Noise Levels in Coffey Park, Santa Rosa, CA | Find Quiet Neighborhoods With Our Sound Map
52 dBA
Average noise across Coffey Park
Quiet office to normal conversation
955
Residents above the EPA 55 dBA threshold
30% of Coffey Park residents
79 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across Coffey Park 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 955 Coffey Park residents, or 30.0%, live above that level. By land area, 46.1% of Coffey Park is above 55 dBA.
53.9% below 55 dBA
46.1% above 55 dBA
See how noise in Coffey Park compares to similar-sized neighborhoods.
Noise by Part of Coffey Park
Average noise levels for Coffey Park residents, grouped by direction from the center of Coffey Park. The highest population-weighted average is in northeastern Coffey Park; the lowest is in western Coffey Park, where just 24% of residents live in blocks above the EPA's 55 dBA threshold, roughly the same as the share in the loudest section.
Northeastern Coffey Park
64.0 dBA · Loud
Busy restaurant
Eastern Coffey Park
61.5 dBA · Loud
Busy restaurant
Northwestern Coffey Park
58.8 dBA · Loud
Normal conversation an arm’s length away
Southwestern Coffey Park
56.1 dBA · Moderate-loud
Normal conversation an arm’s length away
Western Coffey Park
53.2 dBA · Moderate-loud
Quiet office to normal conversation
To the human ear, noise in northeastern Coffey Park sounds about 111% louder than in western Coffey Park, a 10.8 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 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.
At source
79 dBA
City bus interior
165 ft
64 dBA
Busy restaurant
330 ft
55 dBA
Quiet office to normal conversation
660 ft
47 dBA
Quiet office
¼ mile
38 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 3% of Coffey Park sits under tree canopy (much lighter than most neighborhoods) and roughly 56% 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.
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Rail Noise
Active freight rail runs through parts of Coffey Park. For most blocks the rail-only contribution is small. Combined road-plus-rail noise rarely exceeds road noise on its own. The exceptions are the handful of blocks within roughly a quarter mile of the right-of-way during pass-through hours.
Use the Rail toggle on the map above to isolate rail's contribution from road and aviation.
How Noise Is Distributed Across Coffey Park
The bar chart below shows the share of Coffey Park residents in each noise band. About 86% of residents live below the EPA's 55 dBA threshold, and roughly 1% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Coffey Park Compares
Coffey Park sits the lowest among the peer group. Below: how Coffey Park's average outdoor noise and share of residents above the EPA threshold compare with Junior College Neighborhood Assc., west-junior-college-santa-rosa-ca, Larkfield-Wikiup, and East Petaluma.
Average noise level (dBA)
Coffey Park's 52.4 dBA pop-weighted average is the lowest among the peer group. California as a whole averages 54.0 dBA and the U.S. averages 52.0 dBA. Both are lower than Coffey Park because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 30.0% of Coffey Park residents live in blocks where outdoor levels exceed the EPA's 55 dBA threshold. That's in the middle of its peer group. Measured by land area instead, 46.1% of Coffey Park's footprint sits above 55 dBA, against a California average of 36.0% and a national average of 28.1%.
What This Means if You're Moving to Coffey Park
- Distance from highways matters more than the neighborhood name. Two homes in the same zip code can differ by 20 dBA if one sits 100 meters from and the other 500 meters away. The model captures this at 100-meter resolution, so noise exposure changes block by block.
- Tree canopy can help reduce modeled noise exposure. Roughly 3% of Coffey Park is under tree cover (much lighter than most neighborhoods), and the dominant land cover is medium-intensity developed land. Both are measured from federal USDA Forest Service and USGS satellite imagery at 30-meter resolution. Streets with 60% or higher canopy show 3 to 5 dBA lower noise than comparable streets with bare ground or pavement, which is why the per-place decay rate above already accounts for it.
