Noise Levels in 20832, MD | Find Quiet Neighborhoods With Our Sound Map
51 dBA
Average noise across 20832
Quiet office
4,437
Residents above the EPA 55 dBA threshold
18% of 20832 residents
73 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across 20832 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 4,437 20832 residents, or 17.9%, live above that level. By land area, 23.4% of 20832 is above 55 dBA.
Average noise levels for 20832 residents, grouped by direction from the center of 20832. Southern 20832 carries the highest population-weighted average; Western 20832 carries the lowest. Just 12% of residents in Western 20832 live in blocks above the EPA's 55 dBA threshold, about two-thirds of the share in Southern 20832.
Central 20832
49.6 dBA · Mostly quiet
Quiet office
15% of people above 55 dBA
QuietLoud
Eastern 20832
50.9 dBA · Moderate
Quiet office
19% of people above 55 dBA
QuietLoud
Northern 20832
51.6 dBA · Moderate
Quiet office to normal conversation
25% of people above 55 dBA
QuietLoud
Southern 20832
51.8 dBA · Moderate
Quiet office to normal conversation
19% of people above 55 dBA
QuietLoud
Western 20832
49.0 dBA · Mostly quiet
Quiet office
12% of people above 55 dBA
QuietLoud
Southern 20832 sounds about 21% louder than Western 20832 to the human ear, a 2.8 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 State Hwy 200 do you need to be?
State Hwy 200 produces an estimated 55 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
55 dBA
Quiet office to normal conversation
165 ft
42 dBA
Quiet suburban street at night
330 ft
35 dBA
Soft rainfall
660 ft
35 dBA
Soft rainfall
¼ mile
35 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 39% of 20832 sits under tree canopy (heavier than most zip codes) and roughly 29% 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 20832. 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 20832, 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 20832
The bar chart below shows the share of 20832 residents in each noise band. About 93% of residents live below the EPA's 55 dBA threshold, and roughly 0% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How 20832 Compares
20832 sits the lowest among the peer group. Below: how 20832's average outdoor noise and share of residents above the EPA threshold compare with 20879, 20853, 20876, and 20912.
Average noise level (dBA)
20832's 50.6 dBA pop-weighted average is the lowest among the peer group. Maryland as a whole averages 52.3 dBA and the U.S. averages 52.0 dBA. Both are lower than 20832 because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 17.9% of 20832 residents live in blocks where outdoor levels exceed the EPA's 55 dBA threshold. That's fewer than any of its peer group. Measured by land area instead, 23.4% of 20832'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 20832
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 State Hwy 200 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 39% of 20832 is under tree cover (heavier than most zip codes), 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.
