Rock Valley, IA Noise Levels
Rock Valley, IA: what the federal noise map shows
At Rock Valley, IA, road, rail and aircraft noise all fall below the 45 dB(A) floor BTS's national map can distinguish from silence. Treat this as Rock Valley's one representative point, not a promise about every block in it, BTS's map wasn't built to resolve individual streets.
Where Rock Valley ranks
Rock Valley is one of 8,515 places in this dataset with no measurable transportation noise at all, too quiet to rank on loudness. Population is about 4,024, 5,488th largest of the 12,137 places covered here.
Your street may differ from Rock Valley's reading
For a single house or lot in Rock Valley 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 Rock Valley's figure, see the methodology guide. The guide to reading a quiet result explains what "no measurable noise" actually means at Rock Valley.