What is the air quality trend in Alum Rock?

Over the past 8 days, Alum Rock had an average AQI of 30 based on station measurements. The worst day was 2026-06-02 with AQI 40.

How is Alum Rock air quality measured?

Air quality in Alum Rock 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 Alum Rock, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Alum Rock, 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 · 82 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	19	19–19	4.6 µg/m³	2h	82
2026-06-08	25	19–28	6.0 µg/m³	24h	80
2026-06-07	28	26–30	6.6 µg/m³	24h	80
2026-06-06	33	27–46	8.0 µg/m³	24h	77
2026-06-05	40	36–43	9.7 µg/m³	24h	81
2026-06-04	27	20–35	6.6 µg/m³	24h	81
2026-06-03	32	28–36	7.7 µg/m³	24h	80
2026-06-02	40	36–45	9.7 µg/m³	20h	80

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