Noise Levels in Merion Station, PA | Find Quiet Neighborhoods With Our Sound Map
58 dBA
Average noise across Merion Station
Normal conversation an arm’s length away
3,721
Residents above the EPA 55 dBA threshold
63% of Merion Station residents
80 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across Merion Station 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 3,721 Merion Station residents, or 62.7%, live above that level. By land area, 63.6% of Merion Station is above 55 dBA.
Average noise levels for Merion Station residents, grouped by direction from the center of Merion Station. Southern Merion Station carries the highest population-weighted average; Eastern Merion Station carries the lowest. Just 57% of residents in Eastern Merion Station live in blocks above the EPA's 55 dBA threshold, roughly the same as the share in Southern Merion Station.
Central Merion Station
58.2 dBA · Loud
Normal conversation an arm’s length away
61% of people above 55 dBA
QuietLoud
Eastern Merion Station
56.2 dBA · Moderate-loud
Normal conversation an arm’s length away
57% of people above 55 dBA
QuietLoud
Northern Merion Station
57.1 dBA · Moderate-loud
Normal conversation an arm’s length away
60% of people above 55 dBA
QuietLoud
Southern Merion Station
59.5 dBA · Loud
Normal conversation an arm’s length away
59% of people above 55 dBA
QuietLoud
Western Merion Station
57.9 dBA · Moderate-loud
Normal conversation an arm’s length away
76% of people above 55 dBA
QuietLoud
Southern Merion Station sounds about 26% louder than Eastern Merion Station to the human ear, a 3.3 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 City Av do you need to be?
City Av produces an estimated 66 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
66 dBA
Busy restaurant
165 ft
52 dBA
Quiet office to normal conversation
330 ft
45 dBA
Quiet suburban street at night
660 ft
37 dBA
Soft rainfall
¼ mile
35 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 42% of Merion Station sits under tree canopy (heavier than most cities) and roughly 35% 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 Merion Station. 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.
Airport Noise
Philadelphia International (PHL) sits south of Merion Station. 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 Merion Station, particularly to the north, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Merion Station
The bar chart below shows the share of Merion Station residents in each noise band. About 21% of residents live below the EPA's 55 dBA threshold, and roughly 27% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Merion Station Compares
Merion Station sits at the quieter end of the spectrum. Below: how Merion Station's average outdoor noise and share of residents above the EPA threshold compare with Morton, Narberth, Folsom, and Folcroft.
Average noise level (dBA)
Merion Station's 57.9 dBA pop-weighted average is at the quieter end of the spectrum. Pennsylvania as a whole averages 52.9 dBA and the U.S. averages 52.0 dBA. Both are lower than Merion Station because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 62.7% of Merion Station 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, 63.6% of Merion Station's footprint sits above 55 dBA, against a Pennsylvania average of 33.5% and a national average of 28.1%.
What This Means if You're Moving to Merion Station
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 City Av 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 42% of Merion Station is under tree cover (heavier than most cities), and the dominant land cover is low-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. Philadelphia International's approach paths concentrate aviation noise to the south. Neighborhoods to the north 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.
