Noise Levels in 20111, VA | Find Quiet Neighborhoods With Our Sound Map
54 dBA
Average noise across 20111
Quiet office to normal conversation
10,339
Residents above the EPA 55 dBA threshold
30% of 20111 residents
89 dBA
Loudest residential point
Lawnmower at 1 m
This map shows modeled outdoor noise across 20111 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 10,339 20111 residents, or 29.6%, live above that level. By land area, 36.2% of 20111 is above 55 dBA.
Average noise levels for 20111 residents, grouped by direction from the center of 20111. Central 20111 carries the highest population-weighted average; Northern 20111 carries the lowest. Just 25% of residents in Northern 20111 live in blocks above the EPA's 55 dBA threshold, about two-thirds of the share in Central 20111.
Central 20111
55.7 dBA · Moderate-loud
Quiet office to normal conversation
40% of people above 55 dBA
QuietLoud
Eastern 20111
54.2 dBA · Moderate-loud
Quiet office to normal conversation
25% of people above 55 dBA
QuietLoud
Northern 20111
52.4 dBA · Moderate
Quiet office to normal conversation
25% of people above 55 dBA
QuietLoud
Southern 20111
54.7 dBA · Moderate-loud
Quiet office to normal conversation
25% of people above 55 dBA
QuietLoud
Western 20111
55.4 dBA · Moderate-loud
Quiet office to normal conversation
42% of people above 55 dBA
QuietLoud
Central 20111 sounds about 26% louder than Northern 20111 to the human ear, a 3.3 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 Manassas Dr do you need to be?
Manassas Dr produces an estimated 68 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
68 dBA
Highway traffic 50 ft away
165 ft
56 dBA
Quiet office to normal conversation
330 ft
49 dBA
Quiet office
660 ft
42 dBA
Quiet suburban street at night
¼ mile
35 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 42% of 20111 sits under tree canopy (heavier than most zip codes) and roughly 30% 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 20111. 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.
Airport Noise
Washington Dulles International (IAD) sits north of 20111. 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 20111, particularly to the south, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across 20111
The bar chart below shows the share of 20111 residents in each noise band. About 50% of residents live below the EPA's 55 dBA threshold, and roughly 10% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How 20111 Compares
20111 sits at the quieter end of the spectrum. Below: how 20111's average outdoor noise and share of residents above the EPA threshold compare with 20109, 20120, 22033, and 20110.
Average noise level (dBA)
20111's 54.1 dBA pop-weighted average is at the quieter end of the spectrum. Virginia as a whole averages 52.8 dBA and the U.S. averages 52.0 dBA. Both are lower than 20111 because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 29.6% of 20111 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, 36.2% of 20111's footprint sits above 55 dBA, against a Virginia average of 30.0% and a national average of 28.1%.
What This Means if You're Moving to 20111
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 Manassas Dr 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 42% of 20111 is under tree cover (heavier than most zip codes), and the dominant land cover is low-density developed open space. 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. Washington Dulles International's approach paths concentrate aviation noise to the north. Neighborhoods to the south 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.
