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2026 Rankings
Humboldt County, California Home Safety Rankings - 40 ZIPs
Explore rankings under Home Safety Score model 4.0.0. Only ZIPs with all four required inputs are ranked; missing evidence is not imputed or reweighted.
Humboldt County, California (California) includes 40 tracked ZIP codes and 17 mapped community water systems; confirm service for a specific address. Below are the water quality rankings for metro ZIPs with all required inputs.
Average Home Safety Grade: A (99/100)
| Grade | ZIP Codes | % |
|---|---|---|
| A | 9 | 100% |
| B | 0 | 0% |
| C | 0 | 0% |
| D | 0 | 0% |
| F | 0 | 0% |
Top 10 ZIP Codes by Home Safety Score
| Rank | ZIP | City | Score | Grade |
|---|---|---|---|---|
| 1 | 95524 | Bayside | 100 | A |
| 2 | 95540 | Fortuna | 100 | A |
| 3 | 95562 | Rio Dell | 100 | A |
| 4 | 95589 | Whitethorn | 100 | A |
| 5 | 95521 | Arcata | 99 | A |
| 6 | 95525 | Blue Lake | 99 | A |
| 7 | 95519 | Mckinleyville | 98 | A |
| 8 | 95472 | Sebastopol | 96 | A |
| 9 | 95546 | Hoopa | 95 | A |
10 Riskiest ZIP Codes
| Rank | ZIP | City | Score | Grade | Risk Factor |
|---|---|---|---|---|---|
| 1 | 95546 | Hoopa | 95 | A | 3 violation(s) |
| 2 | 95472 | Sebastopol | 96 | A | 4 violations |
| 3 | 95519 | Mckinleyville | 98 | A | 2 violation(s) |
| 4 | 95525 | Blue Lake | 99 | A | 1 violation(s) |
| 5 | 95521 | Arcata | 99 | A | 1 violation(s) |
| 6 | 95589 | Whitethorn | 100 | A | — |
| 7 | 95562 | Rio Dell | 100 | A | — |
| 8 | 95540 | Fortuna | 100 | A | — |
| 9 | 95524 | Bayside | 100 | A | — |
Most Common Contaminant Violations
| Contaminant | Violations | ZIPs Affected |
|---|---|---|
| Stage 2 DBP Rule | 18 | 9 |
| Stage 1 DBP Rule | 2 | 2 |
| Total Trihalomethanes (TTHM) | 1 | 1 |
| Haloacetic Acids (HAA5) | 1 | 1 |
Lead Risk
- Average of reported 90th-percentile lead results: 0.0021 mg/L (below EPA action level)
- 0 of 24 ZIP codes with known status exceed EPA lead action level
- 17% of housing built before 1950
- 41% of housing built before 1970
Cities in This Metro
- Sebastopol, CA — 2 ZIP codes
- Arcata, CA — 2 ZIP codes
- Alderpoint, CA — 1 ZIP code
- Blocksburg, CA — 1 ZIP code
- Mckinleyville, CA — 1 ZIP code
- Bayside, CA — 1 ZIP code
- Blue Lake, CA — 1 ZIP code
- Bridgeville, CA — 1 ZIP code
- Carlotta, CA — 1 ZIP code
- Cutten, CA — 1 ZIP code
- Ferndale, CA — 1 ZIP code
- Fortuna, CA — 1 ZIP code
- Garberville, CA — 1 ZIP code
- Honeydew, CA — 1 ZIP code
- Hoopa, CA — 1 ZIP code
- Hydesville, CA — 1 ZIP code
- Kneeland, CA — 1 ZIP code
- Korbel, CA — 1 ZIP code
- Loleta, CA — 1 ZIP code
- Mad River, CA — 1 ZIP code
- Miranda, CA — 1 ZIP code
- Myers Flat, CA — 1 ZIP code
- Orick, CA — 1 ZIP code
- Orleans, CA — 1 ZIP code
- Petrolia, CA — 1 ZIP code
- Phillipsville, CA — 1 ZIP code
- Redway, CA — 1 ZIP code
- Rio Dell, CA — 1 ZIP code
- Scotia, CA — 1 ZIP code
- Somes Bar, CA — 1 ZIP code
...and 8 more cities
All 40 ZIP Codes Ranked
View complete ranking
