Sonoma County apparently is the biggest wood-burning air polluter in the Bay Area during no-burn days, and this year the regional air quality police is cracking down more than ever.

Sonoma County residents were slapped with 108 of the 346 warning letters issued during the Spare the Air season that ended Wednesday. That was the most of any jurisdiction in the nine-county Bay Area.

Unless Mother Nature changes her pattern, the Bay Area — including most of Sonoma County — is headed for a record number of high-pollution days when home wood fires are banned. ‘We’re on pace to possibly have the most winter Spare the Air alerts since the wood-burning rule has been in effect,’ a local air district official says.