Pomona, CA Noise Levels
How loud is Pomona, CA?
BTS only publishes Pomona, CA in the 70-79.9 dB(A) band, which straddles HUD's own dividing line: depending on exactly where in that range the true 24-hour average falls, this reads as "Normally Unacceptable" (65-75 dB(A)) or "Unacceptable" (above 75 dB(A)) under 24 CFR 51.104. The main source is rail traffic, well ahead of the other two modes BTS tracks. That's the reading at Pomona's Census-defined center point, not any one street, BTS's map is a live raster, not a per-address service.
Where Pomona'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 Pomona
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. 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 Pomona compares nationally
Pomona ranks 18 of 3,622 measured places nationally, 1 being the loudest this dataset covers. About 147,966 people live there, making it the 190th largest place in this dataset.
Checking one address in Pomona
Nothing here substitutes for checking one address in Pomona directly, and BTS's own map lets anyone do that at no cost.
Pomona's number isn't a one-off calculation, it comes from the same method covered 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.