Noise Levels in Glenham-Belhar, Baltimore, MD | Find Quiet Neighborhoods With Our Sound Map
54 dBA
Average noise across Glenham-Belhar
Quiet office to normal conversation
2,042
Residents above the EPA 55 dBA threshold
38% of Glenham-Belhar residents
68 dBA
Loudest residential point
Highway traffic 50 ft away
This map shows modeled outdoor noise across Glenham-Belhar 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.
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 2,042 Glenham-Belhar residents, or 38.2%, live above that level. By land area, 42.2% of Glenham-Belhar is above 55 dBA.
57.8% below 55 dBA
42.2% above 55 dBA
See how noise in Glenham-Belhar compares to similar-sized neighborhoods.
Noise by Part of Glenham-Belhar
Average noise levels for Glenham-Belhar residents, grouped by direction from the center of Glenham-Belhar. The highest population-weighted average is in eastern Glenham-Belhar; the lowest is in northwestern Glenham-Belhar, where just 26% of residents live in blocks above the EPA's 55 dBA threshold, about two-thirds of the share in the loudest section.
Eastern Glenham-Belhar
57.4 dBA · Moderate-loud
Normal conversation an arm’s length away
Northeastern Glenham-Belhar
57.4 dBA · Moderate-loud
Normal conversation an arm’s length away
Central Glenham-Belhar
54.4 dBA · Moderate-loud
Quiet office to normal conversation
Western Glenham-Belhar
53.5 dBA · Moderate-loud
Quiet office to normal conversation
Northwestern Glenham-Belhar
52.6 dBA · Moderate
Quiet office to normal conversation
To the human ear, noise in eastern Glenham-Belhar sounds about 39% louder than in northwestern Glenham-Belhar, a 4.8 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 68 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
68 dBA
Highway traffic 50 ft away
165 ft
53 dBA
Quiet office to normal conversation
330 ft
44 dBA
Quiet suburban street at night
660 ft
36 dBA
Soft rainfall
¼ mile
35 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 24% of Glenham-Belhar sits under tree canopy (heavier than most neighborhoods) and roughly 38% 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
Baltimore/Washington International Thurgood Marshall (BWI) sits southwest of Glenham-Belhar. 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 Glenham-Belhar, particularly to the northeast, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Glenham-Belhar
The bar chart below shows the share of Glenham-Belhar residents in each noise band. About 68% 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 Glenham-Belhar Compares
Glenham-Belhar sits the lowest among the peer group. Below: how Glenham-Belhar's average outdoor noise and share of residents above the EPA threshold compare with Waltherson, Patterson Park, Hopkins-Middle East, and Bayview Area.
Average noise level (dBA)
Glenham-Belhar's 53.9 dBA pop-weighted average is the lowest among the peer group. Maryland as a whole averages 52.3 dBA and the U.S. averages 52.0 dBA. Both are lower than Glenham-Belhar because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 38.2% of Glenham-Belhar residents live in blocks where outdoor levels exceed the EPA's 55 dBA threshold. That's fewer than any of its peer group. Measured by land area instead, 42.2% of Glenham-Belhar's footprint sits above 55 dBA, against a Maryland average of 32.9% and a national average of 28.1%.
What This Means if You're Moving to Glenham-Belhar
- 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 24% of Glenham-Belhar is under tree cover (heavier than most neighborhoods), 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. Baltimore/Washington International Thurgood Marshall's approach paths concentrate aviation noise to the southwest. Neighborhoods to the northeast of downtown show no measurable contribution from the airport.
