Windsor firefighters, the three-time winners of an annual blood drive competition, are hosting their event until 3 p.m. today at Station 2, 8600 Windsor Road.

More than 100 people had signed up to donate blood, and the blood drive organizer, Capt. Dean Crothers, said he was hoping for as many as 160 donors.

Residents are welcome to drop in any time to donate a pint of blood to the Blood Centers of the Pacific.

Fire agencies from Sonoma, Mendocino and Lake counties compete in the "Bucket Brigade Challenge" during December and January every year, Crothers said.

Windsor is aiming for its fourth straight championship after staving off a close challenge from the Lakeport department last year, he said.

Crothers said he backed off on pre-drive publicity efforts because about 200 people showed up last year, causing donors to wait two to three hours.

Fire agencies hold their blood drives on separate days during the two winter months, a time when blood banks are often stretched to maintain their supplies, Crothers said.

Windsor residents who miss today's drive, or residents of any other community, may donate at Blood Centers of the Pacific, 2324 Bethards Drive in Santa Rosa, through the end of January and ask that it be credited to their firefighters.