Noise Levels in South Riding, VA | Find Quiet Neighborhoods With Our Sound Map
55 dBA
Average noise across South Riding
Quiet office to normal conversation
11,420
Residents above the EPA 55 dBA threshold
40% of South Riding residents
70 dBA
Loudest residential point
Highway traffic 50 ft away
This map shows modeled outdoor noise across South Riding 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 11,420 South Riding residents, or 40.4%, live above that level. By land area, 44.2% of South Riding is above 55 dBA.
55.8% below 55 dBA
44.2% above 55 dBA
See how noise in South Riding compares to similar-sized cities.
Noise by Part of South Riding
Average noise levels for South Riding residents, grouped by direction from the center of South Riding. The highest population-weighted average is in northern South Riding; the lowest is in western South Riding, where just 36% of residents live in blocks above the EPA's 55 dBA threshold, roughly the same as the share in the loudest section.
Northern South Riding
58.2 dBA · Loud
Normal conversation an arm’s length away
Northwestern South Riding
57.3 dBA · Moderate-loud
Normal conversation an arm’s length away
Central South Riding
56.5 dBA · Moderate-loud
Normal conversation an arm’s length away
Northeastern South Riding
56.1 dBA · Moderate-loud
Normal conversation an arm’s length away
Western South Riding
56.1 dBA · Moderate-loud
Normal conversation an arm’s length away
To the human ear, noise in northern South Riding sounds about 16% louder than in western South Riding, a 2.1 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
58 dBA
Normal conversation an arm’s length away
330 ft
50 dBA
Quiet office
660 ft
43 dBA
Quiet suburban street at night
¼ mile
36 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 25% of South Riding sits under tree canopy (about average for cities) and roughly 44% 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
Washington Dulles International (IAD) sits northeast of South Riding. 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 55 dBA on the map's Overall layer. Blocks on the opposite side of South Riding, particularly to the southwest, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across South Riding
The bar chart below shows the share of South Riding residents in each noise band. About 40% of residents live below the EPA's 55 dBA threshold, and roughly 12% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How South Riding Compares
South Riding sits at the quieter end of the spectrum. Below: how South Riding's average outdoor noise and share of residents above the EPA threshold compare with Fair Oaks, Chantilly, Oakton, and Haymarket.
Average noise level (dBA)
South Riding's 55.1 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 South Riding because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 40.4% of South Riding 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, 44.2% of South Riding'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 South Riding
- 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 25% of South Riding is under tree cover (about average for cities), 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.
- Airport noise is directional. Washington Dulles International's approach paths concentrate aviation noise to the northeast. Neighborhoods to the southwest of downtown show no measurable contribution from the airport.
