What is the air quality trend in Danbury?

Over the past 8 days, Danbury had an average AQI of 76 based on station measurements. The worst day was 2026-07-17 with AQI 125.

How is Danbury air quality measured?

Air quality in Danbury 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 Danbury, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Danbury, 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 · 5 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	45	20–70	11.5 µg/m³	21h	4
2026-07-20	55	15–93	15.6 µg/m³	24h	4
2026-07-19	68	30–143	20.3 µg/m³	24h	4
2026-07-18	103	60–166	38.0 µg/m³	24h	5
2026-07-17	125	45–188	55.8 µg/m³	24h	5
2026-07-16	103	54–179	40.2 µg/m³	24h	6
2026-07-15	74	32–178	26.0 µg/m³	24h	5
2026-07-14	39	32–46	9.4 µg/m³	2h	6

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