San Juan Bautista, CA Noise Levels
San Juan Bautista, CA: what the federal noise map shows
San Juan Bautista, 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. Road traffic drives that number here, not the other two sources. Treat this as San Juan Bautista's one representative point, not a promise about every block in it, BTS's map wasn't built to resolve individual streets.
San Juan Bautista'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
Upgraded windows, door seals and STC-rated glazing meaningfully cut broadband, near-continuous road noise.
Where San Juan Bautista ranks
Among the 3,622 US places in this dataset with any measurable transportation noise, San Juan Bautista ranks 3,001, loudest first. About 2,118 people live there, making it the 7,474th largest place in this dataset.
Your street may differ from San Juan Bautista's reading
For a single house or lot in San Juan Bautista rather than the town-wide figure above, BTS's own map is the same free source, queried directly.
More on how this number was built
For exactly which federal dataset feeds San Juan Bautista's figure, see the methodology guide. Since road traffic is what's driving this reading, the guide to what actually cuts each kind of noise covers the fix that fits.