Noise Levels in Westchester, Catonsville, MD | Find Quiet Neighborhoods With Our Sound Map

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 819 Westchester residents, or 24.1%, live above that level. By land area, 30.1% of Westchester is above 55 dBA.

See how noise in Westchester compares to similar-sized neighborhoods.

Noise by Part of Westchester

Average noise levels for Westchester residents, grouped by direction from the center of Westchester. The highest population-weighted average is in eastern Westchester; the lowest is in southwestern Westchester, where just 18% of residents live in blocks above the EPA's 55 dBA threshold, three-quarters of the share in the loudest section.

To the human ear, noise in eastern Westchester sounds about 33% louder than in southwestern Westchester, a 4.1 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.

Airport Noise

Baltimore/Washington International Thurgood Marshall (BWI) sits southeast of Westchester. 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 Westchester, particularly to the northwest, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.

How Noise Is Distributed Across Westchester

The bar chart below shows the share of Westchester residents in each noise band. About 85% of residents live below the EPA's 55 dBA threshold, and roughly 0% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.

How Westchester Compares

Westchester sits at the quieter end of the spectrum. Below: how Westchester's average outdoor noise and share of residents above the EPA threshold compare with Catonsville Heights, Edmondson Heights, St Denis, and Winsor Hills.

Average noise level (dBA)

Westchester's 52.2 dBA pop-weighted average is at the quieter end of the spectrum. Maryland as a whole averages 52.3 dBA and the U.S. averages 52.0 dBA. Both are lower than Westchester because most of either area is rural land away from major roads.

Share of residents above 55 dBA

About 24.1% of Westchester 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, 30.1% of Westchester'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 Westchester

• 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 41% of Westchester is under tree cover (much 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 southeast. Neighborhoods to the northwest of downtown show no measurable contribution from the airport.

Sources & Methodology