This map shows modeled outdoor noise across 97365 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 2,978 97365 residents, or 33.9%, live above that level. By land area, 38.1% of 97365 is above 55 dBA.
See how noise in 97365 compares to similar-sized zip codes.
Noise by Part of 97365
Average noise levels for 97365 residents, grouped by direction from the center of 97365. The highest population-weighted average is in central 97365; the lowest is in northern 97365, where just 8% of residents live in blocks above the EPA's 55 dBA threshold, a third of the share in the loudest section.
Central 97365
26% of people above 55 dBA
Southern 97365
32% of people above 55 dBA
Southwestern 97365
12% of people above 55 dBA
Southeastern 97365
11% of people above 55 dBA
Northern 97365
8% of people above 55 dBA
To the human ear, noise in central 97365 sounds about 35% louder than in northern 97365, a 4.3 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 US Route 101 do you need to be?
US Route 101 produces an estimated 65 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 31% of 97365 sits under tree canopy (about average for zip codes) and roughly 41% 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.