Griswold, IA Noise Levels
Is Griswold, IA noisy?
Griswold, IA sits below the 45 dB(A) floor BTS's transportation noise model measures at all, road, rail and aircraft alike. This describes Griswold as a whole, not a specific block, the underlying BTS map resolves to about 38 meters per pixel, sampled at the town's own center point.
Where Griswold ranks
Griswold is one of 8,515 places in this dataset with no measurable transportation noise at all, too quiet to rank on loudness. About 975 people live there, making it the 10,370th largest place in this dataset.
Your street may differ from Griswold's reading
This page describes Griswold as a whole. If one specific address is what matters, BTS publishes the same underlying map for free.
Behind Griswold's reading
The methodology guide shows exactly how Griswold's reading was built from BTS's tile data. Griswold isn't the only surprise: the guide to why big cities show up quiet covers why this happens.