Welcome to the Department of Pesticide Regulation

Ground Water Protection Area Lists

Back to Regulations

A ground water protection area (GWPA) is defined as an area of land that is vulnerable to the movement of pesticides to ground water according to either leaching or runoff processes. The table below provides links to lists for those counties that have one or more GWPAs. (Counties not listed have no GWPAs.)



Click on County Name to View List
Butte Colusa Contra Costa Fresno
Glenn Kern Kings Los Angeles
Madera Mendocino Merced Modoc
Monterey Orange Placer Riverside
Sacramento San Bernardino San Joaquin San Luis Obispo
Shasta Siskiyou Solano Sonoma
Stanislaus Sutter Tehama Tulare
Ventura Yolo Yuba