This map shows modeled outdoor noise across 91384 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 5,075 91384 residents, or 19.3%, live above that level. By land area, 28.1% of 91384 is above 55 dBA.
See how noise in 91384 compares to similar-sized zip codes.
Noise by Part of 91384
Average noise levels for 91384 residents, grouped by direction from the center of 91384. Central 91384 carries the highest population-weighted average; Western 91384 carries the lowest. Just 18% of residents in Western 91384 live in blocks above the EPA's 55 dBA threshold, three-quarters of the share in Central 91384.
Central 91384
22% of people above 55 dBA
Eastern 91384
6% of people above 55 dBA
Northern 91384
26% of people above 55 dBA
Southern 91384
23% of people above 55 dBA
Western 91384
18% of people above 55 dBA
Central 91384 sounds about 108% louder than Western 91384 to the human ear, a 10.6 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 Golden State Fwy do you need to be?
Golden State Fwy produces an estimated 78 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 4% of 91384 sits under tree canopy (much lighter than most zip codes) and roughly 25% 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.