Noise Levels in Floresta Gardens-Bradrick, San Leandro, CA | Find Quiet Neighborhoods With Our Sound Map
63 dBA
Average noise across Floresta Gardens-Bradrick
Busy restaurant
5,601
Residents above the EPA 55 dBA threshold
85% of Floresta Gardens-Bradrick residents
87 dBA
Loudest residential point
Lawnmower at 1 m
This map shows modeled outdoor noise across Floresta Gardens-Bradrick 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 5,601 Floresta Gardens-Bradrick residents, or 84.8%, live above that level. By land area, 76.7% of Floresta Gardens-Bradrick is above 55 dBA.
Average noise levels for Floresta Gardens-Bradrick residents, grouped by direction from the center of Floresta Gardens-Bradrick. Southern Floresta Gardens-Bradrick carries the highest population-weighted average; Northern Floresta Gardens-Bradrick carries the lowest. Just 61% of residents in Northern Floresta Gardens-Bradrick live in blocks above the EPA's 55 dBA threshold, about two-thirds of the share in Southern Floresta Gardens-Bradrick.
Central Floresta Gardens-Bradrick
61.7 dBA · Loud
Busy restaurant
85% of people above 55 dBA
QuietLoud
Eastern Floresta Gardens-Bradrick
64.1 dBA · Loud
Busy restaurant
100% of people above 55 dBA
QuietLoud
Northern Floresta Gardens-Bradrick
56.9 dBA · Moderate-loud
Normal conversation an arm’s length away
61% of people above 55 dBA
QuietLoud
Southern Floresta Gardens-Bradrick
68.6 dBA · Loud
Highway traffic 50 ft away
100% of people above 55 dBA
QuietLoud
Western Floresta Gardens-Bradrick
62.7 dBA · Loud
Busy restaurant
65% of people above 55 dBA
QuietLoud
Southern Floresta Gardens-Bradrick sounds about 125% louder than Northern Floresta Gardens-Bradrick to the human ear, a 11.7 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 I-880 do you need to be?
I-880 produces an estimated 80 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 quiet suburban street at night.
At source
80 dBA
City bus interior
165 ft
66 dBA
Highway traffic 50 ft away
330 ft
58 dBA
Normal conversation an arm’s length away
660 ft
50 dBA
Quiet office
¼ mile
42 dBA
Quiet suburban street at night
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 3% of Floresta Gardens-Bradrick sits under tree canopy (much lighter than most neighborhoods) and roughly 62% 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 Floresta Gardens-Bradrick. 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
San Francisco Bay Oakland International (OAK) sits west of Floresta Gardens-Bradrick. The U.S. Department of Transportation models aviation noise around this airport from federal traffic data, 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 Floresta Gardens-Bradrick, 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 Floresta Gardens-Bradrick
The bar chart below shows the share of Floresta Gardens-Bradrick residents in each noise band. About 5% of residents live below the EPA's 55 dBA threshold, and roughly 68% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Floresta Gardens-Bradrick Compares
Floresta Gardens-Bradrick sits the highest among the peer group. Below: how Floresta Gardens-Bradrick's average outdoor noise and share of residents above the EPA threshold compare with Lower Bal, Southgate, Old San Leandro, and Davis Tract.
Average noise level (dBA)
Floresta Gardens-Bradrick's 63.4 dBA pop-weighted average is the highest among the peer group. California as a whole averages 54.0 dBA and the U.S. averages 52.0 dBA. Both are lower than Floresta Gardens-Bradrick because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 84.8% of Floresta Gardens-Bradrick residents live in blocks where outdoor levels exceed the EPA's 55 dBA threshold. That's more than any of its peer group. Measured by land area instead, 76.7% of Floresta Gardens-Bradrick'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 Floresta Gardens-Bradrick
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 I-880 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 3% of Floresta Gardens-Bradrick is under tree cover (much 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 Francisco Bay Oakland 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.
