Noise Levels in Watertown Town, MA | Find Quiet Neighborhoods With Our Sound Map
56 dBA
Average noise across Watertown Town
Quiet office to normal conversation
15,915
Residents above the EPA 55 dBA threshold
53% of Watertown Town residents
70 dBA
Loudest residential point
Highway traffic 50 ft away
This map shows modeled outdoor noise across Watertown Town 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 15,915 Watertown Town residents, or 53.4%, live above that level. By land area, 57.0% of Watertown Town is above 55 dBA.
Average noise levels for Watertown Town residents, grouped by direction from the center of Watertown Town. Southern Watertown Town carries the highest population-weighted average; Northern Watertown Town carries the lowest. Just 48% of residents in Northern Watertown Town live in blocks above the EPA's 55 dBA threshold, three-quarters of the share in Southern Watertown Town.
Central Watertown Town
56.2 dBA · Moderate-loud
Normal conversation an arm’s length away
63% of people above 55 dBA
QuietLoud
Eastern Watertown Town
55.9 dBA · Moderate-loud
Quiet office to normal conversation
50% of people above 55 dBA
QuietLoud
Northern Watertown Town
54.5 dBA · Moderate-loud
Quiet office to normal conversation
48% of people above 55 dBA
QuietLoud
Southern Watertown Town
58.0 dBA · Loud
Normal conversation an arm’s length away
67% of people above 55 dBA
QuietLoud
Western Watertown Town
55.8 dBA · Moderate-loud
Quiet office to normal conversation
51% of people above 55 dBA
QuietLoud
Southern Watertown Town sounds about 27% louder than Northern Watertown Town to the human ear, a 3.5 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
56 dBA
Normal conversation an arm’s length away
330 ft
48 dBA
Quiet office
660 ft
40 dBA
Soft rainfall
¼ mile
35 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 25% of Watertown Town sits under tree canopy (about average for cities) and roughly 56% 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
General Edward Lawrence Logan International (BOS) sits east of Watertown Town. 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 75 dBA on the map's Overall layer. Blocks on the opposite side of Watertown Town, particularly to the west, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Watertown Town
The bar chart below shows the share of Watertown Town residents in each noise band. About 43% of residents live below the EPA's 55 dBA threshold, and roughly 16% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Watertown Town Compares
Watertown Town sits at the louder end of the spectrum. Below: how Watertown Town's average outdoor noise and share of residents above the EPA threshold compare with Needham, Lexington, Chelsea, and Hyde Park.
Average noise level (dBA)
Watertown Town's 56.0 dBA pop-weighted average is at the louder end of the spectrum. Massachusetts as a whole averages 54.3 dBA and the U.S. averages 52.0 dBA. Both are lower than Watertown Town because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 53.4% of Watertown Town 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, 57.0% of Watertown Town's footprint sits above 55 dBA, against a Massachusetts average of 40.0% and a national average of 28.1%.
What This Means if You're Moving to Watertown Town
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 Watertown Town 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. General Edward Lawrence Logan International's approach paths concentrate aviation noise to the east. Neighborhoods to the west 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.
