Noise by area in Los Angeles County

Modeled estimates for general information only — not measurements, not a guarantee, and not for legal, medical or real-estate decisions.

One page for each city and unincorporated community in Los Angeles County, and for each Neighborhood Council area in the City of Los Angeles. Each page gives the modeled road, rail and aircraft noise at the area’s building façades: the median and spread of the levels, the share of points at or above set levels, the main modeled source and the buildings with a less-exposed side.

The lists are alphabetical. The pages describe noise sources and modeled levels only; they do not rate or rank places.

Figures from the map data release of 14 October 2026, 14:09 UTC. The live map may show a different release.

Los Angeles County reference figures

Across 16,597,837 modeled building-façade points in Los Angeles County, the median 24-hour level is 56.1 dB CNEL; one point in ten is below 45.8 dB and one in ten above 68.0 dB. At night (10 pm–7 am) the median is 47.5 dB.

Modeled levels at building-façade points in Los Angeles County. The 24-hour CNEL includes aircraft; the Night level does not.
24-hour level (CNEL)
	Los Angeles County
Median	56.1 dB
1 point in 10 is below	45.8 dB
1 point in 10 is above	68.0 dB
Points at or above 55 dB	54.8%
Points at or above 60 dB	34.1%
Points at or above 65 dB	17.3%
Night (10 pm–7 am, LAeq)
Median	47.5 dB
1 point in 10 is below	37.5 dB
1 point in 10 is above	59.8 dB
Points at or above 45 dB	62.0%
Points at or above 50 dB	39.6%
Points at or above 55 dB	22.1%

At 96.1% of the building-façade points in Los Angeles County, road traffic is the largest modeled contribution to the 24-hour level; rail is the largest at 0.6% and aircraft at 3.3%.

Open the noise map

Cities

Unincorporated communities

Census designated places: unincorporated communities that the U.S. Census Bureau draws a boundary around. Unincorporated land outside them counts in the county figures only.

City of Los Angeles Neighborhood Council areas

The City of Los Angeles has its own page, and each of its 99 certified Neighborhood Council areas has one too. Council boundaries cover only part of the city and overlap in places.

Boundaries

Place and county boundaries: U.S. Census Bureau, TIGER/Line Shapefiles 2026. Census boundaries are drawn for statistics and are not legal land descriptions.

Neighborhood Council boundaries: City of Los Angeles, Bureau of Engineering (LA GeoHub, Neighborhood Councils (Certified)), CC BY 4.0.

About these figures

The points are building façades of all types, 4 m up and 2 m out from the walls of every kind of building, not only homes. Long walls and large buildings have more points, so the figures describe buildings, not people or households.

The model is uncalibrated. At a single spot it is typically about 6 dB off, higher or lower, and compared with measurements it reads about 3.6 to 4.4 dB high on average at measured sites where freeway noise dominates, with a wide spread. An area figure says nothing certain about any one building; look up an address on the map for its own modeled levels.

Partly modeled areas are described by their modeled part only. The figures come from building façades only, so open land does not affect them. On the map, land with no freeway or major road within 3 km has no computed value and shows the lowest color; that is an assumption, not a measurement.

Figures are road, rail and aircraft at building façades; the map’s background “city hum” layer is not included in these figures.

Not in the figures: helicopters (not mapped), sirens (an optional map layer, off by default), construction, events, nightlife, neighbors and sound indoors.