What is the air quality trend in South Riding?

Over the past 7 days, South Riding had an average AQI of 89 based on station measurements. The worst day was 2026-07-17 with AQI 166.

How is South Riding air quality measured?

Air quality in South Riding 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 South Riding, United States

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

Historical PM2.5 and AQI trend from monitoring stations near South Riding, 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 · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	52	26–74	14.3 µg/m³	23h	30
2026-07-20	68	58–83	20.3 µg/m³	24h	31
2026-07-19	67	36–112	20.0 µg/m³	24h	32
2026-07-18	130	58–161	50.9 µg/m³	24h	33
2026-07-17	166	56–218	95.5 µg/m³	24h	35
2026-07-16	88	54–174	31.2 µg/m³	24h	33
2026-07-15	52	33–86	13.3 µg/m³	24h	34

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