Noise Levels in Mallard Creek-Withrow Downs, Charlotte, NC | Find Quiet Neighborhoods With Our Sound Map
54 dBA
Average noise across Mallard Creek-Withrow Downs
Quiet office to normal conversation
1,447
Residents above the EPA 55 dBA threshold
35% of Mallard Creek-Withrow Downs residents
78 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across Mallard Creek-Withrow Downs 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
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35 dBa55 dBa (EPA limit)90+ dBa
3545557090
Quietest (dBA)Loudest
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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 1,447 Mallard Creek-Withrow Downs residents, or 34.6%, live above that level. By land area, 37.4% of Mallard Creek-Withrow Downs is above 55 dBA.
Average noise levels for Mallard Creek-Withrow Downs residents, grouped by direction from the center of Mallard Creek-Withrow Downs. Southern Mallard Creek-Withrow Downs carries the highest population-weighted average; Northern Mallard Creek-Withrow Downs carries the lowest. Just 0% of residents in Northern Mallard Creek-Withrow Downs live in blocks above the EPA's 55 dBA threshold, a fifth of the share in Southern Mallard Creek-Withrow Downs.
Central Mallard Creek-Withrow Downs
55.7 dBA · Moderate-loud
Quiet office to normal conversation
24% of people above 55 dBA
QuietLoud
Eastern Mallard Creek-Withrow Downs
54.1 dBA · Moderate-loud
Quiet office to normal conversation
33% of people above 55 dBA
QuietLoud
Northern Mallard Creek-Withrow Downs
45.0 dBA · Mostly quiet
Quiet suburban street at night
0% of people above 55 dBA
QuietLoud
Southern Mallard Creek-Withrow Downs
60.2 dBA · Loud
Normal conversation an arm’s length away
88% of people above 55 dBA
QuietLoud
Western Mallard Creek-Withrow Downs
51.7 dBA · Moderate
Quiet office to normal conversation
17% of people above 55 dBA
QuietLoud
Southern Mallard Creek-Withrow Downs sounds about 187% louder than Northern Mallard Creek-Withrow Downs to the human ear, a 15.2 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 I-485 do you need to be?
I-485 produces an estimated 78 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
78 dBA
City bus interior
165 ft
65 dBA
Busy restaurant
330 ft
57 dBA
Normal conversation an arm’s length away
660 ft
50 dBA
Quiet office
¼ mile
42 dBA
Quiet suburban street at night
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 36% of Mallard Creek-Withrow Downs sits under tree canopy (much heavier than most neighborhoods) and roughly 33% 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
Charlotte/Douglas International (CLT) sits southwest of Mallard Creek-Withrow Downs. 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 50 dBA on the map's Overall layer. Blocks on the opposite side of Mallard Creek-Withrow Downs, particularly to the northeast, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Mallard Creek-Withrow Downs
The bar chart below shows the share of Mallard Creek-Withrow Downs residents in each noise band. About 55% of residents live below the EPA's 55 dBA threshold, and roughly 13% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Mallard Creek-Withrow Downs Compares
Mallard Creek-Withrow Downs sits at the quieter end of the spectrum. Below: how Mallard Creek-Withrow Downs's average outdoor noise and share of residents above the EPA threshold compare with Rockwell Park-Hemphill Heights, Beatties Ford-Trinity, North Charlotte, and Newell South.
Average noise level (dBA)
Mallard Creek-Withrow Downs's 54.4 dBA pop-weighted average is at the quieter end of the spectrum. North Carolina as a whole averages 49.7 dBA and the U.S. averages 52.0 dBA. Both are lower than Mallard Creek-Withrow Downs because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 34.6% of Mallard Creek-Withrow Downs 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, 37.4% of Mallard Creek-Withrow Downs's footprint sits above 55 dBA, against a North Carolina average of 22.6% and a national average of 28.1%.
What This Means if You're Moving to Mallard Creek-Withrow Downs
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 I-485 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 36% of Mallard Creek-Withrow Downs is under tree cover (much heavier than most neighborhoods), 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. Charlotte/Douglas International's approach paths concentrate aviation noise to the southwest. Neighborhoods to the northeast 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.
