What is the air quality trend in Hagerstown?

Over the past 7 days, Hagerstown had an average AQI of 70 based on station measurements. The worst day was 2026-07-17 with AQI 116.

How is Hagerstown air quality measured?

Air quality in Hagerstown 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 Hagerstown, United States

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

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

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

102h

PM2.5 Station

102h · 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	42	21–71	10.8 µg/m³	16h	1
2026-07-20	42	1–93	11.7 µg/m³	18h	1
2026-07-19	85	12–273	42.7 µg/m³	15h	1
2026-07-18	66	1–188	27.0 µg/m³	14h	1
2026-07-17	116	3–243	63.4 µg/m³	16h	1
2026-07-16	98	1–377	67.7 µg/m³	11h	1
2026-07-15	42	18–93	10.9 µg/m³	12h	1

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