CALIFORNIA WATER SERVICE - SAN MATEO
Serving 5 cities in CA
Official CALIFORNIA WATER SERVICE - SAN MATEO Resources
Quick Actions
Emergency Contact
Available 24/7 for emergencies
CALIFORNIA WATER SERVICE - SAN MATEO Service Area
Loading map...
This map shows the approximate service area for CALIFORNIA WATER SERVICE - SAN MATEO. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.
CALIFORNIA WATER SERVICE - SAN MATEO Water Quality Grade
Water quality is good with minor concerns.
Grade is calculated based on contaminants exceeding health guidelines (MCLG) and EPA Maximum Contaminant Level violations. A = Excellent (90-100), B = Good (80-89), C = Fair (70-79), D = Poor (60-69), F = Failing (<60).
Is CALIFORNIA WATER SERVICE - SAN MATEO Water Safe to Drink?
CALIFORNIA WATER SERVICE - SAN MATEO has reported 2 contaminants above EPA health-based guidelines (MCLGs) in at least one city served. We recommend reviewing individual city reports below for specific water quality details.
This utility serves 102,663 people across 5 cities in CA. Water quality can vary by location within the service area. Check individual city pages below for detailed contaminant data specific to your area.
CALIFORNIA WATER SERVICE - SAN MATEO Service Area
Baywood Park, CA
Belmont, CA
Highlands, CA
Hillsborough, CA
San Mateo, CA
CALIFORNIA WATER SERVICE - SAN MATEO Contact & Information
Phone
Emergency Line
24/7 After-Hours
Mailing Address
Water Sources & Treatment
Water Sources
Treatment Methods
Disinfectant Used
chloramines
CALIFORNIA WATER SERVICE - SAN MATEO Annual Water Quality Reports
Historical reports are being compiled. Check back soon for archived water quality data.
What is a CCR? The Consumer Confidence Report (CCR) is an annual water quality report that water utilities are required by the EPA to provide to customers. It contains information about your water source, detected contaminants, and compliance status.
Recommended Water Filters for CALIFORNIA WATER SERVICE - SAN MATEO
Based on water quality data from cities served by CALIFORNIA WATER SERVICE - SAN MATEO, we recommend NSF-certified filters that can remove contaminants above health guidelines.
Stay Informed About Your Water Quality
Get EPA reports, filter recommendations, and safety alerts for your area.
Join 10,000+ people protecting their families. Unsubscribe anytime.