What is the air quality trend in Hermosa Beach?

Over the past 7 days, Hermosa Beach had an average AQI of 24 based on station measurements. The worst day was 2026-10-20 with AQI 32.

How is Hermosa Beach air quality measured?

Air quality in Hermosa 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 Hermosa Beach, United States

Name: Hermosa 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 Hermosa 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 · 225 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	20–45	7.8 µg/m³	5.0	22h	196
2026-10-19	27	21–33	6.5 µg/m³	4.2	24h	226
2026-10-18	24	17–30	5.7 µg/m³	3.7	24h	209
2026-10-17	21	15–26	5.1 µg/m³	3.8	24h	225
2026-10-16	22	15–31	5.2 µg/m³	3.8	24h	216
2026-10-15	24	16–29	5.7 µg/m³	4.2	24h	225
2026-10-14	23	18–26	5.5 µg/m³	3.7	24h	225

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