Noise Levels in Nashua Historic District, Nashua, NH | Find Quiet Neighborhoods With Our Sound Map
57 dBA
Average noise across Nashua Historic District
Normal conversation an arm’s length away
2,159
Residents above the EPA 55 dBA threshold
60% of Nashua Historic District residents
79 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across Nashua Historic District 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 2,159 Nashua Historic District residents, or 59.9%, live above that level. By land area, 56.5% of Nashua Historic District is above 55 dBA.
Average noise levels for Nashua Historic District residents, grouped by direction from the center of Nashua Historic District. Southern Nashua Historic District carries the highest population-weighted average; Northern Nashua Historic District carries the lowest. Just 12% of residents in Northern Nashua Historic District live in blocks above the EPA's 55 dBA threshold, a fifth of the share in Southern Nashua Historic District.
Central Nashua Historic District
58.2 dBA · Loud
Normal conversation an arm’s length away
73% of people above 55 dBA
QuietLoud
Eastern Nashua Historic District
53.8 dBA · Moderate-loud
Quiet office to normal conversation
0% of people above 55 dBA
QuietLoud
Northern Nashua Historic District
50.7 dBA · Moderate
Quiet office
12% of people above 55 dBA
QuietLoud
Southern Nashua Historic District
65.6 dBA · Loud
Busy restaurant
91% of people above 55 dBA
QuietLoud
Western Nashua Historic District
56.8 dBA · Moderate-loud
Normal conversation an arm’s length away
65% of people above 55 dBA
QuietLoud
Southern Nashua Historic District sounds about 181% louder than Northern Nashua Historic District to the human ear, a 14.9 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 do you need to be?
produces an estimated 79 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
79 dBA
City bus interior
165 ft
64 dBA
Busy restaurant
330 ft
56 dBA
Normal conversation an arm’s length away
660 ft
48 dBA
Quiet office
¼ mile
40 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 30% of Nashua Historic District sits under tree canopy (heavier than most neighborhoods) and roughly 49% 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 Nashua Historic District. 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 Nashua Historic District
The bar chart below shows the share of Nashua Historic District residents in each noise band. About 32% of residents live below the EPA's 55 dBA threshold, and roughly 23% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Nashua Historic District Compares
Nashua Historic District sits at the quieter end of the spectrum. Below: how Nashua Historic District's average outdoor noise and share of residents above the EPA threshold compare with North End, Mine Falls Park, Downtown Nashua, and crown-hill-nashua-nh.
Average noise level (dBA)
Nashua Historic District's 57.3 dBA pop-weighted average is at the quieter end of the spectrum. New Hampshire as a whole averages 48.7 dBA and the U.S. averages 52.0 dBA. Both are lower than Nashua Historic District because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 59.9% of Nashua Historic District 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, 56.5% of Nashua Historic District's footprint sits above 55 dBA, against a New Hampshire average of 18.7% and a national average of 28.1%.
What This Means if You're Moving to Nashua Historic District
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 30% of Nashua Historic District is under tree cover (heavier than most neighborhoods), 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.
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.
