What is the air quality trend in Dale City?

Over the past 8 days, Dale City had an average AQI of 78 based on station measurements. The worst day was 2026-07-17 with AQI 164.

How is Dale City air quality measured?

Air quality in Dale City 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 Dale City, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	22	12–28	5.2 µg/m³	7h	30
2026-07-21	51	28–77	13.8 µg/m³	24h	31
2026-07-20	67	53–80	19.7 µg/m³	24h	32
2026-07-19	66	42–89	19.3 µg/m³	24h	35
2026-07-18	128	54–157	48.4 µg/m³	24h	34
2026-07-17	164	70–221	94.4 µg/m³	24h	35
2026-07-16	82	55–159	27.1 µg/m³	24h	35
2026-07-15	51	38–60	12.8 µg/m³	16h	35

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