Tapcensus

Water quality in Woodside, California

Woodside is in San Mateo County. 51 active public water systems serve the county; 15 had an EPA violation in the past three years.

Most likely your provider

California Water Service Bear Gulch CA4110006 · Community water system · Surface water
Serves 60,382 people Rules violated, past 3 years 0 Last sanitary survey Feb 20, 2025 Distance 2.7 mi

Your location is within the outer bounds of this system's EPA service area.

View system details EPA facility report

Other community water systems in San Mateo County

35 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
City of Redwood City
Redwood City		 90,043 0 4.9 mi
California Water Service San Carlos
 34,801 0 5.2 mi
Menlo Park Municipal Water
Menlo Park		 22,362 0 5.2 mi
O'connor Tract Co-Operative Water Co.
 2,789 0 6.6 mi
Mid-Peninsula Water District
 31,059 0 6.7 mi
Palo Alto Park Mutual Water Company
 2,900 0 6.9 mi
Cuesta la Honda Guild INC
 863 0 7.2 mi
City of East Palo Alto
East Palo Alto		 29,519 0 7.4 mi
Redwood Terrace Mutual
 56 1 7.6 mi
County Service Area 7
 300 1 8.2 mi
California Water Service San Mateo
 103,536 0 9.2 mi
Estero Municipal Improvement District
 36,556 0 9.3 mi
Camp Jones Gulch
 44 0 9.4 mi
Camp Loma Mar
 25 2 10.1 mi
Redwood Glen Camp & Conference Ctr
 31 0 10.7 mi
Coastside County Water District
 19,033 0 10.7 mi
Town of Hillsborough
 11,766 0 10.8 mi
Loma Mar Mutual
 65 0 10.8 mi
Portola Improvement Association Mwc
 80 1 11.4 mi
City of Burlingame
Burlingame		 32,453 0 12.8 mi
Bianchi Flowers INC
 65 1 13.4 mi
Butano Canyon Mutual
 150 0 13.4 mi
County Service Area 11
 450 0 13.6 mi
Oku Incorporated
 35 3 14.2 mi
City of Millbrae
Millbrae		 22,795 1 14.6 mi
All 36 community water systems in San Mateo County
Non-community systems in San Mateo County (15: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
LA Honda Center
 33 0 0
UC Elkus Ranch
 34 0 0
Skylawn Memorial Park (skylawn Inc)
 50 1 1
Optimists Volunteers for Youth
 205 1 0
Martins Beach Water System
 49 1 0
San Gregorio Company
 32 1 0
San Mateo County Memorial Park
 1,790 0 0
Csp Portola State Park
 172 0 0
Harley Farms Goat Dairy
 113 0 0
Butano Girl Scout Camp
 154 0 0
Butano State Park Csp
 121 0 0
Pigeon Point Hostel
 67 1 1
Gazos Creek Beach House
 33 0 0
Costanoa Campground
 33 1 0
Csp Ano Nuevo State Park
 709 0 0
About this data

Water systems are matched to San Mateo County, nearest to Woodside first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.

Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The California records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.