Noise Levels in Marion County, TX | Find Quiet Neighborhoods With Our Sound Map
45 dBA
Average noise across Marion County
Quiet suburban street at night
737
Residents above the EPA 55 dBA threshold
10% of Marion County residents
96 dBA
Loudest residential point
Power saw
This map shows modeled outdoor noise across Marion County 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 737 Marion County residents, or 10.2%, live above that level. By land area, 16.3% of Marion County is above 55 dBA.
Average noise levels for Marion County residents, grouped by direction from the center of Marion County. Northern Marion County carries the highest population-weighted average; Southern Marion County carries the lowest. Just 3% of residents in Southern Marion County live in blocks above the EPA's 55 dBA threshold, three-quarters of the share in Northern Marion County.
Central Marion County
46.0 dBA · Mostly quiet
Quiet suburban street at night
0% of people above 55 dBA
QuietLoud
Eastern Marion County
45.9 dBA · Mostly quiet
Quiet suburban street at night
16% of people above 55 dBA
QuietLoud
Northern Marion County
48.2 dBA · Mostly quiet
Quiet office
3% of people above 55 dBA
QuietLoud
Southern Marion County
42.6 dBA · Quiet
Quiet suburban street at night
3% of people above 55 dBA
QuietLoud
Western Marion County
44.2 dBA · Quiet
Quiet suburban street at night
6% of people above 55 dBA
QuietLoud
Northern Marion County sounds about 47% louder than Southern Marion County to the human ear, a 5.6 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 Cass County Rd do you need to be?
Cass County Rd produces an estimated 53 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
53 dBA
Quiet office to normal conversation
165 ft
40 dBA
Soft rainfall
330 ft
35 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 56% of Marion County sits under tree canopy (much heavier than most counties) and roughly 8% 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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Rail Noise
Active freight rail runs through parts of Marion County. 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.
How Noise Is Distributed Across Marion County
The bar chart below shows the share of Marion County residents in each noise band. About 85% of residents live below the EPA's 55 dBA threshold, and roughly 5% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.
How Marion County Compares
Marion County sits at the quieter end of the spectrum. Below: how Marion County's average outdoor noise and share of residents above the EPA threshold compare with Morris County, Camp County, Franklin County, and Cass County.
Average noise level (dBA)
Marion County's 45.1 dBA pop-weighted average is at the quieter end of the spectrum. Texas as a whole averages 50.8 dBA and the U.S. averages 52.0 dBA. Both are lower than Marion County because most of either area is rural land away from major roads.
Share of residents above 55 dBA
About 10.2% of Marion County 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, 16.3% of Marion County's footprint sits above 55 dBA, against a Texas average of 22.8% and a national average of 28.1%.
What This Means if You're Moving to Marion County
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 Cass County 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 56% of Marion County is under tree cover (much heavier than most counties), and the dominant land cover is evergreen forest. 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.
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.
