Springville, IA Noise Levels
Springville, IA: what the federal noise map shows
Springville, IA's 70-79.9 dB(A) band spans one of HUD's zone boundaries, so the honest answer is a range: somewhere between "Normally Unacceptable" (65-75 dB(A)) and "Unacceptable" (above 75 dB(A)), not one clean verdict. Road traffic drives that number here, not the other two sources. Springville's reading comes from a single sampled point, not a block-by-block sweep, so a specific address here could genuinely differ.
Springville's noise, by source
Each of the three transportation modes gets its own model from BTS; the combined figure above is what they add up to.
What this means for a house here
That also clears FHWA's own 66 dB(A) impact threshold for residential land use (23 CFR 772, Table 1), the level highway agencies use to decide whether a new road needs a sound wall. Upgraded windows, door seals and STC-rated glazing meaningfully cut broadband, near-continuous road noise.
Where Springville ranks
Among the 3,622 US places in this dataset with any measurable transportation noise, Springville ranks 60, loudest first. By population, it ranks 9,708 of the 12,137 places in this dataset, home to about 1,161 people.
Your street may differ from Springville's reading
For a single house or lot in Springville 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 Springville's figure, see the methodology guide. Since road traffic is what's driving this reading, the guide to what actually cuts each kind of noise covers the fix that fits.