Cotati City Hall – 201 W Sierra Ave, Cotati, CA 94931
Administrative Services Department
Hours: Monday through Thursday, 7:30 AM to 5:30 PM, Closed for Lunch from 12:00 PM to 1:00 PM
Closed Fridays

City of Healdsburg Utility Billing – 401 Grove St, Healdsburg, CA 95448
Hours: Monday through Thursday, 7:30 AM to 5:30 PM, Every other Friday, 8:00 AM to 5:00 PM

Marin Water – 220 Nellen Ave, Corte Madera, CA 94945
Hours: Monday through Thursday, 8:00 AM to 4:30 PM
Serving San Rafael, San Anselmo, Fairfax, Belvedere-Tiburon, Mill Valley, Sausalito, Larkspur, and Corte Madera

North Marin Water District Office – 100 Wood Hollow Dr, Novato, CA 94945
Hours: By appointment only by calling (415) 897-4133, Monday through Friday 8:00 AM to 5:00 PM

City of Petaluma Water Field Office – 202 N McDowell Blvd, Petaluma, CA 94954
Hours: Monday through Thursday, 8:00 AM to 5:00 PM, Closed during lunch from 12:00 PM to 1:00 PM, Closed Fridays.

Petaluma City Hall (Finance Department) – 11 English St, Petaluma, CA 94952
Hours: Monday through Thursday, 9:00 AM to 3:00 PM, Closed Fridays.

City of Rohnert Park Public Works – 600 Enterprise Dr, Rohnert Park, CA 94928
Hours: Monday through Friday, 9:00 AM to 3:00 PM

Santa Rosa Water – 69 Stony Cir, Santa Rosa, CA 95401
Hours: Monday through Friday, 8:00 AM to 5:00 PM
Santa Rosa Water customer may also request dye tabs by mail here.

Santa Rosa City Hall Annex – 90 Santa Rosa Ave, Santa Rosa, CA 95404
Hours: Monday through Friday, 8:00 AM to 5:00 PM

Sonoma Water Administration Building – 404 Aviation Blvd, Santa Rosa, CA 95403
Hours: Monday through Friday, 8:00 AM to 5:00 PM

California-American Water Larkfield and Geyserville Districts – 4787 Old Redwood Hwy, Santa Rosa, CA 95403
Hours: Monday through Friday, 8:30 AM to 4:00 PM, Closed during lunch from 12:00 PM to 1:00PM
Or call our office during business hours at 707-542-8329 extension 0

Sonoma City Hall – No. 1 The Plaza, Sonoma, CA 95476
Hours: Monday through Thursday 8:00AM to 5:00PM, Closed during lunch from 12:00 PM to 1:00 PM, Closed Fridays

Valley of the Moon Water District Office (El Verano) – 19039 Bay St, Sonoma, CA 95476
Hours: Monday – Thursday, 8:00 AM to 5:00 PM, Closed during lunch from 12:00 PM to 12:30 PM
Fridays 8:00 AM to 4:00 PM, Closed during lunch 12:00 PM to 12:30 PM

Town of Windsor Public Works Department – 8400 Windsor Rd, Windsor, CA 95492
Hours: Monday-Thursday 7:00 AM to 6:00 PM, Closed Fridays

Town of Windsor Utility Billing Counter – 9291 Old Redwood Hwy #300A, Windsor, CA 95492
Hours: Monday-Thursday 7:00 AM to 6:00 PM, Closed Fridays