This map shows modeled outdoor noise across South Redlands 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 4,638 South Redlands residents, or 38.5%, live above that level. By land area, 46.3% of South Redlands is above 55 dBA.
See how noise in South Redlands compares to similar-sized neighborhoods.
Noise by Part of South Redlands
Average noise levels for South Redlands residents, grouped by direction from the center of South Redlands. Northern South Redlands carries the highest population-weighted average; Central South Redlands carries the lowest. Just 12% of residents in Central South Redlands live in blocks above the EPA's 55 dBA threshold, a third of the share in Northern South Redlands.
Central South Redlands
12% of people above 55 dBA
Eastern South Redlands
48% of people above 55 dBA
Northern South Redlands
48% of people above 55 dBA
Southern South Redlands
21% of people above 55 dBA
Western South Redlands
27% of people above 55 dBA
Northern South Redlands sounds about 66% louder than Central South Redlands to the human ear, a 7.3 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 San Bernardino Fwy do you need to be?
San Bernardino Fwy produces an estimated 79 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 9% of South Redlands sits under tree canopy (lighter than most neighborhoods) and roughly 36% 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.