What is the air quality trend in Chantilly?

Over the past 8 days, Chantilly had an average AQI of 83 based on station measurements. The worst day was 2026-07-17 with AQI 165.

How is Chantilly air quality measured?

Air quality in Chantilly 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 Chantilly, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	53	29–74	14.4 µg/m³	23h	29
2026-07-20	69	58–83	20.4 µg/m³	24h	30
2026-07-19	64	36–91	18.5 µg/m³	24h	32
2026-07-18	131	59–161	51.1 µg/m³	24h	32
2026-07-17	165	56–218	95.9 µg/m³	24h	34
2026-07-16	84	54–173	29.5 µg/m³	24h	32
2026-07-15	51	37–79	12.9 µg/m³	24h	33
2026-07-14	47	47–47	11.2 µg/m³	1h	30

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