Portola Valley, CA Noise Levels
Is Portola Valley, CA noisy?
Portola Valley, CA sits below the 45 dB(A) floor BTS's transportation noise model measures at all, road, rail and aircraft alike. That's the reading at Portola Valley's Census-defined center point, not any one street, BTS's map is a live raster, not a per-address service.
Where Portola Valley ranks
Portola Valley, CA sits among 8,515 US places this dataset covers with no measurable transportation noise, out of 12,137 places checked overall. By population, it ranks 5,327 of the 12,137 places in this dataset, home to about 4,282 people.
Your street may differ from Portola Valley's reading
This page describes Portola Valley as a whole. If one specific address is what matters, BTS publishes the same underlying map for free.
Behind Portola Valley's reading
The methodology guide shows exactly how Portola Valley's reading was built from BTS's tile data. Portola Valley isn't the only surprise: the guide to why big cities show up quiet covers why this happens.