Oil wells dotted the landscape of Placentia, California, years past. Most have been capped and taken down. Only a few working oil wells remain. The state of California, offers map locations of the historic oil wells that have been decommissioned. There are three maps provided by the State of California, Department of Conservation that show the historic oil wells in Placentia.
Brea is Map 106 but includes northern parts of Placentia Map106
Yorba Linda is Map 107 and includes small east parts of Placentia. Map107
Placentia is Map 108 is the main map for Placentia. Map108