Noise Levels in Rancho San Joaquin, Irvine, CA | Find Quiet Neighborhoods With Our Sound Map
62 dBA
Average noise across Rancho San Joaquin
Busy restaurant
2,420
Residents above the EPA 55 dBA threshold
63% of Rancho San Joaquin residents
71 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across Rancho San Joaquin 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 2,420 Rancho San Joaquin residents, or 63.2%, live above that level. By land area, 55.7% of Rancho San Joaquin is above 55 dBA.
Average noise levels for Rancho San Joaquin residents, grouped by direction from the center of Rancho San Joaquin. Northern Rancho San Joaquin carries the highest population-weighted average; Central Rancho San Joaquin carries the lowest. Just 59% of residents in Central Rancho San Joaquin live in blocks above the EPA's 55 dBA threshold, about two-thirds of the share in Northern Rancho San Joaquin.
Central Rancho San Joaquin
60.8 dBA · Loud
Normal conversation an arm’s length away
59% of people above 55 dBA
QuietLoud
Northern Rancho San Joaquin
62.9 dBA · Loud
Busy restaurant
100% of people above 55 dBA
QuietLoud
Southern Rancho San Joaquin
61.7 dBA · Loud
Busy restaurant
33% of people above 55 dBA
QuietLoud
Northern Rancho San Joaquin sounds about 16% louder than Central Rancho San Joaquin to the human ear, a 2.1 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.
How far back from do you need to be?
produces an estimated 71 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
71 dBA
City bus interior
165 ft
57 dBA
Normal conversation an arm’s length away
330 ft
49 dBA
Quiet office
660 ft
41 dBA
Soft rainfall
¼ mile
35 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 8% of Rancho San Joaquin sits under tree canopy (lighter than most neighborhoods) and roughly 26% 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
John Wayne/Orange County (SNA) sits west of Rancho San Joaquin. 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 45 dBA on the map's Overall layer. Blocks on the opposite side of Rancho San Joaquin, 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 Rancho San Joaquin
The bar chart below shows the share of Rancho San Joaquin residents in each noise band. About 0% of residents live below the EPA's 55 dBA threshold, and roughly 60% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Rancho San Joaquin Compares
Rancho San Joaquin sits the highest among the peer group. Below: how Rancho San Joaquin's average outdoor noise and share of residents above the EPA threshold compare with Sunwood Central, Turtle Ridge, Cornerstone Village, and Floral Park.
Average noise level (dBA)
Rancho San Joaquin's 61.5 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 Rancho San Joaquin because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 63.2% of Rancho San Joaquin 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, 55.7% of Rancho San Joaquin'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 Rancho San Joaquin
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 8% of Rancho San Joaquin is under tree cover (lighter than most neighborhoods), and the dominant land cover is low-density developed open space. 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 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.
