What is the air quality trend in Los Angeles?

Over the past 15 days, Los Angeles had an average AQI of 10 based on station measurements. The worst day was 2026-10-10 with AQI 20.

How is Los Angeles air quality measured?

Air quality in Los Angeles is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Los Angeles, United States

Name: Los Angeles Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Los Angeles, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

310h

PM2.5 Station

310h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	6	4–12	1.6 µg/m³	1.9	6h	2
2026-10-20	15	2–29	3.7 µg/m³	4.2	24h	2
2026-10-19	10	2–23	2.4 µg/m³	2.7	24h	2
2026-10-18	8	2–63	1.9 µg/m³	2.4	21h	1
2026-10-17	3	1–5	0.7 µg/m³	0.7	19h	1
2026-10-16	4	1–8	0.8 µg/m³	0.9	17h	1
2026-10-15	8	1–19	1.8 µg/m³	2.0	20h	2
2026-10-14	6	1–21	1.6 µg/m³	1.7	22h	2
2026-10-13	5	2–15	1.1 µg/m³	1.4	24h	2
2026-10-12	5	1–12	1.2 µg/m³	1.5	20h	2
2026-10-11	13	5–25	3.1 µg/m³	3.5	24h	2
2026-10-10	20	7–46	4.7 µg/m³	4.9	24h	2
2026-10-09	19	2–38	4.5 µg/m³	4.8	24h	2
2026-10-08	17	1–34	4.1 µg/m³	4.3	24h	2
2026-10-07	13	8–29	3.2 µg/m³	3.4	17h	2

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