California’s Border Protection Stations (BPS) are the first line of defense in our pest exclusion efforts. At these stations, vehicles are inspected for commodities infested with invasive species. California established its first agricultural inspection stations in the early 1920s. Today there are 16 of these facilities located on the major highways entering the State (see interactive map). At these stations, vehicles and commodities are checked to ensure they are pest free and meet all regulatory requirements.