This map shows modeled outdoor noise across Marina West 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 1,734 Marina West residents, or 51.2%, live above that level. By land area, 53.1% of Marina West is above 55 dBA.
See how noise in Marina West compares to similar-sized neighborhoods.
Noise by Part of Marina West
Average noise levels for Marina West residents, grouped by direction from the center of Marina West. Western Marina West carries the highest population-weighted average; Central Marina West carries the lowest. Just 46% of residents in Central Marina West live in blocks above the EPA's 55 dBA threshold, three-quarters of the share in Western Marina West.
Central Marina West
46% of people above 55 dBA
Eastern Marina West
70% of people above 55 dBA
Northern Marina West
27% of people above 55 dBA
Southern Marina West
75% of people above 55 dBA
Western Marina West
68% of people above 55 dBA
Western Marina West sounds about 73% louder than Central Marina West to the human ear, a 7.9 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 3% of Marina West sits under tree canopy (much lighter than most neighborhoods) and roughly 53% 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.