This map shows modeled outdoor noise across 24380 at 100-meter resolution, combining road, aviation, and rail sources. Green areas measure below 45 dBA. Orange and red exceed the EPA's 55 dBA outdoor threshold linked to long-term health effects. Use the layer toggles to view each source on its own or all together.
What the numbers sound like
- 30 dBAWhisper
- 40 dBASoft rainfall
- 45 dBAQuiet suburban street at night
- 50 dBAQuiet office
- 55 dBAEPA outdoor threshold: light traffic 100 ft away
- 60 dBANormal conversation an arm's length away
- 65 dBABusy restaurant
- 70 dBAHighway traffic 50 ft away
- 80 dBACity bus interior
Population Above the EPA Outdoor Threshold
The EPA's 55 dBA outdoor reference level is a common benchmark for residential noise exposure, especially for activity interference, annoyance, and long-term community noise concerns. About 49 24380 residents, or 1.9%, live above that level. By land area, 2.3% of 24380 is above 55 dBA.
See how noise in 24380 compares to similar-sized zip codes.
Noise by Part of 24380
Average noise levels for 24380 residents, grouped by direction from the center of 24380. Eastern 24380 carries the highest population-weighted average; Central 24380 carries the lowest. Just 0% of residents in Central 24380 live in blocks above the EPA's 55 dBA threshold, a fifth of the share in Eastern 24380.
Central 24380
0% of people above 55 dBA
Eastern 24380
3% of people above 55 dBA
Northern 24380
1% of people above 55 dBA
Southern 24380
1% of people above 55 dBA
Western 24380
3% of people above 55 dBA
Eastern 24380 sounds about 87% louder than Central 24380 to the human ear, a 9.0 dBA gap. Every 10 dBA roughly doubles perceived loudness. Within any of these directions, two homes a quarter mile apart can still differ by 10 or more dBA depending on how close they sit to a major highway.
How far back from do you need to be?
produces an estimated 63 dBA at its loudest centerline points. Noise drops logarithmically with distance, with the exact rate depending on what's between you and the road. Tree cover, walls, terrain, and pavement type all matter. At roughly a quarter mile back, traffic fades into the noise level of a soft rainfall.
Calculated from the model's calibrated attenuation formula. About 58% of 24380 sits under tree canopy (much heavier than most zip codes) and roughly 0% is impervious surface like pavement and rooftops. Both are folded into the per-place decay rate above. Heavier canopy pulls noise down faster with distance; impervious surfaces slow the drop.