What is the air quality trend in Gwynn Oak?

Over the past 8 days, Gwynn Oak had an average AQI of 76 based on station measurements. The worst day was 2026-07-17 with AQI 164.

How is Gwynn Oak air quality measured?

Air quality in Gwynn Oak 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 Gwynn Oak, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	28	28–28	6.6 µg/m³	1h	2
2026-07-21	53	28–75	14.5 µg/m³	24h	23
2026-07-20	69	59–82	20.7 µg/m³	24h	22
2026-07-19	60	25–90	17.5 µg/m³	24h	23
2026-07-18	128	50–157	49.3 µg/m³	24h	23
2026-07-17	164	59–221	96.5 µg/m³	24h	24
2026-07-16	56	38–60	14.8 µg/m³	24h	23
2026-07-15	50	44–57	12.4 µg/m³	23h	24

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