The Mountain View startup is building a synthetic-diamond chip plant in Petaluma, hoping to spark a new “Diamond Valley” cluster.

The rule covers all health workers and visitors regardless of vaccination status, running through March 31.

No injuries reported yet after a plane went down near Rooster Run Golf Club, closing East Washington Street.

A 2-1 appellate ruling keeps Charles Gideon Korrell's dismissal intact, but prosecutors say he still dodged a conviction.

Smoke from a prescribed burn at a 332-acre property drifted into Sebastopol as temperatures topped 90 degrees across west Sonoma County.

Sonoma County is preparing staffing and training before winter rains, following Cloverdale's lead from weeks earlier.

Michaelson plays Weill Hall on October 18 with Allie Moss and Hannah Winkler.

A Healdsburg traffic stop turned up a loaded ghost gun as police tied the Ridgway High fight to suspected gang activity.

Supervisors admit to wiping texts weekly or even daily — and a 2025 public records request came back empty.

Sonoma Con's third year adds a Whimsy Woods fairy village and board-game room at the Santa Rosa fairgrounds this weekend.

Thirty-two chefs battle in a sudden-death bracket, and Santa Rosa locals can watch it live for free.

Kenia Alegria's blood-alcohol level was at least 0.20 when her BMW crashed, killing both women she drove home from dinner.

Lake County crews tested portable hydrants that pump water straight from Clear Lake, as rural water systems remain outside proposed state wildfire requirements.