This map shows modeled outdoor noise across 97130 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 233 97130 residents, or 36.6%, live above that level. By land area, 42.0% of 97130 is above 55 dBA.
See how noise in 97130 compares to similar-sized zip codes.
Noise by Part of 97130
Average noise levels for 97130 residents, grouped by direction from the center of 97130. Western 97130 carries the highest population-weighted average; Southern 97130 carries the lowest. Just 19% of residents in Southern 97130 live in blocks above the EPA's 55 dBA threshold, a third of the share in Western 97130.
Central 97130
43% of people above 55 dBA
Eastern 97130
40% of people above 55 dBA
Northern 97130
48% of people above 55 dBA
Southern 97130
19% of people above 55 dBA
Western 97130
68% of people above 55 dBA
Western 97130 sounds about 37% louder than Southern 97130 to the human ear, a 4.5 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 do you need to be?
produces an estimated 62 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 28% of 97130 sits under tree canopy (about average for zip codes) and roughly 32% 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.