This map shows modeled outdoor noise across 78633 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 2,662 78633 residents, or 12.7%, live above that level. By land area, 16.6% of 78633 is above 55 dBA.
See how noise in 78633 compares to similar-sized zip codes.
Noise by Part of 78633
Average noise levels for 78633 residents, grouped by direction from the center of 78633. Central 78633 carries the highest population-weighted average; Western 78633 carries the lowest. Just 4% of residents in Western 78633 live in blocks above the EPA's 55 dBA threshold, a fraction of the share in Central 78633.
Central 78633
0% of people above 55 dBA
Eastern 78633
16% of people above 55 dBA
Northern 78633
23% of people above 55 dBA
Southern 78633
15% of people above 55 dBA
Western 78633
4% of people above 55 dBA
Central 78633 sounds about 66% louder than Western 78633 to the human ear, a 7.3 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 I-35 do you need to be?
I-35 produces an estimated 79 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.
Calculated from the model's calibrated attenuation formula. About 10% of 78633 sits under tree canopy (lighter than most zip codes) and roughly 30% 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.