What is the air quality trend in Martinsburg?

Over the past 7 days, Martinsburg had an average AQI of 89 based on station measurements. The worst day was 2026-07-17 with AQI 171.

How is Martinsburg air quality measured?

Air quality in Martinsburg 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 Martinsburg, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

157h

PM2.5 Station

157h · 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	45	18–91	12.1 µg/m³	22h	2
2026-07-20	58	30–78	16.4 µg/m³	21h	3
2026-07-19	68	15–174	23.8 µg/m³	23h	3
2026-07-18	113	29–186	49.7 µg/m³	23h	3
2026-07-17	171	42–262	101.5 µg/m³	24h	4
2026-07-16	128	30–276	76.9 µg/m³	23h	3
2026-07-15	43	15–79	10.9 µg/m³	21h	4

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