National City, CA Home Safety: Home Safety 75/100
2 ZIP codes · 2 water systems · Updated
ZipCheckup grade for National City: B.
This ZIP has a few items worth a quick check.
Based on available records, National City, CA holds an A or B ZipCheckup grade.
How National City Compares
Data: EPA SDWIS
National City Water: The Quick Version
- Estimated remediation: $600 per household.
- Health risk index (ZipCheckup composite of CDC data): 10.18.
Water Systems Serving National City
Federal records list 2 water systems tied to National City, CA. Of those, 2 are the primary providers, meaning service conditions, rate structures, and compliance histories can differ depending on where a property sits.
- 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 of reported 90th-percentile lead results: reported as 0 mg/L (a reported 0 is not proof of no lead; check the source record for its reporting limit) (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
2 of 2 ZIP records with known zones are 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 |
|---|---|---|---|
| 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). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
National City: Remediation Cost in Perspective
Of the three cost-context tiers - low, moderate and elevated - National City is in the low one.
Estimated remediation costs in National City can be compared with local home values. The $400–$800 estimated range can be set against the median property value; actual costs vary by home. 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 $600 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