Noise Levels in Lyon Street, Santa Ana, CA | Find Quiet Neighborhoods With Our Sound Map
59 dBA
Average noise across Lyon Street
Normal conversation an arm’s length away
3,555
Residents above the EPA 55 dBA threshold
54% of Lyon Street residents
86 dBA
Loudest residential point
Lawnmower at 1 m
This map shows modeled outdoor noise across Lyon Street 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 3,555 Lyon Street residents, or 53.7%, live above that level. By land area, 59.8% of Lyon Street is above 55 dBA.
Average noise levels for Lyon Street residents, grouped by direction from the center of Lyon Street. Southern Lyon Street carries the highest population-weighted average; Central Lyon Street carries the lowest. Just 28% of residents in Central Lyon Street live in blocks above the EPA's 55 dBA threshold, a third of the share in Southern Lyon Street.
Central Lyon Street
53.8 dBA · Moderate-loud
Quiet office to normal conversation
28% of people above 55 dBA
QuietLoud
Eastern Lyon Street
71.8 dBA · Loud
City bus interior
100% of people above 55 dBA
QuietLoud
Northern Lyon Street
61.8 dBA · Loud
Busy restaurant
84% of people above 55 dBA
QuietLoud
Southern Lyon Street
73.7 dBA · Loud
City bus interior
95% of people above 55 dBA
QuietLoud
Western Lyon Street
55.0 dBA · Moderate-loud
Quiet office to normal conversation
15% of people above 55 dBA
QuietLoud
Southern Lyon Street sounds about 297% louder than Central Lyon Street to the human ear, a 19.9 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 Santa Ana Fwy do you need to be?
Santa Ana Fwy produces an estimated 82 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
82 dBA
Food blender at arm’s length
165 ft
67 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
42 dBA
Quiet suburban street at night
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 6% of Lyon Street sits under tree canopy (lighter than most neighborhoods) and roughly 72% 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.
-->
Rail Noise
Active freight rail runs through parts of Lyon Street. 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
John Wayne/Orange County (SNA) sits south of Lyon Street. 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 55 dBA on the map's Overall layer. Blocks on the opposite side of Lyon Street, particularly to the north, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Lyon Street
The bar chart below shows the share of Lyon Street residents in each noise band. About 42% of residents live below the EPA's 55 dBA threshold, and roughly 32% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Lyon Street Compares
Lyon Street sits the highest among the peer group. Below: how Lyon Street's average outdoor noise and share of residents above the EPA threshold compare with Townsend-Raitt, Delhi, Flower Park, and Henninger Park.
Average noise level (dBA)
Lyon Street's 59.4 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 Lyon Street because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 53.7% of Lyon Street 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, 59.8% of Lyon Street'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 Lyon Street
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 Santa Ana 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 6% of Lyon Street 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. John Wayne/Orange County's approach paths concentrate aviation noise to the south. Neighborhoods to the north 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.
