Petrolia, California
Petrolia has an average healthcare access score of 13/100 (Healthcare Desert) across 1 ZIP code. That's 22 points below the California state average of 35. And 31 points below the national average of 44.
People Score
Insurance, income, literacy, disability barriers (~20%)
Provider Score
Doctors, specialists, mental health, dental access (~35%)
Hospital Score
Emergency, inpatient, and screening facility access (~25%)
Travel Score
Vehicle, transit, and broadband infrastructure (~20%)
City Average
Healthcare Desert
Grade: F
1 ZIP code in Petrolia
Comparisons
Healthcare Access Map
ZIP codes in and around Petrolia. Click any dot to view its Healthcare Access Score.
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ZIP Codes in Petrolia
All 1 ZIP codes ranked by Healthcare Access Score
| # | ZIP Code | Score | Access Level | Grade | Score Bar |
|---|---|---|---|---|---|
| 1 | 95558 | 13 | Healthcare Desert | F |
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FAQ
Frequently Asked Questions About Healthcare Access in Petrolia
How good is healthcare access in Petrolia, California?
Petrolia has an average CartoChrome Healthcare Access Score of 13/100 (Healthcare Desert), measured across 1 ZIP codes inside the city. The score reflects provider density, hospital proximity, transportation access, and social-determinant barriers.
Which ZIP code in Petrolia has the best healthcare?
ZIP 95558 scores highest in Petrolia at 13/100, while ZIP 95558 scores lowest at 13/100. A 0-point gap between ZIPs in the same city usually reflects differences in specialist density and SDOH — not hospital distance.
Does Petrolia have healthcare deserts?
Yes. ZIP 95558 in Petrolia scores 13/100, qualifying as a healthcare desert (below 25/100). Even within the same city, access can collapse at the ZIP level — typically driven by specialist shortages and uninsured rates above 20%.
How many doctors are in Petrolia?
CartoChrome uses CMS NPPES provider records to connect Petrolia residents with nearby clinicians by ZIP, specialty, and travel distance. Live provider totals are refreshed through the backend data pipeline rather than estimated in this FAQ.
What ZIPs are covered for Petrolia?
Petrolia contains 1 Census ZCTA ZIP codes. CartoChrome publishes individual scores for each — see the ZIP table below. ZIP boundaries come from Census TIGER/Line shapefiles and are updated annually.
How Is This Score Calculated?
The Petrolia average healthcare access score of 13/100 is computed by averaging the Healthcare Access Scores across all 1 ZIP code in the city. Each ZIP is explained through People Score, Provider Score, Hospital Score, and Travel Score.
Read Full Methodology