Humboldt County, California
38 ZIP codes · Avg score 99/100 · Grade A · Updated
ZipCheckup grade for Humboldt County: A.
No federal data flags a major home-safety concern for this ZIP.
Humboldt County earns a high water safety grade - 38 ZIP codes tracked, virtually all compliant.
How Humboldt County Compares
How Humboldt County Compares
Humboldt County scores 23 points above the California state average (76/100) and 26 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: Humboldt County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.8 (asthma 11%, diabetes 11.4%)
Estimated additional annual cost per homeowner: $4,271, driven primarily by sea_level
68% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
→ Stable trendEPA violation counts by year across Humboldt County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 16 violations. Past 5 years: 18 total (18 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: $4,271
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
62,494 housing units in Humboldt 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 Humboldt County
Remediation costs are relatively manageable for most homeowners in Humboldt 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 Humboldt County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Humboldt County
8 community water systems serving Humboldt County.
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Show all 8 water systems
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12 total water systems serve Humboldt County.
Systems with the most violations in Humboldt County
3 water systems with recorded EPA violations.
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All ZIP Codes in Humboldt County
38 ZIP codes tracked in Humboldt County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 95501 | Eureka | 100 | A | 0 | $390K |
| 2 | 95503 | Eureka | 100 | A | 0 | $412K |
| 3 | 95524 | Bayside | 100 | A | 0 | $585K |
| 4 | 95537 | Fields Landing | 100 | A | 0 | $360K |
| 5 | 95540 | Fortuna | 100 | A | 0 | $362K |
| 6 | 95562 | Rio Dell | 100 | A | 0 | $311K |
| 7 | 95589 | Whitethorn | 100 | A | 0 | $439K |
| 8 | 95521 | Arcata | 99 | A | 1 | $479K |
| 9 | 95525 | Blue Lake | 99 | A | 1 | $490K |
| 10 | 95519 | Mckinleyville | 98 | A | 2 | $433K |
| 11 | 95546 | Hoopa | 95 | A | 3 (1 health) | $253K |
| 12 | 95502 | Eureka | — | — | — | |
| 13 | 95511 | Alderpoint | — | — | — | |
| 14 | 95514 | Blocksburg | — | — | — | |
| 15 | 95518 | Arcata | — | — | — | |
| 16 | 95526 | Bridgeville | — | — | $338K | |
| 17 | 95528 | Carlotta | — | — | $515K | |
| 18 | 95534 | Cutten | — | — | — | |
| 19 | 95536 | Ferndale | — | — | 0 | $571K |
| 20 | 95542 | Garberville | — | — | 0 | $414K |
| 21 | 95545 | Honeydew | — | — | 0 | $480K |
| 22 | 95547 | Hydesville | — | — | 0 | $489K |
| 23 | 95549 | Kneeland | — | — | 0 | $661K |
| 24 | 95550 | Korbel | — | — | 1 | $857K |
| 25 | 95551 | Loleta | — | — | 0 | $470K |
| 26 | 95553 | Miranda | — | — | 0 | $438K |
| 27 | 95554 | Myers Flat | — | — | $431K | |
| 28 | 95555 | Orick | — | — | 3 (1 health) | $400K |
| 29 | 95556 | Orleans | — | — | 3 (1 health) | $324K |
| 30 | 95558 | Petrolia | — | — | — | |
| 31 | 95559 | Phillipsville | — | — | — | |
| 32 | 95560 | Redway | — | — | $364K | |
| 33 | 95564 | Samoa | — | — | 0 | $422K |
| 34 | 95565 | Scotia | — | — | 0 | $350K |
| 35 | 95569 | Redcrest | — | — | 0 | $433K |
| 36 | 95570 | Trinidad | — | — | 1 | $599K |
| 37 | 95571 | Weott | — | — | 0 | — |
| 38 | 95573 | Willow Creek | — | — | 3 (1 health) | $337K |
Recommended Buyer Guides for Humboldt County
Four sources - EPA, NSF, FEMA, CDC - drive the match.
- Best Lead Paint Test Kits — 68% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Humboldt County, California
Overview
Humboldt County in California covers 38 tracked ZIP records with an average Home Safety Score of A (99/100) across 11 scored records.
9 of 27 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 1 health-based violation 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.