What is the air quality trend in Greater Upper Marlboro?

Over the past 8 days, Greater Upper Marlboro had an average AQI of 76 based on station measurements. The worst day was 2026-07-17 with AQI 167.

How is Greater Upper Marlboro air quality measured?

Air quality in Greater Upper Marlboro 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 Greater Upper Marlboro, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Greater Upper Marlboro, 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 · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	20	12–27	4.7 µg/m³	7h	26
2026-07-21	53	28–77	14.4 µg/m³	24h	28
2026-07-20	68	53–79	20.0 µg/m³	24h	27
2026-07-19	62	38–95	18.1 µg/m³	24h	29
2026-07-18	128	53–157	49.3 µg/m³	24h	29
2026-07-17	167	72–220	96.7 µg/m³	24h	30
2026-07-16	64	40–109	18.2 µg/m³	24h	28
2026-07-15	51	39–60	12.8 µg/m³	17h	29

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