What is the air quality trend in Severn?

Over the past 8 days, Severn had an average AQI of 77 based on station measurements. The worst day was 2026-07-17 with AQI 165.

How is Severn air quality measured?

Air quality in Severn 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 Severn, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 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	52	27–74	14.3 µg/m³	24h	28
2026-07-20	69	54–85	20.4 µg/m³	24h	28
2026-07-19	61	37–89	17.6 µg/m³	24h	29
2026-07-18	130	60–158	49.5 µg/m³	24h	30
2026-07-17	165	58–220	97.1 µg/m³	24h	31
2026-07-16	63	34–152	17.7 µg/m³	24h	29
2026-07-15	52	43–83	13.2 µg/m³	22h	30

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