This map shows modeled outdoor noise across 93950 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 5,480 93950 residents, or 38.7%, live above that level. By land area, 52.2% of 93950 is above 55 dBA.
See how noise in 93950 compares to similar-sized zip codes.
Noise by Part of 93950
Average noise levels for 93950 residents, grouped by direction from the center of 93950. The highest population-weighted average is in northeastern 93950; the lowest is in northwestern 93950, where just 23% of residents live in blocks above the EPA's 55 dBA threshold, a third of the share in the loudest section.
Northeastern 93950
68% of people above 55 dBA
Eastern 93950
60% of people above 55 dBA
Southern 93950
26% of people above 55 dBA
Southwestern 93950
26% of people above 55 dBA
Northwestern 93950
23% of people above 55 dBA
To the human ear, noise in northeastern 93950 sounds about 64% louder than in northwestern 93950, a 7.1 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 72 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 93950 sits under tree canopy (about average for zip codes) and roughly 40% 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.