GSWC - SOUTHWEST
Serving 12 cities in CA
Official GSWC - SOUTHWEST Resources
Quick Actions
Emergency Contact
Available 24/7 for emergencies
GSWC - SOUTHWEST Service Area
Loading map...
This map shows the approximate service area for GSWC - SOUTHWEST. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.
GSWC - SOUTHWEST Water Quality Grade
Significant water quality issues. Filter recommended.
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 GSWC - SOUTHWEST Water Safe to Drink?
GSWC - SOUTHWEST has reported 5 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 275,369 people across 12 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.
GSWC - SOUTHWEST Service Area
Alondra Park, CA
Carson, CA
Compton, CA
Del Aire, CA
Gardena, CA
Hawthorne, CA
Inglewood, CA
Lawndale, CA
Lennox, CA
West Athens, CA
West Rancho Dominguez, CA
Westmont, CA
GSWC - SOUTHWEST Contact & Information
Emergency Line
24/7 After-Hours
Mailing Address
Water Sources & Treatment
Water Sources
Treatment Methods
Disinfectant Used
chloramines, chlorine, hydrogen peroxide, hypochlorite, ozone
GSWC - SOUTHWEST 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 GSWC - SOUTHWEST
Based on water quality data from cities served by GSWC - SOUTHWEST, 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.