Los Angeles air quality now

United States · The summary is refreshed every 15 minutes.

October 22

The air is clean now

Los Angeles

19°C

Cloudy

2AQI

1015hPa

Atmospheric
pressure

73%

Humidity

Los Angeles, October 21, 2026: daily mean PM2.5 3 µg/m³ (12 sensors), level “Low” — as in the Atmy Data Hub. Now (11:00 local time): 0.4 µg/m³. Open methodology and data in JSON: Methodology and data sources · JSON

Right now in Los Angeles, PM2.5 averages 0.4 µg/m³ — “good” on the US EPA scale (approximate, from hourly readings). Mean of 12 sensors on the Atmy network, readings from 10:46–10:47 local time (17:46–17:47 UTC), summary prepared at 11:00 local time. Median: 0.0 µg/m³; range across sensors: 0.0–1.7 µg/m³.

In Los Angeles the air is good right now (approximate, US EPA scale). From 22:00 to 11:00 local time the city mean PM2.5 fell from 4.2 to 0.4 µg/m³.

The weather data do not point to a clear reason for this level.

Weather now: cloudy, 19°C, wind 2 m/s, humidity 73%. By 13:00 the wind is expected to pick up to 4 m/s, which may clear the air.

Written automatically at 11:00 local time (18:00 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.

7 km/h

Wind, ESE

0 mm

Precipitation today

Los Angeles: air quality for the completed day

Metric: PM2.5, µg/m³ · Color scale: EPA AQI · October 21, 2026 · 00:00–24:00 UTC

3 µg/m³ Low

Daily mean PM2.5 on October 21, 2026 (00:00–24:00 UTC): 3 µg/m³ from 12 sensors that passed the quality check — the same value as in the Atmy Data Hub.

LowModerateElevatedHighVery highExtremely high

Air Quality in United States for the Completed Day

Metric: PM2.5, µg/m³ · Color scale: EPA AQI · October 21, 2026 · 00:00–24:00 UTC

Portland →9 µg/m³Bellevue →9 µg/m³
LowModerateElevatedHighVery highExtremely high

Source: Air monitoring system atmy.ai

Los Angeles: PM2.5 by month

Metric: PM2.5, µg/m³ · Color scale: EPA AQI

Mean
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
This month
11
12
18
19
8
7
16
4
12
11
10
10
8
6

Monthly means of quality-checked sensors, as in the Data Hub trend; the current month is still incomplete, “-” means no data.

Pollution accumulation index now

27%An estimate of weather conditions · not a PM2.5 forecast

Now2737
11.0019.0002.0010.00

Pollution accumulation forecast

Today — October 22

22°/16°

Index by time of day

53/100Moderate

  1. 53/100Night
  2. 38/100Morning
  3. 6/100Day
  4. 28/100Evening

Friday — October 23

22°/14°

Index by time of day

56/100Moderate

  1. 56/100Night
  2. 44/100Morning
  3. 9/100Day
  4. 26/100Evening

Saturday — October 24

25°/14°

Index by time of day

59/100Moderate

  1. 59/100Night
  2. 39/100Morning
  3. 7/100Day
  4. 21/100Evening

Sunday — October 25

28°/20°

Index by time of day

55/100Moderate

  1. 55/100Night
  2. 43/100Morning
  3. 7/100Day
  4. 21/100Evening

Monday — October 26

30°/22°

Index by time of day

54/100Moderate

  1. 54/100Night
  2. 42/100Morning
  3. 8/100Day
  4. 24/100Evening

Tuesday — October 27

28°/22°

Index by time of day

50/100Moderate

  1. 50/100Night
  2. 37/100Morning
  3. 6/100Day
  4. 20/100Evening

Forecast of conditions that trap pollution near the surface

Weather

19°

Cloudy. Feels like 19°C

  1. MorningCloudy19°C73%
  2. DayClear22°C47%
  3. EveningPartly cloudy16°C80%

Wind

7km/hWind from the ESE

11km/hWind gusts

Wind force: 2

Gusts up to 23 km/h are expected.

10-day weather forecast for Los Angeles

United States

  1. TodayOct 22Cloudy22°C16°C
  2. FriOct 23Cloudy22°C14°C
  3. SatOct 24Clear25°C14°C
  4. SunOct 25Cloudy28°C20°C
  5. MonOct 26Partly cloudy30°C22°C
  6. TueOct 27Cloudy28°C22°C
  7. WedOct 28Cloudy27°C21°C
  8. ThuOct 29Cloudy25°C20°C
  9. FriOct 30Cloudy24°C19°C
  10. SatOct 31Cloudy22°C19°C

Where in Los Angeles is the air worse?

