This map shows modeled outdoor noise across North 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 7,543 North Redlands residents, or 39.8%, live above that level. By land area, 48.9% of North Redlands is above 55 dBA.
See how noise in North Redlands compares to similar-sized neighborhoods.
Noise by Part of North Redlands
Average noise levels for North Redlands residents, grouped by direction from the center of North Redlands. Southern North Redlands carries the highest population-weighted average; Northern North Redlands carries the lowest. Just 26% of residents in Northern North Redlands live in blocks above the EPA's 55 dBA threshold, a third of the share in Southern North Redlands.
Central North Redlands
32% of people above 55 dBA
Eastern North Redlands
30% of people above 55 dBA
Northern North Redlands
26% of people above 55 dBA
Southern North Redlands
85% of people above 55 dBA
Western North Redlands
43% of people above 55 dBA
Southern North Redlands sounds about 141% louder than Northern North Redlands to the human ear, a 12.7 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-10 do you need to be?
I-10 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 4% of North Redlands sits under tree canopy (much lighter than most neighborhoods) and roughly 49% 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.