What is the air quality trend in Downey?

Over the past 7 days, Downey had an average AQI of 30 based on station measurements. The worst day was 2026-05-23 with AQI 56.

How is Downey air quality measured?

Air quality in Downey 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 Downey, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

155h

PM2.5 Station

155h · 1 station

Temperature GFS model

27pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-28	6	4–17	1.4 µg/m³	1.6	16h	1
2026-05-27	8	4–17	2.0 µg/m³	2.7	22h	1
2026-05-26	17	8–25	4.1 µg/m³	4.8	24h	1
2026-05-25	23	12–42	5.5 µg/m³	6.1	24h	1
2026-05-24	52	33–70	13.7 µg/m³	14.6	24h	1
2026-05-23	56	33–80	14.8 µg/m³	16.5	24h	1
2026-05-22	54	25–74	15.0 µg/m³	16.4	21h	1

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