San Marcos, TX Noise Levels
Noise levels in San Marcos, TX
At 52.5 dB(A), San Marcos, TX 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. Treat this as San Marcos's one representative point, not a promise about every block in it, BTS's map wasn't built to resolve individual streets.
Where San Marcos'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 San Marcos
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 San Marcos compares nationally
San Marcos ranks 831 of 3,622 measured places nationally, 1 being the loudest this dataset covers. About 74,316 people live there, making it the 521th largest place in this dataset.
Checking one address in San Marcos
San Marcos's figure above is a town-wide reading. For one exact address, BTS's own map is the free, authoritative source.
Where San Marcos'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.