Colusa County Ground Water Protection Areas

Back to Ground Water Protection Area Locations


Locations of GWPAs can be accessed below in several formats. View the groundwater regulations and mitigation measures to understand and meet the requirements for the GWPAs.

Colusa County GWPA map, PDF

Colusa County shapefile, ZIP

The zip file includes eight files that comprise the shapefile. These files should be unzipped and remain together in a single directory. The shapefile may be opened with a GIS software such as ArcGIS, QGIS, or Google Earth.

List of GWPAs by Section (County, Meridian, Township, Range, Section [COMTRS])

The initial GWPAs became effective on May 27, 2004. The new GWPAs effective January 1, 2020 are marked with an asterisk *.

COMTRS Conditions
06M13N01W06 Runoff
06M14N01W32 Runoff
06M15N02W31* Runoff
06M15N03W36* Runoff