What is the air quality trend in Annandale?

Over the past 8 days, Annandale had an average AQI of 79 based on station measurements. The worst day was 2026-07-17 with AQI 169.

How is Annandale air quality measured?

Air quality in Annandale 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 Annandale, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 3 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	24	23–26	5.9 µg/m³	2h	18
2026-07-21	52	30–74	14.4 µg/m³	24h	30
2026-07-20	68	56–84	20.3 µg/m³	24h	30
2026-07-19	66	37–125	19.4 µg/m³	24h	31
2026-07-18	128	56–159	48.8 µg/m³	24h	32
2026-07-17	169	74–218	99.4 µg/m³	24h	34
2026-07-16	78	53–209	27.7 µg/m³	24h	31
2026-07-15	52	42–80	13.4 µg/m³	21h	33

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