CITY REPORT CA

Seal Beach, CA Home Safety: Home Safety 92/100

1 ZIP code · 2 water systems · Updated

ZipCheckup grade for Seal Beach: A.

Checked records flag no major concern; missing data is unknown.

Across Seal Beach, CA, the overall grade falls in the upper range - a summary score, not a measurement taken at any single tap.

How Seal Beach Compares

Seal Beach92/100
California avg76/100
National avg73/100

Data: EPA SDWIS

1
ZIP Codes
2
Water Systems
0
ZIPs Linked to Systems with Violations
A · 92
Avg Safety Score
Zone 3
County Radon Potential (Low)
$488K
Median Home Value

Seal Beach Water: The Quick Version

  • Average of reported 90th-percentile lead results: 0.0022 mg/L.
  • Homes built before 1986: 90% - older plumbing may contain lead solder.
  • Health risk index (ZipCheckup composite of CDC data): 10.23.

Water Systems Serving Seal Beach

Multiple utilities show up for Seal Beach, CA: 2 are listed here out of 2 tracked federally.

Overview

We track home safety data for 1 ZIP code in Seal Beach, California (population ~24,382), covering 2 community water systems serving approximately 139,316 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.

The available EPA record reports 0 violations for 1 ZIP code with a reported violation count.

Home Safety Score

Average Home Safety Score for Seal Beach: A (92/100)

Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:

Factor What It Measures
Water Quality EPA violations and compliance history
PFAS MCL Screen UCMR 5 testing against the covered federal MCLs
Radon Risk EPA radon zone classification
Annual AQI EPA AirData county-year median with at least 90 observed days

Water Sources

Seal Beach water systems draw from: Surface water.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0022 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 1 ZIP code with known status exceed the EPA lead action level

Radon Risk

1 of 1 ZIP records with known zones is in EPA Radon Zone 3.

The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.

Areas with No Violations

ZIP Code Safety Score System Population
90740 A City of Seal Beach 24,937

All ZIP Codes in Seal Beach

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

CDC Health Data for Seal Beach

9%
Asthma (US: 9.8%)
11.5%
Diabetes (US: 10.4%)
16%
Poor Mental Health (US: 14.8%)

Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.

Compared to National Average

Asthma 9% ↓
Diabetes 11.5% ↑
Mental Health 16% ↑

Vertical line = national average. ■ Above national · ■ Below national

How Old Is Seal Beach's Housing Stock?

1964
Median Build Year
90%
Built Before 1986
74%
Built Before 1970
Galvanized Steel or Copper
Likely Pipe Material

With 90% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.

Source: U.S. Census Bureau American Community Survey (ACS).

Housing Age Profile

Ask the water utility whether your address in Seal Beach has a lead service line; its inventory can answer what a median build year of 1964 cannot.

1964
Median Year Built
90%
Pre-1986 (lead solder era; lead paint banned 1978)
74%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (74%) 1970–1986 (16%) Post-1986 (10%)

Over half of homes in Seal Beach were built before 1986, when federal law began restricting lead solder in drinking-water plumbing. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.

Source: U.S. Census Bureau ACS B25034.

Protecting Children from Lead in Seal Beach

90%
Homes Built Before 1986
0.0022
mg/L average of reported water-system 90th-percentile lead results (the 0.015 action level applies to each system's result, not to this average)

Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Historical Flood-Claim Evidence for Seal Beach

112
Total FEMA Flood Claims
$17,915
Avg Reported Sum With Payment Data
0%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Seal Beach contains 112 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $17,915. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

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.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.

Deep Dive Reports

Detailed analysis for Seal Beach, CA

Frequently Asked Questions

What does the Home Safety Score mean for Seal Beach, CA?
Seal Beach has an average Home Safety Score of 92/100 (Grade A) under ZipCheckup model 4.0.0, an area-level model that draws on EPA water compliance records, PFAS screening, EPA radon zones, and annual EPA air quality data; see the methodology page for how inputs and coverage are handled. The available EPA record reports no violations for ZIP codes with reported counts. Check individual ZIP code reports for component details.
Does Seal Beach water have lead?
The average of the reported 90th-percentile lead results across the ZIP codes of Seal Beach is 0.0022 mg/L. The EPA action level of 0.015 mg/L applies to each water system's own 90th percentile, not to this average. EPA's health goal for lead is zero. Lead levels can vary by home - testing is recommended especially in older properties.
How does Seal Beach compare to California average?
Seal Beach has an average Home Safety Score of 92/100, which is at or above the California state average of 76/100 for the same model series.
How many water systems serve Seal Beach?
Our records map 2 water systems to 1 ZIP code in Seal Beach. The related population figure in our data is approximately 24,382 people; it is not a count of people served citywide.
Home → Cities → California → Seal Beach, CA

How to cite this page

APA ZipCheckup. (2026). Seal Beach, CA Home Safety: Home Safety 92/100. https://zipcheckup.com/cities/ca/seal-beach/
BibTeX 
@misc{zipcheckup-cities-ca-seal-beach,
  author = {{ZipCheckup}},
  title  = {{Seal Beach, CA Home Safety: Home Safety 92/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/ca/seal-beach/}
}

Page version: October 2026.

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