Noise Levels in St. Just, PR | Find Quiet Neighborhoods With Our Sound Map
52 dBA
Average noise across St. Just
Quiet office to normal conversation
1,089
Residents above the EPA 55 dBA threshold
19% of St. Just residents
74 dBA
Loudest residential point
City bus interior
This map shows modeled outdoor noise across St. Just 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 1,089 St. Just residents, or 18.6%, live above that level. By land area, 18.3% of St. Just is above 55 dBA.
81.7% below 55 dBA
18.3% above 55 dBA
See how noise in St. Just compares to similar-sized cities.
Noise by Part of St. Just
Average noise levels for St. Just residents, grouped by direction from the center of St. Just. Eastern St. Just carries the highest population-weighted average; Central St. Just carries the lowest. Just 0% of residents in Central St. Just live in blocks above the EPA's 55 dBA threshold, a fifth of the share in Eastern St. Just.
Central St. Just
43.6 dBA · Quiet
Quiet suburban street at night
Eastern St. Just
52.7 dBA · Moderate
Quiet office to normal conversation
Southern St. Just
50.1 dBA · Moderate
Quiet office
Western St. Just
51.7 dBA · Moderate
Quiet office to normal conversation
Eastern St. Just sounds about 88% louder than Central St. Just to the human ear, a 9.1 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 Pr-844 do you need to be?
Pr-844 produces an estimated 61 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
61 dBA
Normal conversation an arm’s length away
165 ft
48 dBA
Quiet office
330 ft
40 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 0% of St. Just sits under tree canopy (about average for cities) and roughly 0% 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
Luis Munoz Marin International (SJU) sits north of St. Just. 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 St. Just, 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 St. Just
The bar chart below shows the share of St. Just residents in each noise band. About 95% of residents live below the EPA's 55 dBA threshold, and roughly 0% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How St. Just Compares
St. Just sits at the quieter end of the spectrum. Below: how St. Just's average outdoor noise and share of residents above the EPA threshold compare with Loiza, La Cumbre, Hacienda San Jose, and Bayamon Gardens.
Average noise level (dBA)
St. Just's 51.5 dBA pop-weighted average is at the quieter end of the spectrum. Puerto Rico as a whole averages 52.9 dBA and the U.S. averages 52.0 dBA. Both are lower than St. Just because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 18.6% of St. Just residents live in blocks where outdoor levels exceed the EPA's 55 dBA threshold. That's fewer than any of its peer group. Measured by land area instead, 18.3% of St. Just's footprint sits above 55 dBA, against a Puerto Rico average of 36.1% and a national average of 28.1%.
What This Means if You're Moving to St. Just
- 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 Pr-844 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 0% of St. Just is under tree cover (about average for cities), and the dominant land cover is . 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. Luis Munoz Marin International's approach paths concentrate aviation noise to the north. Neighborhoods to the south of downtown show no measurable contribution from the airport.
