EMF Exposure in San Jose, CA
San Jose ranks #3 of 4 California cities for EMF exposure. Lower score = less exposure.
With an EMF exposure score of 91 out of 100, this major Silicon Valley metropolitan area ranks as the third-highest among California's four largest cities for electromagnetic field exposure levels. San Jose's substantial wireless infrastructure includes 1,307 total cell towers, with 414 supporting 5G technology, creating a tower density of 7.4 installations per square mile across the city's geography. EMF exposure levels vary significantly throughout different neighborhoods, with measurements ranging from 0 to 100 on our assessment scale.
Tower Map
Showing 1307 towers within 5 miles of San Jose city center.
Other Cities in California
Lowest EMF exposure cities in California. Lower score = less exposure.
Cities with Similar Scores
Other US cities with EMF scores within 10 points of San Jose.
San Jose's EMF exposure score of 91 ranks as the second-highest among major California cities, significantly exceeding both the state average of 83 and more than doubling the national median of 45. While all major California metropolitan areas show elevated EMF levels compared to national norms, residents concerned about electromagnetic exposure might find San Diego (score: 59) offers a notably lower-EMF environment while still providing urban amenities. San Jose's very high ranking likely reflects the concentration of tech infrastructure and dense urban development characteristic of Silicon Valley.
EMF Exposure & Health
EMF exposure remains an active area of scientific research. While regulatory bodies maintain that current exposure limits are safe, independent research has raised questions that lead many to take precautionary steps.
What research shows
We provide data, not medical advice. Consult healthcare professionals for personal health decisions.
What You Can Do
Check Your Specific Address
City averages only tell part of the story. Your building's exposure depends on exact tower proximity, building materials, and which direction you face.
Enter Your AddressIf You're House Hunting
Before buying or renting in San Jose, check the EMF score of specific addresses you're considering. Compare neighborhoods to find lower-exposure areas.
- Search each property address on our map
- Note which direction bedrooms face relative to towers
- Consider upper vs lower floors (height affects exposure)
Quick Wins (Free)
Simple changes you can make today to reduce your daily EMF exposure without spending money.
- Move WiFi router out of bedrooms and living areas
- Use airplane mode on phone while sleeping
- Use speakerphone or wired earbuds for calls
- Turn off WiFi at night (use a timer outlet)
- Keep phone out of pockets when possible
For San Jose specifically:
Bigger Investments
For those wanting more comprehensive protection, especially in high-exposure areas.
- EMF shielding film for windows facing towers
- Shielding paint for walls on tower-facing sides
- Shielded bed canopy for sleeping area
- Professional EMF assessment of your home
- Wired ethernet instead of WiFi