What is the air quality trend in Alpharetta?

Over the past 2 days, Alpharetta had an average AQI of 5 based on station measurements. The worst day was 2026-10-20 with AQI 7.

How is Alpharetta air quality measured?

Air quality in Alpharetta 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 Alpharetta, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

11h

PM2.5 Station

11h · 1 station

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	4	4–5	1.1 µg/m³	0.4	2h	1
2026-10-20	7	2–13	1.6 µg/m³	2.1	9h	1

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