Rosemead
Is Rosemead tap water safe to drink?
Mostly yes — Rosemead scores 97/100. This report aggregates EPA drinking water data across 11 local systems in Rosemead. We found 99 total violations (13 unresolved).
Real-Time Environment
Live: 03:00 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Rosemead.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Rosemead?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Filtration technologies matched to Rosemead contaminant records.
Baby Formula Safety
Guidance on preparing infant formula using municipal tap water in Rosemead.
Homebuyer's Perspective
Municipal water quality in Rosemead directly influences pipe corrosion rates and home filtration needs. The high safety score (97/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Copper (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 Rosemead
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Rosemead.
Frequently Asked Questions
Is Rosemead tap water safe to drink?
Mostly yes — Rosemead scores 97/100.
How many water systems serve Rosemead?
Rosemead is served by 11 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Rosemead?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Rosemead.
What is the water quality score for Rosemead?
The water quality score for Rosemead is 97 out of 100, based on EPA contaminant data, violation history, and testing results across the 11 systems serving the city.
What are the top contaminants in Rosemead?
The top contaminants detected in Rosemead include Copper (90th percentile), Lead (90th percentile). View detailed information on our contaminants page.
Rosemead Water Quality Summary
Rosemead, CA receives a water quality score of 97/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 11 public water systems serving the area.
Rosemead'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.
Rosemead's score of 97 is 8 points above the California state average of 89, and above the nationwide average of roughly 78/100 across all U.S. states.
Rosemead's residents and prospective homebuyers can feel confident in the tap water serving this mid-size California city, which consistently delivers near-flawless test results across its various local distribution networks. Despite being located in a West Coast region shaped by massive urban centers, agriculture, and complex geologic formations, the local supply successfully avoids common environmental vulnerabilities. This exceptional track record means households enjoy clean, highly reliable tap water for daily use without the immediate concerns often facing communities in similarly complex regions.
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
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Water Systems Serving Rosemead (11)
Cal American Water Co
ACal American Wc - Las Posas Estates
ACal American Water Company - Piru
ACal American Wc - Rio Plaza
ACal-Am Water Company - East Pasadena
ASan Gabriel County Wd
AAmarillo Mutual Water Company
ABellflower Municipal Water System
ACal/Am Water Company - Baldwin Hills
ACal/Am Water Company - San Marino
ACal-Am Water Company - Duarte
ACheck Your Specific Address
Water quality can vary by neighborhood in Rosemead.
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