What is the air quality trend in Dupont Circle?

Over the past 15 days, Dupont Circle had an average AQI of 24 based on station measurements. The worst day was 2026-10-14 with AQI 40.

How is Dupont Circle air quality measured?

Air quality in Dupont Circle 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 Dupont Circle, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

334h

PM2.5 Station

334h · 20 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	24	24–24	5.7 µg/m³	1h	20
2026-10-20	23	15–31	5.5 µg/m³	24h	19
2026-10-19	25	18–30	6.0 µg/m³	24h	22
2026-10-18	18	15–21	4.2 µg/m³	24h	19
2026-10-17	16	12–24	3.7 µg/m³	24h	20
2026-10-16	29	15–50	6.9 µg/m³	24h	20
2026-10-15	29	19–52	7.0 µg/m³	24h	22
2026-10-14	40	33–49	9.6 µg/m³	24h	20
2026-10-13	26	20–37	6.2 µg/m³	24h	20
2026-10-12	15	10–23	3.7 µg/m³	24h	21
2026-10-11	17	11–24	4.2 µg/m³	24h	22
2026-10-10	32	22–41	7.8 µg/m³	24h	20
2026-10-09	27	18–53	6.5 µg/m³	24h	22
2026-10-08	26	20–33	6.2 µg/m³	24h	23
2026-10-07	24	20–27	5.8 µg/m³	21h	21

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