This map shows modeled outdoor noise across South Corvallis Neighbors 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 1,056 South Corvallis Neighbors residents, or 25.4%, live above that level. By land area, 24.6% of South Corvallis Neighbors is above 55 dBA.
See how noise in South Corvallis Neighbors compares to similar-sized neighborhoods.
Noise by Part of South Corvallis Neighbors
Average noise levels for South Corvallis Neighbors residents, grouped by direction from the center of South Corvallis Neighbors. The highest population-weighted average is in northern South Corvallis Neighbors; the lowest is in southeastern South Corvallis Neighbors, where just 8% of residents live in blocks above the EPA's 55 dBA threshold, a fifth of the share in the loudest section.
Northern South Corvallis Neighbors
44% of people above 55 dBA
Western South Corvallis Neighbors
18% of people above 55 dBA
Southern South Corvallis Neighbors
28% of people above 55 dBA
Northeastern South Corvallis Neighbors
14% of people above 55 dBA
Southeastern South Corvallis Neighbors
8% of people above 55 dBA
To the human ear, noise in northern South Corvallis Neighbors sounds about 64% louder than in southeastern South Corvallis Neighbors, a 7.1 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 Oregon Route 99W do you need to be?
Oregon Route 99W produces an estimated 67 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 23% of South Corvallis Neighbors sits under tree canopy (heavier than most neighborhoods) and roughly 41% 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.