St. Louis, MO Noise Levels
Noise levels in St. Louis, MO
At 47.5 dB(A), St. Louis, MO 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 road 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 St. Louis, not a street-by-street survey of the whole place.
Where St. Louis'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 St. Louis
Upgraded windows, door seals and STC-rated glazing meaningfully cut broadband, near-continuous road noise.
How St. Louis compares nationally
St. Louis ranks 1,792 of 3,622 measured places nationally, 1 being the loudest this dataset covers. About 279,695 people live there, making it the 82th largest place in this dataset.
Checking one address in St. Louis
St. Louis's figure above is a town-wide reading. For one exact address, BTS's own map is the free, authoritative source.
Where St. Louis'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 road traffic calls for a different fix than the other two sources.