Noise Levels in Harriman, WY | Find Quiet Neighborhoods With Our Sound Map
38 dBA
Average noise across Harriman
Soft rainfall
1
Residents above the EPA 55 dBA threshold
2% of Harriman residents
83 dBA
Loudest residential point
Food blender at arm’s length
This map shows modeled outdoor noise across Harriman 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 1 Harriman residents, or 2.5%, live above that level. By land area, 1.5% of Harriman is above 55 dBA.
Average noise levels for Harriman residents, grouped by direction from the center of Harriman. Eastern Harriman carries the highest population-weighted average; Northern Harriman carries the lowest. Just 0% of residents in Northern Harriman live in blocks above the EPA's 55 dBA threshold, a fifth of the share in Eastern Harriman.
Central Harriman
31.5 dBA · Quiet
Whisper
0% of people above 55 dBA
QuietLoud
Eastern Harriman
43.1 dBA · Quiet
Quiet suburban street at night
5% of people above 55 dBA
QuietLoud
Northern Harriman
23.2 dBA · Quiet
Whisper
0% of people above 55 dBA
QuietLoud
Southern Harriman
42.3 dBA · Quiet
Quiet suburban street at night
1% of people above 55 dBA
QuietLoud
Western Harriman
29.0 dBA · Quiet
Whisper
1% of people above 55 dBA
QuietLoud
Eastern Harriman sounds about 297% louder than Northern Harriman to the human ear, a 19.9 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 Unknown do you need to be?
Unknown 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 4% of Harriman sits under tree canopy (much lighter than most cities) and roughly 0% 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 Harriman. 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 Harriman
The bar chart below shows the share of Harriman residents in each noise band. About 78% 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 Harriman Compares
Harriman sits the highest among the peer group. Below: how Harriman's average outdoor noise and share of residents above the EPA threshold compare with Tie Siding, Jelm, Woods Landing, and Diamond.
Average noise level (dBA)
Harriman's 38.1 dBA pop-weighted average is the highest among the peer group. Wyoming as a whole averages 48.0 dBA and the U.S. averages 52.0 dBA. Both are lower than Harriman because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 2.5% of Harriman residents live in blocks where outdoor levels exceed the EPA's 55 dBA threshold. That's more than any of its peer group. Measured by land area instead, 1.5% of Harriman's footprint sits above 55 dBA, against a Wyoming average of 13.3% and a national average of 28.1%.
What This Means if You're Moving to Harriman
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 Unknown 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 4% of Harriman is under tree cover (much lighter than most cities), and the dominant land cover is grassland. 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.
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.
