This map shows modeled outdoor noise across 92250 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 1,194 92250 residents, or 16.8%, live above that level. By land area, 10.8% of 92250 is above 55 dBA.
See how noise in 92250 compares to similar-sized zip codes.
Noise by Part of 92250
Average noise levels for 92250 residents, grouped by direction from the center of 92250. Northern 92250 carries the highest population-weighted average; Western 92250 carries the lowest. Just 12% of residents in Western 92250 live in blocks above the EPA's 55 dBA threshold, about half the share in Northern 92250.
Central 92250
25% of people above 55 dBA
Eastern 92250
8% of people above 55 dBA
Northern 92250
25% of people above 55 dBA
Southern 92250
11% of people above 55 dBA
Western 92250
12% of people above 55 dBA
Northern 92250 sounds about 38% louder than Western 92250 to the human ear, a 4.6 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 I-8 do you need to be?
I-8 produces an estimated 74 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 0% of 92250 sits under tree canopy (much lighter than most zip codes) and roughly 28% 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.