Fairfield, IL Noise Levels
Fairfield, IL: what the federal noise map shows
At Fairfield, IL, road, rail and aircraft noise all fall below the 45 dB(A) floor BTS's national map can distinguish from silence. That figure is sampled at one coordinate, the Census Bureau's own internal point for Fairfield, not a street-by-street survey of the whole place.
Where Fairfield ranks
There's no loudness rank for Fairfield: it's one of 8,515 places nationally where BTS's model measures nothing above its 45 dB(A) floor. About 4,790 people live there, making it the 5,002th largest place in this dataset.
Your street may differ from Fairfield's reading
For a single house or lot in Fairfield 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 Fairfield's figure, see the methodology guide. The guide to reading a quiet result explains what "no measurable noise" actually means at Fairfield.