Noise Levels in North Main, Greenville, SC | Find Quiet Neighborhoods With Our Sound Map
52 dBA
Average noise across North Main
Quiet office to normal conversation
1,206
Residents above the EPA 55 dBA threshold
18% of North Main residents
73 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across North Main 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 1,206 North Main residents, or 18.4%, live above that level. By land area, 22.1% of North Main is above 55 dBA.
77.9% below 55 dBA
22.1% above 55 dBA
See how noise in North Main compares to similar-sized neighborhoods.
Noise by Part of North Main
Average noise levels for North Main residents, grouped by direction from the center of North Main. The highest population-weighted average is in northeastern North Main; the lowest is in eastern North Main, where just 18% of residents live in blocks above the EPA's 55 dBA threshold, roughly the same as the share in the loudest section.
Northeastern North Main
57.2 dBA · Moderate-loud
Normal conversation an arm’s length away
Southwestern North Main
56.3 dBA · Moderate-loud
Normal conversation an arm’s length away
Central North Main
53.7 dBA · Moderate-loud
Quiet office to normal conversation
Western North Main
53.4 dBA · Moderate-loud
Quiet office to normal conversation
Eastern North Main
53.1 dBA · Moderate-loud
Quiet office to normal conversation
To the human ear, noise in northeastern North Main sounds about 33% louder than in eastern North Main, a 4.1 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 Wade Hampton Blvd do you need to be?
Wade Hampton Blvd produces an estimated 67 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
67 dBA
Highway traffic 50 ft away
165 ft
55 dBA
Quiet office to normal conversation
330 ft
48 dBA
Quiet office
660 ft
41 dBA
Soft rainfall
¼ mile
35 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 43% of North Main sits under tree canopy (much heavier than most neighborhoods) and roughly 27% 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 North Main. 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.
How Noise Is Distributed Across North Main
The bar chart below shows the share of North Main residents in each noise band. About 82% of residents live below the EPA's 55 dBA threshold, and roughly 7% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How North Main Compares
North Main sits at the louder end of the spectrum. Below: how North Main's average outdoor noise and share of residents above the EPA threshold compare with Augusta Street Area, Mayfair Estates, Woodside Cotton Mill Historic District, and Nicholtown.
Average noise level (dBA)
North Main's 51.7 dBA pop-weighted average is at the louder end of the spectrum. South Carolina as a whole averages 48.6 dBA and the U.S. averages 52.0 dBA. Both are lower than North Main because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 18.4% of North Main 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, 22.1% of North Main's footprint sits above 55 dBA, against a South Carolina average of 15.2% and a national average of 28.1%.
What This Means if You're Moving to North Main
- 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 Wade Hampton Blvd 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 43% of North Main is under tree cover (much heavier than most neighborhoods), 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.
