La Mirada, CA Water Safety: 56/100 (2026)
3 ZIP codes · 5 water systems · Updated 2026-06-03
Although much of La Mirada meets baseline drinking water standards, some CA-tracked service areas show violations that merit a closer look — particularly for older housing stock.
How La Mirada Compares
Data: EPA SDWIS Last verified: 2026-06-03
La Mirada Water: The Quick Version
- Estimated remediation: $1,200 per household.
- CDC health risk index: 10.71.
Water Systems Serving La Mirada
Across La Mirada, CA, residential water comes from 3 primary utilities rather than a single consolidated provider. Each system operates independently — managing its own distribution infrastructure, rate schedules, and EPA compliance filings. Federal records track 5 water systems in the area, with these top providers accounting for the majority of residential connections.
Overview
We track water quality and home safety data for 3 ZIP codes in La Mirada, California (population ~47,428), covering 5 community water systems serving approximately 279,790 people region-wide.
No EPA violations recorded across any ZIP codes in La Mirada — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for La Mirada: C (56/100)
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
La Mirada water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for La Mirada
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 3 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 90637 | D | WHITTIER-CITY, WATER DEPT. | 49,954 |
| 90638 | C | City of Buena Park | 81,998 |
| 90639 | D | Suburban Water Systems-la Mirada | 56,793 |
All ZIP Codes in La Mirada
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.
CDC Health Data for La Mirada
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
La Mirada: Remediation Cost in Perspective
In La Mirada, the equity impact of remediation is proportionally small — not the kind of financial commitment that rises to the level of a genuine planning constraint, but a minor share of what most properties here are worth.
Remediation costs in La Mirada are relatively low compared to home values. The $533–$1,933 estimated range is a small fraction of median property value. Home values are 4% above the California average.
Climate-Related Water Risk for La Mirada
Across the NFIP's long tracking period, La Mirada shows 5 claims and 33% of ZIP codes within FEMA-designated flood zones — figures that place it in moderate flood exposure territory. At this level, the water-quality implications of flooding — contaminated wells, stressed treatment intake, distribution backflow — move from theoretical edge cases to genuine periodic risks, particularly during higher-severity events.
La Mirada has a moderate flood history with 5 FEMA claims averaging $1,447 per payout. 33% 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>$1,200</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 La Mirada
- 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 La Mirada, CA