Mendocino County, California
27 ZIP codes · Avg score 93/100 · Grade A · Updated
ZipCheckup grade for Mendocino County: A.
No federal data flags a major home-safety concern for this ZIP.
Water utilities serving Mendocino County's 27 ZIP codes have built a consistent compliance record - the county's above-average grade reflects years of data showing low violation rates and no systemic health concerns.
How Mendocino County Compares
How Mendocino County Compares
Mendocino County scores 17 points above the California state average (76/100) and 20 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Mendocino County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.8 (asthma 10.6%, diabetes 13.7%)
Estimated additional annual cost per homeowner: $1,549, driven primarily by flood
61% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Mendocino County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 3 violations. Past 5 years: 5 total (5 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,549
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
40,998 housing units in Mendocino County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Mendocino County
Remediation costs are relatively manageable for most homeowners in Mendocino County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Mendocino County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Mendocino County
8 community water systems serving Mendocino County.
- B
- A
- A
- A
- B
- B
Show all 8 water systems
- A
10 total water systems serve Mendocino County.
Systems with the most violations in Mendocino County
5 water systems with recorded EPA violations.
- A
- A
- B
- B
- B
All ZIP Codes in Mendocino County
27 ZIP codes tracked in Mendocino County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 95470 | Redwood Valley | 100 | A | 0 | $533K |
| 2 | 95490 | Willits | 97 | A | 5 | $384K |
| 3 | 95437 | Fort Bragg | 96 | A | 2 (1 health) | $541K |
| 4 | 95482 | Ukiah | 78 | B | 5 (1 health) | $473K |
| 5 | 95410 | Albion | — | — | $706K | |
| 6 | 95415 | Boonville | — | — | 2 | $638K |
| 7 | 95417 | Branscomb | — | — | — | |
| 8 | 95418 | Calpella | — | — | — | |
| 9 | 95420 | Caspar | — | — | $1103K | |
| 10 | 95427 | Comptche | — | — | $868K | |
| 11 | 95428 | Covelo | — | — | $376K | |
| 12 | 95429 | Dos Rios | — | — | $377K | |
| 13 | 95432 | Elk | — | — | $728K | |
| 14 | 95445 | Gualala | — | — | 0 | $665K |
| 15 | 95449 | Hopland | — | — | $597K | |
| 16 | 95454 | Laytonville | — | — | $385K | |
| 17 | 95456 | Little River | — | — | $490K | |
| 18 | 95459 | Manchester | — | — | 0 | $643K |
| 19 | 95460 | Mendocino | — | — | $666K | |
| 20 | 95463 | Navarro | — | — | — | |
| 21 | 95468 | Point Arena | — | — | 0 | $451K |
| 22 | 95469 | Potter Valley | — | — | 0 | $594K |
| 23 | 95481 | Talmage | — | — | — | |
| 24 | 95488 | Westport | — | — | — | |
| 25 | 95494 | Yorkville | — | — | 0 | — |
| 26 | 95585 | Leggett | — | — | $374K | |
| 27 | 95587 | Piercy | — | — | — |
Recommended Buyer Guides for Mendocino County
Independent picks. EPA-grounded. Matched here.
- Best Lead Paint Test Kits — 61% of homes built before 1978
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Mendocino County, California
Overview
Mendocino County in California covers 27 tracked ZIP records with an average Home Safety Score of A (93/100) across 4 scored records.
4 of 10 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 2 health-based violations appear in the available health breakdown.
← Back to California Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.