Noise Levels in Green Park, MO | Find Quiet Neighborhoods With Our Sound Map
66 dBA
Average noise across Green Park
Highway traffic 50 ft away
1,845
Residents above the EPA 55 dBA threshold
53% of Green Park residents
102 dBA
Loudest residential point
Power saw
This map shows modeled outdoor noise across Green Park 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 1,845 Green Park residents, or 52.8%, live above that level. By land area, 58.5% of Green Park is above 55 dBA.
Average noise levels for Green Park residents, grouped by direction from the center of Green Park. Southern Green Park carries the highest population-weighted average; Central Green Park carries the lowest. Just 53% of residents in Central Green Park live in blocks above the EPA's 55 dBA threshold, three-quarters of the share in Southern Green Park.
Central Green Park
57.2 dBA · Moderate-loud
Normal conversation an arm’s length away
53% of people above 55 dBA
QuietLoud
Eastern Green Park
71.4 dBA · Loud
City bus interior
74% of people above 55 dBA
QuietLoud
Northern Green Park
65.1 dBA · Loud
Busy restaurant
33% of people above 55 dBA
QuietLoud
Southern Green Park
79.5 dBA · Loud
City bus interior
68% of people above 55 dBA
QuietLoud
Western Green Park
59.0 dBA · Loud
Normal conversation an arm’s length away
45% of people above 55 dBA
QuietLoud
Southern Green Park sounds about 369% louder than Central Green Park to the human ear, a 22.3 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 Green Park Rd do you need to be?
Green Park Rd produces an estimated 60 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
60 dBA
Normal conversation an arm’s length away
165 ft
45 dBA
Quiet suburban street at night
330 ft
36 dBA
Soft rainfall
660 ft
35 dBA
Soft rainfall
¼ mile
35 dBA
Soft rainfall
½ mile
35 dBA
Soft rainfall
Calculated from the model's calibrated attenuation formula. About 30% of Green Park sits under tree canopy (about average for cities) and roughly 40% 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 Green Park. 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
St Louis Lambert International (STL) sits north of Green Park. 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 65 dBA on the map's Overall layer. Blocks on the opposite side of Green Park, particularly to the south, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.
How Noise Is Distributed Across Green Park
The bar chart below shows the share of Green Park residents in each noise band. About 2% of residents live below the EPA's 55 dBA threshold, and roughly 56% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Green Park Compares
Green Park sits the highest among the peer group. Below: how Green Park's average outdoor noise and share of residents above the EPA threshold compare with Frontenac, Northwoods, Normandy, and Rock Hill.
Average noise level (dBA)
Green Park's 66.5 dBA pop-weighted average is the highest among the peer group. Missouri as a whole averages 53.9 dBA and the U.S. averages 52.0 dBA. Both are lower than Green Park because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 52.8% of Green Park 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, 58.5% of Green Park's footprint sits above 55 dBA, against a Missouri average of 32.5% and a national average of 28.1%.
What This Means if You're Moving to Green Park
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 Green Park Rd 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 30% of Green Park is under tree cover (about average for cities), and the dominant land cover is low-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. St Louis Lambert International's approach paths concentrate aviation noise to the north. Neighborhoods to the south 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.
