What is the air quality trend in Foggy Bottom?

Over the past 8 days, Foggy Bottom had an average AQI of 82 based on station measurements. The worst day was 2026-07-17 with AQI 163.

How is Foggy Bottom air quality measured?

Air quality in Foggy Bottom 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 Foggy Bottom, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Foggy Bottom, 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
2026-07-21	55	17–72	15.2 µg/m³	21h	28
2026-07-20	68	53–87	20.0 µg/m³	24h	29
2026-07-19	64	38–87	18.8 µg/m³	24h	32
2026-07-18	128	59–159	48.6 µg/m³	24h	32
2026-07-17	163	58–216	93.5 µg/m³	24h	34
2026-07-16	82	54–224	30.8 µg/m³	24h	31
2026-07-15	51	44–73	12.8 µg/m³	24h	32
2026-07-14	50	49–51	11.9 µg/m³	3h	32

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