit soil map unit number and click. This will take you to the description page. Scroll up or down on that page for a description of the representative soil profile for that soil series. 

If you are interested in printing maps, click "Introduction-Index to Map Sheets", then "Download Map Sheets".   This will take you to a gridded base map of Napa County, comprised of 47 numbered map sheets. That page includes instructions to download a map sheet. Load the file into any PC application from which you can print graphics.  You may also view the map sheet and print from directly from your browser. 

If you’re only interested in a soils description, skip the map steps and click on "Guide to Mapping Units" from the menu on the left, then click on the desired soil series appearing on the table page that follows.

Specific topics listed below can be found by clicking on the following menu items: