Barnwell, SC Noise Levels
Barnwell, SC: what the federal noise map shows
At Barnwell, SC, road, rail and aircraft noise all fall below the 45 dB(A) floor BTS's national map can distinguish from silence. Barnwell's reading comes from a single sampled point, not a block-by-block sweep, so a specific address here could genuinely differ.
Where Barnwell ranks
There's no loudness rank for Barnwell: it's one of 8,515 places nationally where BTS's model measures nothing above its 45 dB(A) floor. About 4,589 people live there, making it the 5,125th largest place in this dataset.
Your street may differ from Barnwell's reading
For a single house or lot in Barnwell 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 Barnwell's figure, see the methodology guide. The guide to reading a quiet result explains what "no measurable noise" actually means at Barnwell.