This map shows modeled outdoor noise across 02539 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 1,050 02539 residents, or 21.3%, live above that level. By land area, 25.7% of 02539 is above 55 dBA.
See how noise in 02539 compares to similar-sized zip codes.
Noise by Part of 02539
Average noise levels for 02539 residents, grouped by direction from the center of 02539. Northern 02539 carries the highest population-weighted average; Central 02539 carries the lowest. Just 6% of residents in Central 02539 live in blocks above the EPA's 55 dBA threshold, a third of the share in Northern 02539.
Central 02539
6% of people above 55 dBA
Eastern 02539
29% of people above 55 dBA
Northern 02539
32% of people above 55 dBA
Southern 02539
15% of people above 55 dBA
Western 02539
13% of people above 55 dBA
Northern 02539 sounds about 40% louder than Central 02539 to the human ear, a 4.9 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 79 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 quiet suburban street at night.
Calculated from the model's calibrated attenuation formula. About 49% of 02539 sits under tree canopy (heavier than most zip codes) and roughly 13% 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.