This map shows modeled outdoor noise across Crescent City 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 2,794 Crescent City residents, or 13.4%, live above that level. By land area, 19.2% of Crescent City is above 55 dBA.
See how noise in Crescent City compares to similar-sized cities.
Noise by Part of Crescent City
Average noise levels for Crescent City residents, grouped by direction from the center of Crescent City. Southern Crescent City carries the highest population-weighted average; Northern Crescent City carries the lowest. Just 2% of residents in Northern Crescent City live in blocks above the EPA's 55 dBA threshold, a fifth of the share in Southern Crescent City.
Central Crescent City
0% of people above 55 dBA
Eastern Crescent City
8% of people above 55 dBA
Northern Crescent City
2% of people above 55 dBA
Southern Crescent City
23% of people above 55 dBA
Western Crescent City
14% of people above 55 dBA
Southern Crescent City sounds about 100% louder than Northern Crescent City to the human ear, a 10.0 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 US Hwy 101 do you need to be?
US Hwy 101 produces an estimated 66 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 22% of Crescent City sits under tree canopy (lighter than most cities) and roughly 37% 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.