Corona Del Mar, CA Water Safety: 65/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Compliance figures for Corona Del Mar indicate average water quality in CA overall — some service areas have recorded health-based violations in recent monitoring cycles, while others operate cleanly, making system-level data the most actionable reference point for residents.
How Corona Del Mar Compares
Data: EPA SDWIS Last verified: 2026-06-03
Corona Del Mar Water: The Quick Version
- Homes built before 1986: 72% — older plumbing may contain lead solder.
- Estimated remediation: $1,200 per household.
- CDC health risk index: 10.23.
Water Systems Serving Corona Del Mar
With 2 utilities splitting service in Corona Del Mar, CA, water accountability is distributed across 2 systems on the federal record.
Overview
We track water quality and home safety data for 1 ZIP code in Corona Del Mar, California (population ~12,328), covering 2 community water systems serving approximately 513,372 people region-wide.
No EPA violations recorded across any ZIP codes in Corona Del Mar — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Corona Del Mar: C (65/100)
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
Corona Del Mar water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Corona Del Mar
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 92625 | C | CITY OF NEWPORT BEACH | 68,572 |
All ZIP Codes in Corona Del Mar
- 92625 [C]
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 Corona Del Mar
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 Old Is Corona Del Mar's Housing Stock?
With 72% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Pre-1986 plumbing is not a rare legacy case in Corona Del Mar — it's the dominant profile. The median build year of 1976 indicates a housing stock where lead-soldered copper joints are a common structural feature of residences across the city.
Over half of homes in Corona Del Mar were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Corona Del Mar: Remediation Cost in Perspective
For most homeowners in Corona Del Mar, the estimated cost of water and safety remediation represents a proportionally modest share of what properties are worth — placing this area in the lower tier of the remediation share scale.
Remediation costs in Corona Del Mar are relatively low compared to home values. The $800–$1,800 estimated range is a small fraction of median property value. Home values are 171% above the California average.
Protecting Children from Lead in Corona Del Mar
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.
Despite citywide averages serving as the standard public reference point, those aggregates cannot resolve what is happening at one specific faucet — and where 72% of Corona Del Mar homes come from before the solder rule or where utility samples sit at or above the action mark, the gap between system data and faucet reality matters more than it does in lower-exposure communities. An in-home draw closes that gap, with certified filtration through retailer networks available where confirmed faucet results warrant additional measures.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Corona Del Mar
Across the NFIP's long tracking period, Corona Del Mar shows 45 claims and 100% 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.
Corona Del Mar has a moderate flood history with 45 FEMA claims averaging $9,948 per payout. 100% 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 Corona Del Mar
- 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. With 72% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Corona Del Mar, CA