Alton, IA Noise Levels
Noise levels in Alton, IA
At 47.5 dB(A), Alton, IA falls inside HUD's "Acceptable" noise zone, 65 dB(A) day-night average or below under 24 CFR 51.104, the federal government's own line for building housing with no extra sound attenuation required. Treat this as Alton's one representative point, not a promise about every block in it, BTS's map wasn't built to resolve individual streets.
Where Alton's noise comes from
BTS models these three sources separately before combining them, so a place can be quiet on two and loud on the third.
How Alton compares nationally
Alton ranks 3,260 of 3,622 measured places nationally, 1 being the loudest this dataset covers. About 1,248 people live there, making it the 9,439th largest place in this dataset.
Checking one address in Alton
Alton's figure above is a town-wide reading. For one exact address, BTS's own map is the free, authoritative source.
Where Alton's figures come from
Every dB(A) figure on this page traces to a named BTS dataset, documented in the methodology guide. Curious why Alton reads as quiet? The explanation of what a quiet result actually means covers it.