National City, CA Home Safety: Home Safety 75/100
2 ZIP codes · 2 water systems · Updated
ZipCheckup grade for National City: B.
This ZIP looks solid, with a few items worth a quick check.
For households in National City, CA water data shows a consistently above-average safety picture.
How National City Compares
Data: EPA SDWIS
National City Water: The Quick Version
- Estimated remediation: $3,100 per household.
- CDC health risk index: 10.18.
Water Systems Serving National City
Throughout National City, CA, water comes from one of 2 primary utilities out of 2 total systems - independent providers with different rate structures, infrastructure, and compliance records that vary across the service territory.
- B
- B
Overview
We track home safety data for 2 ZIP codes in National City, California (population ~57,173), covering 2 community water systems serving approximately 1,576,661 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 2 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 National City: B (75/100)
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
National City water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0000 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
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 |
|---|---|---|---|
| 91950 | B | Sweetwater Authority | 191,282 |
All ZIP Codes in National City
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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
CDC Health Data for National City
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
National City: Remediation Cost in Perspective
In National City, property wealth outpaces what documented remediation typically demands - the equity burden lands well within the low tier.
Remediation costs in National City are relatively low compared to home values. The $2,200–$4,800 estimated range is a small fraction of median property value. Home values are 21% below the California average.
Historical Flood-Claim Evidence for National City
Historical NFIP data for National City contains 55 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $97,801. Among ZIP codes with claim records, 100% 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. The <strong>$3,100</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
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 National City, CA