San Bruno, CA Noise Levels
Is San Bruno, CA noisy?
San Bruno, CA reads 47.5 dB(A) on BTS's 24-hour average, inside HUD's "Acceptable" noise zone, 65 dB(A) day-night average or below under 24 CFR 51.104, the federal government's own line for building housing with no extra sound attenuation required. Aircraft drives that number here, not the other two sources. San Bruno's reading comes from a single sampled point, not a block-by-block sweep, so a specific address here could genuinely differ.
San Bruno's noise, by source
Each of the three transportation modes gets its own model from BTS; the combined figure above is what they add up to.
What this means for a house here
Aircraft noise is intermittent and lower-frequency, which is why FAA’s Part 150 program funds whole-envelope sound insulation for homes inside an airport’s own mapped noise contour rather than relying on window replacement alone.
Where San Bruno ranks
Among the 3,622 US places in this dataset with any measurable transportation noise, San Bruno ranks 1,957, loudest first. By population, it ranks 979 of the 12,137 places in this dataset, home to about 42,035 people.
Your street may differ from San Bruno's reading
This page describes San Bruno as a whole. If one specific address is what matters, BTS publishes the same underlying map for free.
Behind San Bruno's reading
The methodology guide shows exactly how San Bruno's reading was built from BTS's tile data. Since aircraft is what's driving this reading, the guide to what actually cuts each kind of noise covers the fix that fits.