Hawthorne
Is Hawthorne tap water safe to drink?
Mostly yes — Hawthorne scores 98/100. This report aggregates EPA drinking water data across 5 local systems in Hawthorne. We found 15 total violations (5 unresolved).
Real-Time Environment
Live: 03:00 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Hawthorne.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Hawthorne?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Filter requirements and certified reduction benchmarks for Hawthorne tap water.
Baby Formula Safety
Infant formula preparation risks, nitrate levels, and lead pipe guidance in Hawthorne.
Homebuyer's Perspective
Evaluating water infrastructure in Hawthorne protects plumbing and helps estimate water heater longevity. The high safety score (98/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Lead (90th percentile) levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Compliance Record for Hawthorne
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Hawthorne.
Frequently Asked Questions
Is Hawthorne tap water safe to drink?
Mostly yes — Hawthorne scores 98/100.
How many water systems serve Hawthorne?
Hawthorne is served by 5 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Hawthorne?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Hawthorne.
What is the water quality score for Hawthorne?
The water quality score for Hawthorne is 98 out of 100, based on EPA contaminant data, violation history, and testing results across the 5 systems serving the city.
What are the top contaminants in Hawthorne?
The top contaminants detected in Hawthorne include Lead (90th percentile). View detailed information on our contaminants page.
Hawthorne Water Quality Summary
Hawthorne, CA receives a water quality score of 98/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 5 public water systems serving the area.
Hawthorne's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.
Hawthorne's score of 98 is 9 points above the California state average of 89, and above the nationwide average of roughly 78/100 across all U.S. states.
As a large city in a West Coast region shaped by major urban centers, agricultural activity, and diverse geology, Hawthorne distributes tap water through multiple localized systems. Homeowners and prospective buyers will find reassurance in the city's outstanding water quality ratings, which demonstrate excellent infrastructure performance across all networks. This track record of compliance means residents can trust that their household water consistently meets superb safety standards.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our California water quality rankings report →
Key Contaminants
Join the Hawthorne updates waitlist
We are developing email updates. This form records your interest; automated violation and boil-water advisory emails are not active.
We will use your address to contact you if updates become available. See our Privacy Policy.
Water Systems Serving Hawthorne (5)
Golden State Water Company - Los Osos
AGolden State Water Company - Edna
AGolden State Water Company - Tanglewood
AGolden State Water Company - Orcutt
AGswc - Southwest
ACheck Your Specific Address
Water quality can vary by neighborhood in Hawthorne.
Related
Quick compare in California
Compare Hawthorne water quality: View all states · Contaminant library · How we score water quality