Noise Levels in Boston Avenue-Mill Hill, Bridgeport, CT | Find Quiet Neighborhoods With Our Sound Map
55 dBA
Average noise across Boston Avenue-Mill Hill
Quiet office to normal conversation
3,981
Residents above the EPA 55 dBA threshold
46% of Boston Avenue-Mill Hill residents
98 dBA
Loudest residential point
Power saw
This map shows modeled outdoor noise across Boston Avenue-Mill Hill 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 3,981 Boston Avenue-Mill Hill residents, or 46.2%, live above that level. By land area, 49.2% of Boston Avenue-Mill Hill is above 55 dBA.
Average noise levels for Boston Avenue-Mill Hill residents, grouped by direction from the center of Boston Avenue-Mill Hill. Western Boston Avenue-Mill Hill carries the highest population-weighted average; Northern Boston Avenue-Mill Hill carries the lowest. Just 29% of residents in Northern Boston Avenue-Mill Hill live in blocks above the EPA's 55 dBA threshold, about half the share in Western Boston Avenue-Mill Hill.
Central Boston Avenue-Mill Hill
54.6 dBA · Moderate-loud
Quiet office to normal conversation
45% of people above 55 dBA
QuietLoud
Eastern Boston Avenue-Mill Hill
54.0 dBA · Moderate-loud
Quiet office to normal conversation
74% of people above 55 dBA
QuietLoud
Northern Boston Avenue-Mill Hill
52.7 dBA · Moderate
Quiet office to normal conversation
29% of people above 55 dBA
QuietLoud
Southern Boston Avenue-Mill Hill
58.1 dBA · Loud
Normal conversation an arm’s length away
65% of people above 55 dBA
QuietLoud
Western Boston Avenue-Mill Hill
58.2 dBA · Loud
Normal conversation an arm’s length away
76% of people above 55 dBA
QuietLoud
Western Boston Avenue-Mill Hill sounds about 46% louder than Northern Boston Avenue-Mill Hill to the human ear, a 5.5 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 98 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 busy restaurant.
At source
98 dBA
Power saw
165 ft
84 dBA
Food blender at arm’s length
330 ft
77 dBA
City bus interior
660 ft
69 dBA
Highway traffic 50 ft away
¼ mile
61 dBA
Busy restaurant
½ mile
54 dBA
Quiet office to normal conversation
Calculated from the model's calibrated attenuation formula. About 21% of Boston Avenue-Mill Hill sits under tree canopy (heavier than most neighborhoods) and roughly 60% 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 Boston Avenue-Mill Hill. 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 Boston Avenue-Mill Hill
The bar chart below shows the share of Boston Avenue-Mill Hill residents in each noise band. About 54% of residents live below the EPA's 55 dBA threshold, and roughly 6% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Boston Avenue-Mill Hill Compares
Boston Avenue-Mill Hill sits at the louder end of the spectrum. Below: how Boston Avenue-Mill Hill's average outdoor noise and share of residents above the EPA threshold compare with North Bridgeport, East Side-Bridgeport, Reservoir-Whiskey Hill, and Black Rock.
Average noise level (dBA)
Boston Avenue-Mill Hill's 54.9 dBA pop-weighted average is at the louder end of the spectrum. Connecticut as a whole averages 51.3 dBA and the U.S. averages 52.0 dBA. Both are lower than Boston Avenue-Mill Hill because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 46.2% of Boston Avenue-Mill Hill 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, 49.2% of Boston Avenue-Mill Hill's footprint sits above 55 dBA, against a Connecticut average of 27.3% and a national average of 28.1%.
What This Means if You're Moving to Boston Avenue-Mill Hill
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 21% of Boston Avenue-Mill Hill 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.
