This map shows modeled outdoor noise across 77318 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 1,507 77318 residents, or 10.6%, live above that level. By land area, 15.8% of 77318 is above 55 dBA.
See how noise in 77318 compares to similar-sized zip codes.
Noise by Part of 77318
Average noise levels for 77318 residents, grouped by direction from the center of 77318. Eastern 77318 carries the highest population-weighted average; Western 77318 carries the lowest. Just 4% of residents in Western 77318 live in blocks above the EPA's 55 dBA threshold, a third of the share in Eastern 77318.
Eastern 77318
14% of people above 55 dBA
Northern 77318
12% of people above 55 dBA
Southern 77318
10% of people above 55 dBA
Western 77318
4% of people above 55 dBA
Eastern 77318 sounds about 67% louder than Western 77318 to the human ear, a 7.4 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-45 do you need to be?
I-45 produces an estimated 77 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 40% of 77318 sits under tree canopy (heavier than most zip codes) and roughly 18% 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.