This map shows modeled outdoor noise across San Jacinto 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 11,954 San Jacinto residents, or 24.1%, live above that level. By land area, 21.6% of San Jacinto is above 55 dBA.
See how noise in San Jacinto compares to similar-sized cities.
Noise by Part of San Jacinto
Average noise levels for San Jacinto residents, grouped by direction from the center of San Jacinto. Southern San Jacinto carries the highest population-weighted average; Eastern San Jacinto carries the lowest. Just 22% of residents in Eastern San Jacinto live in blocks above the EPA's 55 dBA threshold, roughly the same as the share in Southern San Jacinto.
Central San Jacinto
21% of people above 55 dBA
Eastern San Jacinto
22% of people above 55 dBA
Northern San Jacinto
23% of people above 55 dBA
Southern San Jacinto
17% of people above 55 dBA
Western San Jacinto
29% of people above 55 dBA
Southern San Jacinto sounds about 10% louder than Eastern San Jacinto to the human ear, a 1.4 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 70 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 San Jacinto sits under tree canopy (much lighter than most cities) and roughly 42% 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.