Monmouth, IL Noise Levels
Noise levels in Monmouth, IL
At 47.5 dB(A), Monmouth, IL 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. The main source is rail traffic, well ahead of the other two modes BTS tracks. That figure is sampled at one coordinate, the Census Bureau's own internal point for Monmouth, not a street-by-street survey of the whole place.
Where Monmouth'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.
If you're weighing a move to Monmouth
The same window and door upgrades that work on road noise also cut broadband rail noise, though very low-frequency freight rumble travels through walls, not just glass.
How Monmouth compares nationally
Monmouth ranks 2,386 of 3,622 measured places nationally, 1 being the loudest this dataset covers. Population is about 8,639, 3,540th largest of the 12,137 places covered here.
Checking one address in Monmouth
Monmouth's figure above is a town-wide reading. For one exact address, BTS's own map is the free, authoritative source.
Where Monmouth's figures come from
Every dB(A) figure on this page traces to a named BTS dataset, documented in the methodology guide. The guide to what actually cuts each kind of noise explains why rail traffic calls for a different fix than the other two sources.