Noise Levels in Dewey Beach, DE | Find Quiet Neighborhoods With Our Sound Map
57 dBA
Average noise across Dewey Beach
Normal conversation an arm’s length away
111
Residents above the EPA 55 dBA threshold
40% of Dewey Beach residents
70 dBA
Loudest residential point
Highway traffic 50 ft away
This map shows modeled outdoor noise across Dewey Beach 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.
Overall
Road
Rail
Aviation
Click the map to explore
35 dBa55 dBa (EPA limit)90+ dBa
3545557090
Quietest (dBA)Loudest
Colorblind friendlyoff
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 111 Dewey Beach residents, or 39.6%, live above that level. By land area, 64.2% of Dewey Beach is above 55 dBA.
Average noise levels for Dewey Beach residents, grouped by direction from the center of Dewey Beach. Central Dewey Beach carries the highest population-weighted average; Southern Dewey Beach carries the lowest. Just 30% of residents in Southern Dewey Beach live in blocks above the EPA's 55 dBA threshold, three-quarters of the share in Central Dewey Beach.
Central Dewey Beach
58.6 dBA · Loud
Normal conversation an arm’s length away
40% of people above 55 dBA
QuietLoud
Northern Dewey Beach
56.8 dBA · Moderate-loud
Normal conversation an arm’s length away
44% of people above 55 dBA
QuietLoud
Southern Dewey Beach
52.6 dBA · Moderate
Quiet office to normal conversation
30% of people above 55 dBA
QuietLoud
Central Dewey Beach sounds about 52% louder than Southern Dewey Beach to the human ear, a 6.0 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 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.
At source
70 dBA
Highway traffic 50 ft away
165 ft
55 dBA
Quiet office to normal conversation
330 ft
47 dBA
Quiet office
660 ft
38 dBA
Soft rainfall
¼ mile
35 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 8% of Dewey Beach sits under tree canopy (lighter than most cities) and roughly 71% 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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How Noise Is Distributed Across Dewey Beach
The bar chart below shows the share of Dewey Beach residents in each noise band. About 24% of residents live below the EPA's 55 dBA threshold, and roughly 4% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Dewey Beach Compares
Dewey Beach sits the highest among the peer group. Below: how Dewey Beach's average outdoor noise and share of residents above the EPA threshold compare with Seabreeze, Cool Spring, Primehook Beach, and Riverdale.
Average noise level (dBA)
Dewey Beach's 57.1 dBA pop-weighted average is the highest among the peer group. Delaware as a whole averages 53.5 dBA and the U.S. averages 52.0 dBA. Both are lower than Dewey Beach because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 39.6% of Dewey Beach residents live in blocks where outdoor levels exceed the EPA's 55 dBA threshold. That's more than any of its peer group. Measured by land area instead, 64.2% of Dewey Beach's footprint sits above 55 dBA, against a Delaware average of 38.3% and a national average of 28.1%.
What This Means if You're Moving to Dewey Beach
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 8% of Dewey Beach is under tree cover (lighter than most cities), and the dominant land cover is high-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.
Sources & Methodology
The BestNeighborhood noise model is calibrated against nearly one million federal ground-truth measurements across four states. Road noise is computed from segment-level federal traffic data and propagated outward using physics-based acoustic decay, with attenuation rates that depend on the surrounding land cover.
All inputs are published federal datasets. Block-level noise is computed by combining road, rail, and aviation sound sources in the energy domain, the same physics used in professional environmental noise assessments. Read the full methodology.
