Mill Valley, CA Home Safety: Home Safety 100/100
2 ZIP codes · 2 water systems · Updated
ZipCheckup grade for Mill Valley: A.
No federal data flags a major home-safety concern for this ZIP.
Mill Valley, CA: reliable drinking water, above-average safety record, few violations.
How Mill Valley Compares
Data: EPA SDWIS
What You Should Know About Mill Valley Water
- Estimated remediation: $1,200 per household.
- CDC health risk index: 10.78.
Who Supplies Your Water in Mill Valley
Across Mill Valley, CA, residential water comes from 2 primary utilities rather than a single consolidated provider. Each system operates independently - managing its own distribution infrastructure, rate schedules, and EPA compliance filings. Federal records track 2 water systems in the area, with these top providers accounting for the majority of residential connections.
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Overview
We track home safety data for 2 ZIP codes in Mill Valley, California (population ~32,349), covering 2 community water systems serving approximately 205,342 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 Mill Valley: 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
Mill Valley 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 |
|---|---|---|---|
| 94941 | A | Marin Municipal Water District | 186,895 |
All ZIP Codes in Mill Valley
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 Mill Valley
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
Cost Context: What Remediation Means for Mill Valley Homeowners
In Mill Valley, the equity impact of remediation is proportionally small - not the kind of financial commitment that rises to the level of a genuine planning constraint, but a minor share of what most properties here are worth.
Remediation costs in Mill Valley are relatively low compared to home values. The $800–$1,800 estimated range is a small fraction of median property value. Home values are 169% above the California average.
Historical NFIP Claim Context in Mill Valley
Historical NFIP data for Mill Valley contains 390 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $14,059. 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>$1,200</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 Mill Valley, CA