What is the air quality trend in Seal Beach?

Over the past 7 days, Seal Beach had an average AQI of 25 based on station measurements. The worst day was 2026-10-20 with AQI 32.

How is Seal Beach air quality measured?

Air quality in Seal Beach 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 Seal Beach, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 169 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-20	32	19–43	7.8 µg/m³	5.2	24h	151
2026-10-19	28	21–34	6.7 µg/m³	4.3	24h	172
2026-10-18	24	20–31	5.8 µg/m³	3.7	24h	159
2026-10-17	23	16–29	5.5 µg/m³	3.8	24h	170
2026-10-16	23	15–36	5.6 µg/m³	3.8	24h	163
2026-10-15	25	17–33	6.0 µg/m³	4.2	24h	170
2026-10-14	24	18–26	5.7 µg/m³	3.5	22h	170

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