Noise Levels in Kemp Mill, MD | Find Quiet Neighborhoods With Our Sound Map
54 dBA
Average noise across Kemp Mill
Quiet office to normal conversation
4,714
Residents above the EPA 55 dBA threshold
36% of Kemp Mill residents
82 dBA
Loudest residential point
Food blender at arm’s length
This map shows modeled outdoor noise across Kemp Mill 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 4,714 Kemp Mill residents, or 35.9%, live above that level. By land area, 41.4% of Kemp Mill is above 55 dBA.
Average noise levels for Kemp Mill residents, grouped by direction from the center of Kemp Mill. Central Kemp Mill carries the highest population-weighted average; Western Kemp Mill carries the lowest. Just 23% of residents in Western Kemp Mill live in blocks above the EPA's 55 dBA threshold, about two-thirds of the share in Central Kemp Mill.
Central Kemp Mill
57.7 dBA · Moderate-loud
Normal conversation an arm’s length away
35% of people above 55 dBA
QuietLoud
Eastern Kemp Mill
53.0 dBA · Moderate-loud
Quiet office to normal conversation
49% of people above 55 dBA
QuietLoud
Northern Kemp Mill
50.0 dBA · Moderate
Quiet office
14% of people above 55 dBA
QuietLoud
Southern Kemp Mill
56.3 dBA · Moderate-loud
Normal conversation an arm’s length away
56% of people above 55 dBA
QuietLoud
Western Kemp Mill
49.7 dBA · Mostly quiet
Quiet office
23% of people above 55 dBA
QuietLoud
Central Kemp Mill sounds about 74% louder than Western Kemp Mill to the human ear, a 8.0 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 Capital Beltway do you need to be?
Capital Beltway 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 quiet suburban street at night.
At source
79 dBA
City bus interior
165 ft
67 dBA
Highway traffic 50 ft away
330 ft
59 dBA
Normal conversation an arm’s length away
660 ft
52 dBA
Quiet office to normal conversation
¼ mile
45 dBA
Quiet suburban street at night
½ mile
38 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 45% of Kemp Mill sits under tree canopy (heavier than most cities) and roughly 31% 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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Airport Noise
Ronald Reagan Washington Ntl (DCA) sits south of Kemp Mill. The U.S. Department of Transportation measures aviation noise around this airport directly, and the model uses those federal measurements rather than synthetic predictions.
Blocks under the approach and departure paths carry combined road-plus-aviation noise, with some exceeding 75 dBA on the map's Overall layer. Blocks on the opposite side of Kemp Mill, particularly to the north, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Kemp Mill
The bar chart below shows the share of Kemp Mill residents in each noise band. About 60% of residents live below the EPA's 55 dBA threshold, and roughly 22% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Kemp Mill Compares
Kemp Mill sits the highest among the peer group. Below: how Kemp Mill's average outdoor noise and share of residents above the EPA threshold compare with Colesville, Kensington, Glenmont, and Adelphi.
Average noise level (dBA)
Kemp Mill's 54.4 dBA pop-weighted average is the highest among the peer group. Maryland as a whole averages 52.3 dBA and the U.S. averages 52.0 dBA. Both are lower than Kemp Mill because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 35.9% of Kemp Mill 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, 41.4% of Kemp Mill's footprint sits above 55 dBA, against a Maryland average of 32.9% and a national average of 28.1%.
What This Means if You're Moving to Kemp Mill
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 Capital Beltway 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 45% of Kemp Mill is under tree cover (heavier than most cities), and the dominant land cover is low-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.
Airport noise is directional. Ronald Reagan Washington Ntl's approach paths concentrate aviation noise to the south. Neighborhoods to the north of downtown show no measurable contribution from the airport.
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.
