Los Alamitos, CA Water Safety: 66/100 (2026)
2 ZIP codes · 3 water systems · Updated 2026-06-03
Compared to top-scoring cities in CA, Los Alamitos lands in the middle tier — some water systems meet standards cleanly, others carry documented violations, and performance can vary significantly across service areas.
How Los Alamitos Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Los Alamitos Residents
- Estimated remediation: $1,800 per household.
- CDC health risk index: 10.23.
Los Alamitos's Water Providers
In Los Alamitos, CA, residential water supply is distributed across multiple utilities rather than concentrated in one. The 3 leading providers out of 3 tracked systems each control their own infrastructure, file separate EPA compliance reports, and set independent rate schedules.
Overview
We track water quality and home safety data for 2 ZIP codes in Los Alamitos, California (population ~24,021), covering 3 community water systems serving approximately 313,542 people region-wide.
No EPA violations recorded across any ZIP codes in Los Alamitos — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Los Alamitos: C (66/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Los Alamitos water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Los Alamitos
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 2 ZIP codes
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 90720 | C | Golden State Wc - West Orange County | 114,379 |
| 90721 | C | CITY OF GARDEN GROVE | 174,226 |
All ZIP Codes in Los Alamitos
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Los Alamitos Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
How Remediation Costs Compare in Los Alamitos
In Los Alamitos, documented water and safety issues can be addressed without making a meaningful dent in home equity — the financial proportionality here is favorable, and the commitment fits within standard property planning frameworks.
Remediation costs in Los Alamitos are relatively low compared to home values. The $1,200–$2,600 estimated range is a small fraction of median property value. Home values are 58% above the California average.
Los Alamitos: Flood History & Water Damage Risk
NFIP records stretching across multiple decades show Los Alamitos accumulating 11 claims and carrying 50% of its ZIP codes inside FEMA flood zones — evidence of meaningful exposure that extends beyond isolated incidents. The mechanisms linking flooding to water quality haven't changed: treatment facilities can be overwhelmed, wells can be infiltrated, and distribution systems can experience backflow. For a community at this exposure level, those mechanisms shift from hypothetical to periodically relevant.
Los Alamitos has a moderate flood history with 11 FEMA claims averaging $2,549 per payout. 50% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,800</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Los Alamitos
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Los Alamitos, CA