Larkspur, CA Home Safety: Home Safety 100/100
2 ZIP codes · 1 water system · Updated
ZipCheckup grade for Larkspur: A.
No federal data flags a major home-safety concern for this ZIP.
In current tracking cycles, Larkspur records above-average water quality outcomes for CA; compliance history over recent years shows few departures from federal standards and no systemic failures across its water systems.
How Larkspur Compares
Data: EPA SDWIS
Larkspur Water: The Quick Version
- Estimated remediation: $1,000 per household.
- CDC health risk index: 10.78.
Water Systems Serving Larkspur
In Larkspur, CA, the drinking water supply is organized under a single dominant utility - a consolidated structure that shapes how infrastructure investment, regulatory compliance, and rate decisions flow to households. When one provider handles the overwhelming share of residential connections out of 1 tracked system, accountability is clear: service upgrades, EPA violation responses, and tariff changes all funnel through that single organizational structure.
- A
Overview
We track home safety data for 2 ZIP codes in Larkspur, California (population ~7,372), covering 1 community water system serving approximately 186,895 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 Larkspur: A (100/100)
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
Larkspur 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 |
|---|---|---|---|
| 94939 | A | Marin Municipal Water District | 186,895 |
All ZIP Codes in Larkspur
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 Larkspur
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
Larkspur: Remediation Cost in Perspective
In Larkspur, property values comfortably outpace what documented remediation typically costs - the equity share is proportionally low.
Remediation costs in Larkspur are relatively low compared to home values. The $400–$1,700 estimated range is a small fraction of median property value. Home values are 171% above the California average.
Historical Flood-Claim Evidence for Larkspur
Historical NFIP data for Larkspur contains 101 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $24,076. 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>$1,000</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 Larkspur, CA