Biohazard and Crime Scene Remediation in Penngrove, CA

Penngrove is a census-designated place in Sonoma County, California, situated between Petaluma and Cotati at the foot of the western flank of Sonoma Mountain, in the North Bay subregion of the San Francisco Bay Area.

The town grew up on land from the Rancho Cotate grant, made to Captain Juan Castaneda by the Mexican government in 1844; the first European settlers arrived in 1852.

Penngrove takes its name from a historic grove called Penn's Grove, and in 1907 the U.S. Post Office Department officially shortened the name to the single word Penngrove.

By 1870 the San Francisco and North Pacific Railroad laid track through Penngrove, which became a freight station on the Northwestern Pacific Railroad and a shipping point for local farms and stone quarries.

At the end of the 19th century, about 200 men worked Penngrove's three stone quarries, and the local rock was used for paving and building around the Bay Area.

After the turn of the 20th century, Penngrove became the second largest egg and poultry producer in the entire United States, alongside neighboring Petaluma.

Penngrove's first school, the Eagle School, was built in 1876 at Adobe Road and Main Street; a mission-style replacement built in 1926 became Penngrove School, and Penngrove Elementary School still serves the town today.

Thanks to Sonoma Mountain's ancient volcanism, the ground around Penngrove is rich with obsidian and petrified wood.

The 2020 United States census reported Penngrove's population was 2,637, up from 2,522 at the 2010 census, spread over about 4 square miles.

Penngrove first appeared as a census designated place in the 2010 U.S. census, and its short Main Street still preserves the feel of a 19th-century railroad town.