| Rank | ZIP | City | Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 95524 | Bayside | 100 | A | 0 |
| 2 | 95540 | Fortuna | 100 | A | 0 |
| 3 | 95562 | Rio Dell | 100 | A | 0 |
| 4 | 95589 | Whitethorn | 100 | A | 0 |
| 5 | 95521 | Arcata | 99 | A | 1 |
| 6 | 95525 | Blue Lake | 99 | A | 1 |
| 7 | 95519 | Mckinleyville | 98 | A | 2 |
| 8 | 95472 | Sebastopol | 96 | A | 4 |
| 9 | 95546 | Hoopa | 95 | A | 3 |
| 10 | 95511 | Alderpoint | — | — | — |
| 11 | 95514 | Blocksburg | — | — | — |
| 12 | 95526 | Bridgeville | — | — | — |
| 13 | 95528 | Carlotta | — | — | — |
| 14 | 95536 | Ferndale | — | — | 0 |
| 15 | 95542 | Garberville | — | — | 0 |
| 16 | 95545 | Honeydew | — | — | 0 |
| 17 | 95547 | Hydesville | — | — | 0 |
| 18 | 95549 | Kneeland | — | — | 0 |
| 19 | 95550 | Korbel | — | — | 1 |
| 20 | 95551 | Loleta | — | — | 0 |
| 21 | 95552 | Mad River | — | — | — |
| 22 | 95553 | Miranda | — | — | 0 |
| 23 | 95554 | Myers Flat | — | — | — |
| 24 | 95555 | Orick | — | — | 3 |
| 25 | 95556 | Orleans | — | — | 3 |
| 26 | 95558 | Petrolia | — | — | — |
| 27 | 95560 | Redway | — | — | — |
| 28 | 95565 | Scotia | — | — | 0 |
| 29 | 95568 | Somes Bar | — | — | — |
| 30 | 95569 | Redcrest | — | — | 0 |
| 31 | 95570 | Trinidad | — | — | 1 |
| 32 | 95571 | Weott | — | — | 0 |
| 33 | 95573 | Willow Creek | — | — | 3 |
| 34 | 95595 | Zenia | — | — | — |
| 35 | 96031 | Forks Of Salmon | — | — | — |
Data Sources
- Water quality: EPA SDWIS
- Housing: U.S. Census Bureau American Community Survey
- Flood: FEMA NFIP
- Flood scope: historical NFIP claim records and claim-rated-zone evidence; this is not current property-map coverage.
Reporting periods vary by source; the page metadata identifies this materialization.
Methodology
Model 4.0.0 averages SDWIS water compliance and UCMR5 PFAS within drinking water, then averages drinking water, county radon, and annual AQI as three equal domains. All four inputs are required. Score methodology → · Rankings methodology →
Model 4.0.0 averages SDWIS water compliance and UCMR5 PFAS within drinking water, then averages drinking water, county radon, and annual AQI as three equal domains. All four inputs are required. Score methodology → · Rankings methodology →
Disclaimer: Scores are based on EPA SDWIS reported data and are not a guarantee of current water safety. Water quality can change. For the most current information, contact your local water utility or request a Consumer Confidence Report.
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How to cite this page
APA
ZipCheckup. (2026). Humboldt County, California Home Safety Rankings - 40 ZIPs. https://zipcheckup.com/rankings/metro/humboldt-california/
BibTeX
@misc{zipcheckup-rankings-metro-humboldt-california,
author = {{ZipCheckup}},
title = {{Humboldt County, California Home Safety Rankings - 40 ZIPs}},
year = {2026},
url = {https://zipcheckup.com/rankings/metro/humboldt-california/}
}
Page version: October 2026.
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