See all sensors

Highest current reading: 1.7 µg/m³ (North Hollywood). Lowest: 0.0 µg/m³ (Elysian Heights (Preston Ave)). The list shows every sensor, highest first.

  1. North Hollywood →2 µg/m³
  2. Marco Triangle Park, Venice, California →2 µg/m³
  3. Cielo Way →1 µg/m³
  4. West Los Angeles →1 µg/m³
  5. PicWood_Malcolm_Ave_01 →0 µg/m³
  6. Cleland →0 µg/m³
  7. Los Angeles - Mid City →0 µg/m³
  8. Selma →0 µg/m³
  9. Santa Monica Canyon →0 µg/m³
  10. LA →0 µg/m³
+2 more sensors
  1. LA State Historic Park →0 µg/m³
  2. Elysian Heights (Preston Ave) →0 µg/m³

Source: atmy.ai monitoring network

Who provides the data

Sensors in the summary by network: AirGradient — 12 sensors.

Atmy shows the networks’ readings after the Data Hub’s quality check: test devices and sensors that fail it are left out.

United States: sensors in total

41

  1. BellevueUnited States

    4

  2. PortlandUnited States

    4

  3. RenoUnited States

    3

Cities with the most sensors

All sensors on the map, by city as the map assigns them; the city’s values count only the sensors that pass the Data Hub’s quality check.

Air quality calendar: Los Angeles

Daily mean PM2.5 of the city sensors, µg/m³

Click a day to see its date and value.

LowModerateElevatedHighVery highExtremely high

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A card with the current PM2.5 in Los Angeles: it is refreshed every 15 minutes and links to this page. Paste the code into your site.

Air quality in Los Angeles now — Atmy

United States · City ranking · All pilot cities

Questions

What was the air quality in Los Angeles over the last completed day?

Daily mean PM2.5 on October 21, 2026 (00:00–24:00 UTC): 3 µg/m³ from 12 sensors that passed the quality check — the same value as in the Atmy Data Hub.

What is the air quality in Los Angeles right now?

Right now in Los Angeles, PM2.5 averages 0.4 µg/m³ — “good” on the US EPA scale (approximate, from hourly readings). Mean of 12 sensors on the Atmy network, readings from 10:46–10:47 local time (17:46–17:47 UTC), summary prepared at 11:00 local time. Median: 0.0 µg/m³; range across sensors: 0.0–1.7 µg/m³.

Is it safe to be outdoors in Los Angeles now?

The current level is “good” (US EPA scale, approximate). Air quality is satisfactory; no restrictions are recommended. This is the standard guidance of the scale, not medical advice.

Where in Los Angeles is the air worse?

Highest current reading: 1.7 µg/m³ (North Hollywood). Lowest: 0.0 µg/m³ (Elysian Heights (Preston Ave)). The list shows every sensor, highest first.

Where do these data come from?

From Atmy sensors and connected public networks (citizen, experimental and government monitors), aggregated by Atmy. Values are approximate; see the methodology.

How often is this page updated?

The summary is rebuilt every 15 minutes from the latest reading of each sensor, each no older than one hour.

Is the air in Los Angeles polluted?

Over the last 365 days with data, the mean daily PM2.5 in Los Angeles was 11.2 µg/m³ — 2.2 times the WHO annual guideline (5 µg/m³). Over the last 30 days: 7.1 µg/m³. From Atmy's archive of daily city means.

When is the air in Los Angeles cleanest?

In Atmy's daily archive, the cleanest month of the last year was April 2026: 4.4 µg/m³ on average.

When is the air in Los Angeles most polluted?

The most polluted month of the last year was December 2025: 19.3 µg/m³ on average.

Is the air in Los Angeles worse in the heating season?

From November to March the mean daily PM2.5 was 13.7 µg/m³, from June to August 10.4 µg/m³ (last 365 days).

Data

Where do these data come from?

The daily value is the Data Hub’s: the mean of the city’s sensors that passed the nightly quality check, each with at least 12 valid hours, and only with sensors at four places 500 m apart; days are UTC.

“Now” uses the same sensors and rule: the mean of their latest readings, each at most 60 minutes old, shown only with sensors at four places 500 m apart reporting.

Source: public Atmy monitoring data. Methodology and data sources · Data terms