Noise Levels in Bay Terraces, San Diego, CA | Find Quiet Neighborhoods With Our Sound Map
55 dBA
Average noise across Bay Terraces
Quiet office to normal conversation
6,594
Residents above the EPA 55 dBA threshold
33% of Bay Terraces residents
78 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across Bay Terraces 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 6,594 Bay Terraces residents, or 33.0%, live above that level. By land area, 37.3% of Bay Terraces is above 55 dBA.
Average noise levels for Bay Terraces residents, grouped by direction from the center of Bay Terraces. Southern Bay Terraces carries the highest population-weighted average; Western Bay Terraces carries the lowest. Just 27% of residents in Western Bay Terraces live in blocks above the EPA's 55 dBA threshold, about two-thirds of the share in Southern Bay Terraces.
Central Bay Terraces
53.6 dBA · Moderate-loud
Quiet office to normal conversation
30% of people above 55 dBA
QuietLoud
Eastern Bay Terraces
56.4 dBA · Moderate-loud
Normal conversation an arm’s length away
28% of people above 55 dBA
QuietLoud
Northern Bay Terraces
53.6 dBA · Moderate-loud
Quiet office to normal conversation
35% of people above 55 dBA
QuietLoud
Southern Bay Terraces
56.6 dBA · Moderate-loud
Normal conversation an arm’s length away
43% of people above 55 dBA
QuietLoud
Western Bay Terraces
52.9 dBA · Moderate
Quiet office to normal conversation
27% of people above 55 dBA
QuietLoud
Southern Bay Terraces sounds about 29% louder than Western Bay Terraces to the human ear, a 3.7 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 S Bay Pkwy do you need to be?
S Bay Pkwy produces an estimated 77 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
77 dBA
City bus interior
165 ft
62 dBA
Busy restaurant
330 ft
54 dBA
Quiet office to normal conversation
660 ft
45 dBA
Quiet suburban street at night
¼ mile
37 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 5% of Bay Terraces sits under tree canopy (lighter than most neighborhoods) 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
San Diego International (SAN) sits west of Bay Terraces. 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 50 dBA on the map's Overall layer. Blocks on the opposite side of Bay Terraces, particularly to the east, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Bay Terraces
The bar chart below shows the share of Bay Terraces residents in each noise band. About 68% of residents live below the EPA's 55 dBA threshold, and roughly 10% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Bay Terraces Compares
Bay Terraces sits at the quieter end of the spectrum. Below: how Bay Terraces's average outdoor noise and share of residents above the EPA threshold compare with Paradise Hills, North Park San Diego, College Area, and City Heights West.
Average noise level (dBA)
Bay Terraces's 54.7 dBA pop-weighted average is at the quieter end of the spectrum. California as a whole averages 54.0 dBA and the U.S. averages 52.0 dBA. Both are lower than Bay Terraces because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 33.0% of Bay Terraces 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, 37.3% of Bay Terraces's footprint sits above 55 dBA, against a California average of 36.0% and a national average of 28.1%.
What This Means if You're Moving to Bay Terraces
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 S Bay Pkwy 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 5% of Bay Terraces is under tree cover (lighter 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.
Airport noise is directional. San Diego International's approach paths concentrate aviation noise to the west. Neighborhoods to the east 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.
