This map shows modeled outdoor noise across Mount Jackson 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 668 Mount Jackson residents, or 18.8%, live above that level. By land area, 27.1% of Mount Jackson is above 55 dBA.
See how noise in Mount Jackson compares to similar-sized cities.
Noise by Part of Mount Jackson
Average noise levels for Mount Jackson residents, grouped by direction from the center of Mount Jackson. The highest population-weighted average is in southeastern Mount Jackson; the lowest is in northwestern Mount Jackson, where just 2% of residents live in blocks above the EPA's 55 dBA threshold, a fifth of the share in the loudest section.
Southeastern Mount Jackson
11% of people above 55 dBA
Eastern Mount Jackson
10% of people above 55 dBA
Northern Mount Jackson
3% of people above 55 dBA
Western Mount Jackson
3% of people above 55 dBA
Northwestern Mount Jackson
2% of people above 55 dBA
To the human ear, noise in southeastern Mount Jackson sounds about 193% louder than in northwestern Mount Jackson, a 15.5 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 I-81 do you need to be?
I-81 produces an estimated 76 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 35% of Mount Jackson sits under tree canopy (about average for cities) and roughly 10% 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.