Noise Levels in Longwood-Winton Grove, Hayward, CA | Find Quiet Neighborhoods With Our Sound Map
62 dBA
Average noise across Longwood-Winton Grove
Busy restaurant
8,254
Residents above the EPA 55 dBA threshold
91% of Longwood-Winton Grove residents
80 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across Longwood-Winton Grove 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 8,254 Longwood-Winton Grove residents, or 90.9%, live above that level. By land area, 92.8% of Longwood-Winton Grove is above 55 dBA.
7.2% below 55 dBA
92.8% above 55 dBA
See how noise in Longwood-Winton Grove compares to similar-sized neighborhoods.
Noise by Part of Longwood-Winton Grove
Average noise levels for Longwood-Winton Grove residents, grouped by direction from the center of Longwood-Winton Grove. The highest population-weighted average is in southeastern Longwood-Winton Grove; the lowest is in southern Longwood-Winton Grove, where just 96% of residents live in blocks above the EPA's 55 dBA threshold, roughly the same as the share in the loudest section.
Southeastern Longwood-Winton Grove
65.4 dBA · Loud
Busy restaurant
Central Longwood-Winton Grove
62.7 dBA · Loud
Busy restaurant
Northern Longwood-Winton Grove
62.6 dBA · Loud
Busy restaurant
Northwestern Longwood-Winton Grove
62.6 dBA · Loud
Busy restaurant
Southern Longwood-Winton Grove
60.2 dBA · Loud
Normal conversation an arm’s length away
To the human ear, noise in southeastern Longwood-Winton Grove sounds about 43% louder than in southern Longwood-Winton Grove, a 5.2 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 Nimitz Fwy do you need to be?
Nimitz Fwy 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
59 dBA
Normal conversation an arm’s length away
660 ft
51 dBA
Quiet office
¼ mile
43 dBA
Quiet suburban street at night
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 4% of Longwood-Winton Grove sits under tree canopy (much lighter than most neighborhoods) and roughly 66% 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 Francisco Bay Oakland International (OAK) sits northwest of Longwood-Winton Grove. 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 60 dBA on the map's Overall layer. Blocks on the opposite side of Longwood-Winton Grove, particularly to the southeast, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Longwood-Winton Grove
The bar chart below shows the share of Longwood-Winton Grove residents in each noise band. About 0% of residents live below the EPA's 55 dBA threshold, and roughly 62% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Longwood-Winton Grove Compares
Longwood-Winton Grove sits at the louder end of the spectrum. Below: how Longwood-Winton Grove's average outdoor noise and share of residents above the EPA threshold compare with Burbank-Hayward, Hayward Highland, Santa Clara Street, and North Hayward.
Average noise level (dBA)
Longwood-Winton Grove's 61.7 dBA pop-weighted average is at the louder end of the spectrum. California as a whole averages 54.0 dBA and the U.S. averages 52.0 dBA. Both are lower than Longwood-Winton Grove because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 90.9% of Longwood-Winton Grove 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, 92.8% of Longwood-Winton Grove'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 Longwood-Winton Grove
- 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 Nimitz Fwy 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 4% of Longwood-Winton Grove 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 northwest. Neighborhoods to the southeast of downtown show no measurable contribution from the airport.
