La Mesa, CA Home Safety: Home Safety 92/100
4 ZIP codes · 3 water systems · Updated
ZipCheckup grade for La Mesa: A.
Checked records flag no major concern; missing data is unknown.
In ZipCheckup's scoring, La Mesa, CA lands in the A-B grade tier.
How La Mesa Compares
Data: EPA SDWIS
Who Supplies Your Water in La Mesa
Counting every public water system linked to La Mesa, CA in federal data gives 3. The list below keeps the 3 largest by reported population served, a figure that covers each system's whole service area rather than the city alone. A household's own supplier is named on its water bill.
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Overview
We track home safety data for 4 ZIP codes in La Mesa, California (population ~74,626), covering 3 community water systems serving approximately 1,901,055 people region-wide. The EPA snapshots used for this build directly map water systems to 2 of 4 ZIP codes.
The available EPA record reports 0 violations for 2 ZIP codes with a reported violation count.
Home Safety Score
Average Home Safety Score for La Mesa: 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
La Mesa 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 2 ZIP codes with known status exceed the EPA lead action level
Radon Risk
4 of 4 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 |
|---|---|---|---|
| 91941 | A | Helix Water District | 277,668 |
| 91942 | A | Helix Water District | 277,668 |
All ZIP Codes in La Mesa
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.
Health Outcomes in La Mesa
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
Historical NFIP Claim Context in La Mesa
Historical NFIP data for La Mesa contains 42 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $12,673. 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 La Mesa, CA