2026 Compare Cities Health:
Castro Valley, CA vs Twain Harte, CA

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Highlights
- There are 201 physicians per 100,000 people in Twain Harte.
- There are 226 physicians per 100,000 people in Castro Valley.
- The US average is 210 physicians per 100,000 people.
 Castro Valley, CATwain Harte, CAUnited States
 Air Quality (100=best)  Unlock81.358.4
 Water Quality (100=best)32  Unlock55
 Superfund Sites (100=best)  Unlock87.886.9
 Physicians per Cap.226  Unlock210
 Health Cost  Unlock109100
   (100 = best)
Reviews for Castro Valley    7 Reviews

CURMUDGEON - THANK YOU for your post. The most important part of your comment is your second paragraph. "Hodge-Podge" is the correct word for a lot of Castro  More

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Over 12 years ago

Kind of rural but close to Oakland and San  More

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Castro Valley is the largest unincorporated "city" in the Bay Area. Over the years, several attempts have been made to incorporate, but they have all been defeated at  More

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Reviews for Twain Harte    2 Reviews

Over 5 years ago

We have been coming to Twain Harte for over 50 years. We moved here in 2018 and have enjoyed every minute of it! The weather is just excellent, great change of seasons  More

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Over 16 years ago

Twain Harte is a lovely small town in the Sierra Foothills. This county is very close knit and watch out for each other. Its difficult to make a living but the beauty  More

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