Johnston, IA Noise Levels
Is Johnston, IA noisy?
Johnston, IA sits below the 45 dB(A) floor BTS's transportation noise model measures at all, road, rail and aircraft alike. Johnston's reading comes from a single sampled point, not a block-by-block sweep, so a specific address here could genuinely differ.
Where Johnston ranks
Johnston, IA sits among 8,515 US places this dataset covers with no measurable transportation noise, out of 12,137 places checked overall. Population is about 25,022, 1,608th largest of the 12,137 places covered here.
Your street may differ from Johnston's reading
This page describes Johnston as a whole. If one specific address is what matters, BTS publishes the same underlying map for free.
Behind Johnston's reading
The methodology guide shows exactly how Johnston's reading was built from BTS's tile data. Johnston isn't the only surprise: the guide to why big cities show up quiet covers why this happens.