Decatur, AL Noise Levels
Decatur, AL: what the federal noise map shows
At Decatur, AL, road, rail and aircraft noise all fall below the 45 dB(A) floor BTS's national map can distinguish from silence. Decatur's reading comes from a single sampled point, not a block-by-block sweep, so a specific address here could genuinely differ.
Where Decatur ranks
Decatur, AL sits among 8,515 US places this dataset covers with no measurable transportation noise, out of 12,137 places checked overall. About 57,974 people live there, making it the 709th largest place in this dataset.
Your street may differ from Decatur's reading
For a single house or lot in Decatur 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 Decatur's figure, see the methodology guide. The guide to reading a quiet result explains what "no measurable noise" actually means at Decatur.