Noise Levels in South Natomas, Sacramento, CA | Find Quiet Neighborhoods With Our Sound Map

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 10,565 South Natomas residents, or 52.6%, live above that level. By land area, 53.9% of South Natomas is above 55 dBA.

See how noise in South Natomas compares to similar-sized neighborhoods.

Noise by Part of South Natomas

Average noise levels for South Natomas residents, grouped by direction from the center of South Natomas. The highest population-weighted average is in northern South Natomas; the lowest is in eastern South Natomas, where just 30% of residents live in blocks above the EPA's 55 dBA threshold, about half the share in the loudest section.

To the human ear, noise in northern South Natomas sounds about 195% louder than in eastern South Natomas, a 15.6 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.

Rail Noise

Active freight rail runs through parts of South Natomas. 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

Sacramento International (SMF) sits northwest of South Natomas. 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 45 dBA on the map's Overall layer. Blocks on the opposite side of South Natomas, particularly to the southeast, show no measurable aviation contribution. Use the Aviation toggle on the map above to isolate the airport's footprint.

How Noise Is Distributed Across South Natomas

The bar chart below shows the share of South Natomas residents in each noise band. About 34% of residents live below the EPA's 55 dBA threshold, and roughly 32% live in blocks above 60 dBA. Long-term exposure in that range is linked to elevated stress hormones and cardiovascular risk.

How South Natomas Compares

South Natomas sits at the quieter end of the spectrum. Below: how South Natomas's average outdoor noise and share of residents above the EPA threshold compare with East Sacramento, Pocket, Meadowview, and South Land Park.

Average noise level (dBA)

South Natomas's 57.5 dBA pop-weighted average is at the quieter end of the spectrum. California as a whole averages 54.0 dBA and the U.S. averages 52.0 dBA. Both are lower than South Natomas because most of either area is rural land away from major roads.

Share of residents above 55 dBA

About 52.6% of South Natomas 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, 53.9% of South Natomas's footprint sits above 55 dBA, against a California average of 36.0% and a national average of 28.1%.

What This Means if You're Moving to South Natomas

• 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 I-80 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 11% of South Natomas is under tree cover (about average for neighborhoods), and the dominant land cover is medium-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. Sacramento International's approach paths concentrate aviation noise to the northwest. Neighborhoods to the southeast of downtown show no measurable contribution from the airport.

Sources & Methodology