This map shows modeled outdoor noise across Leland Grove 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 518 Leland Grove residents, or 28.3%, live above that level. By land area, 28.6% of Leland Grove is above 55 dBA.
See how noise in Leland Grove compares to similar-sized cities.
Noise by Part of Leland Grove
Average noise levels for Leland Grove residents, grouped by direction from the center of Leland Grove. Northern Leland Grove carries the highest population-weighted average; Western Leland Grove carries the lowest. Just 10% of residents in Western Leland Grove live in blocks above the EPA's 55 dBA threshold, a third of the share in Northern Leland Grove.
Central Leland Grove
23% of people above 55 dBA
Eastern Leland Grove
54% of people above 55 dBA
Northern Leland Grove
32% of people above 55 dBA
Southern Leland Grove
37% of people above 55 dBA
Western Leland Grove
10% of people above 55 dBA
Northern Leland Grove sounds about 26% louder than Western Leland Grove to the human ear, a 3.3 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 Cherry Rd do you need to be?
Cherry Rd produces an estimated 55 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 36% of Leland Grove sits under tree canopy (about average for cities) 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.