South Pasadena, CA Noise Levels
Is South Pasadena, CA noisy?
South Pasadena, CA reads 47.5 dB(A) on BTS's 24-hour average, 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. That figure is sampled at one coordinate, the Census Bureau's own internal point for South Pasadena, not a street-by-street survey of the whole place.
South Pasadena's noise, by source
Each of the three transportation modes gets its own model from BTS; the combined figure above is what they add up to.
Where South Pasadena ranks
Among the 3,622 US places in this dataset with any measurable transportation noise, South Pasadena ranks 2,057, loudest first. By population, it ranks 1,567 of the 12,137 places in this dataset, home to about 25,656 people.
Your street may differ from South Pasadena's reading
This page describes South Pasadena as a whole. If one specific address is what matters, BTS publishes the same underlying map for free.
Behind South Pasadena's reading
The methodology guide shows exactly how South Pasadena's reading was built from BTS's tile data. South Pasadena isn't the only surprise: the guide to why big cities show up quiet covers why this happens.