What is the air quality trend in Vallejo?

Over the past 15 days, Vallejo had an average AQI of 24 based on station measurements. The worst day was 2026-08-30 with AQI 33.

How is Vallejo air quality measured?

Air quality in Vallejo 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 Vallejo, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 94 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	26	25–28	6.2 µg/m³	17h	94
2026-09-04	23	14–29	5.5 µg/m³	24h	94
2026-09-03	24	20–36	5.6 µg/m³	24h	94
2026-09-02	26	21–31	6.3 µg/m³	24h	92
2026-09-01	27	20–32	6.5 µg/m³	24h	89
2026-08-31	31	26–37	7.5 µg/m³	24h	97
2026-08-30	33	29–37	8.0 µg/m³	24h	97
2026-08-29	26	21–30	6.1 µg/m³	24h	98
2026-08-28	23	19–27	5.6 µg/m³	24h	98
2026-08-27	21	18–26	5.0 µg/m³	24h	97
2026-08-26	22	17–34	5.3 µg/m³	24h	98
2026-08-25	19	15–21	4.6 µg/m³	24h	96
2026-08-24	24	19–31	5.7 µg/m³	24h	97
2026-08-23	25	20–38	6.0 µg/m³	24h	95
2026-08-22	24	23–26	5.8 µg/m³	4h	94

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