Laguna Hills, CA Water Safety: 95/100 (2026)
2 ZIP codes · 5 water systems · Updated 2026-06-03
Unlike many cities its size in CA, Laguna Hills keeps health-based violation rates low — systems here score at or above the state average for tap water safety, with no systemic concerns flagged in the current data set.
How Laguna Hills Compares
Data: EPA SDWIS Last verified: 2026-06-03
Laguna Hills Water: The Quick Version
- Average lead level: 0.0023 mg/L.
- Estimated remediation: $1,100 per household.
- CDC health risk index: 10.23.
Water Systems Serving Laguna Hills
Residential addresses in Laguna Hills, CA are served by 3 primary water providers out of 5 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 2 ZIP codes in Laguna Hills, California (population ~29,596), covering 5 community water systems serving approximately 222,759 people region-wide.
No EPA violations recorded across any ZIP codes in Laguna Hills — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Laguna Hills: A (95/100)
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
Laguna Hills water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0023 mg/L (EPA action level: 0.015 mg/L)
- 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 |
|---|---|---|---|
| 92653 | A | Moulton Niguel Water District | 170,236 |
| 92654 | A | Moulton Niguel Water District | 170,236 |
All ZIP Codes in Laguna Hills
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 Laguna Hills
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
Laguna Hills: Remediation Cost in Perspective
In Laguna Hills, property values comfortably outpace what documented remediation typically costs — the equity share is proportionally low.
Remediation costs in Laguna Hills are relatively low compared to home values. The $700–$1,700 estimated range is a small fraction of median property value. Home values are 32% above the California average.
Protecting Children from Lead in Laguna Hills
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Lead risk in Laguna Hills appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Laguna Hills
Flood exposure in Laguna Hills is meaningful by NFIP measures — 22 claims on record and 50% of ZIP codes carrying FEMA flood zone designations. That level of activity makes flood history a relevant factor when evaluating local water quality over time.
Laguna Hills has a moderate flood history with 22 FEMA claims averaging $3,417 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>$1,100</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.
Deep Dive Reports
Detailed analysis for Laguna Hills, CA