Laguna Niguel, CA Water Safety: 66/100 (2026)
2 ZIP codes · 3 water systems · Updated 2026-06-03
Compared to top-scoring cities in CA, Laguna Niguel lands in the middle tier — some water systems meet standards cleanly, others carry documented violations, and performance can vary significantly across service areas.
How Laguna Niguel Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Laguna Niguel Residents
- Estimated remediation: $1,200 per household.
- CDC health risk index: 10.23.
Laguna Niguel's Water Providers
Laguna Niguel, CA draws its residential water from 3 separate providers among the 3 federally tracked systems. Each operates independently, with its own infrastructure, rate structure, and compliance record.
Overview
We track water quality and home safety data for 2 ZIP codes in Laguna Niguel, California (population ~64,023), covering 3 community water systems serving approximately 251,038 people region-wide.
No EPA violations recorded across any ZIP codes in Laguna Niguel — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Laguna Niguel: 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
Laguna Niguel water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Laguna Niguel
- 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 |
|---|---|---|---|
| 92607 | C | SANTA MARGARITA WATER DISTRICT-ID9 | 39,684 |
| 92677 | C | SANTA MARGARITA WATER DISTRICT-ID9 | 39,684 |
All ZIP Codes in Laguna Niguel
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.
Laguna Niguel 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 Laguna Niguel
Placing remediation in the context of Laguna Niguel's property market, the equity share is low — most homeowners here are weighing a financial commitment that fits comfortably within routine property planning, far from the threshold where remediation becomes a material equity decision rather than a standard upkeep consideration.
Remediation costs in Laguna Niguel are relatively low compared to home values. The $800–$1,800 estimated range is a small fraction of median property value. Home values are 52% above the California average.
Laguna Niguel: Flood History & Water Damage Risk
NFIP records stretching across multiple decades show Laguna Niguel accumulating 49 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.
Laguna Niguel has a moderate flood history with 49 FEMA claims averaging $6,661 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>$1,200</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 Laguna Niguel
- 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 Laguna Niguel, CA