Livermore, CA Noise Levels
Livermore, CA: what the federal noise map shows
Livermore, CA reads 85 dB(A) on BTS's 24-hour average, inside HUD's "Unacceptable" noise zone, above 75 dB(A), the most severe category HUD's own housing rules recognize. Rail traffic drives that number here, not the other two sources. Treat this as Livermore's one representative point, not a promise about every block in it, BTS's map wasn't built to resolve individual streets.
Livermore'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
That also clears FHWA's own 66 dB(A) impact threshold for residential land use (23 CFR 772, Table 1), the level highway agencies use to decide whether a new road needs a sound wall. The same window and door upgrades that work on road noise also cut broadband rail noise, though very low-frequency freight rumble travels through walls, not just glass.
Where Livermore ranks
Among the 3,622 US places in this dataset with any measurable transportation noise, Livermore ranks 2, loudest first. About 84,867 people live there, making it the 430th largest place in this dataset.
Your street may differ from Livermore's reading
For a single house or lot in Livermore 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 Livermore's figure, see the methodology guide. Since rail traffic is what's driving this reading, the guide to what actually cuts each kind of noise covers the fix that fits.