Marcus, IA Noise Levels
Marcus, IA: what the federal noise map shows
At Marcus, IA, 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 Marcus, not a street-by-street survey of the whole place.
Where Marcus ranks
Marcus, IA sits among 8,515 US places this dataset covers with no measurable transportation noise, out of 12,137 places checked overall. Population is about 1,069, 9,993th largest of the 12,137 places covered here.
Your street may differ from Marcus's reading
For a single house or lot in Marcus 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 Marcus's figure, see the methodology guide. The guide to reading a quiet result explains what "no measurable noise" actually means at Marcus.