This map shows modeled outdoor noise across 93440 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 656 93440 residents, or 36.7%, live above that level. By land area, 32.1% of 93440 is above 55 dBA.
See how noise in 93440 compares to similar-sized zip codes.
Noise by Part of 93440
Average noise levels for 93440 residents, grouped by direction from the center of 93440. Northern 93440 carries the highest population-weighted average; Southern 93440 carries the lowest. Just 4% of residents in Southern 93440 live in blocks above the EPA's 55 dBA threshold, a fifth of the share in Northern 93440.
Central 93440
38% of people above 55 dBA
Eastern 93440
40% of people above 55 dBA
Northern 93440
49% of people above 55 dBA
Southern 93440
4% of people above 55 dBA
Western 93440
35% of people above 55 dBA
Northern 93440 sounds about 359% louder than Southern 93440 to the human ear, a 22.0 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 81 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 2% of 93440 sits under tree canopy (much lighter than most zip codes) and roughly 19% 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.