This map shows modeled outdoor noise across 97523 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 713 97523 residents, or 11.5%, live above that level. By land area, 10.8% of 97523 is above 55 dBA.
See how noise in 97523 compares to similar-sized zip codes.
Noise by Part of 97523
Average noise levels for 97523 residents, grouped by direction from the center of 97523. Northern 97523 carries the highest population-weighted average; Southern 97523 carries the lowest. Just 2% of residents in Southern 97523 live in blocks above the EPA's 55 dBA threshold, a fifth of the share in Northern 97523.
Central 97523
4% of people above 55 dBA
Eastern 97523
2% of people above 55 dBA
Northern 97523
24% of people above 55 dBA
Southern 97523
2% of people above 55 dBA
Western 97523
8% of people above 55 dBA
Northern 97523 sounds about 66% louder than Southern 97523 to the human ear, a 7.3 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 199 do you need to be?
US Route 199 produces an estimated 64 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 30% of 97523 sits under tree canopy (about average for zip codes) 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.