What is the air quality trend in Fitchburg?

Over the past 8 days, Fitchburg had an average AQI of 60 based on station measurements. The worst day was 2026-07-17 with AQI 88.

How is Fitchburg air quality measured?

Air quality in Fitchburg 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 Fitchburg, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

162h

PM2.5 Station

162h · 3 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	27	25–29	6.5 µg/m³	3h	3
2026-07-21	48	10–90	13.0 µg/m³	21h	3
2026-07-20	54	20–82	15.0 µg/m³	23h	3
2026-07-19	59	22–169	18.8 µg/m³	23h	3
2026-07-18	75	23–248	29.1 µg/m³	23h	3
2026-07-17	88	26–174	32.2 µg/m³	24h	4
2026-07-16	83	23–218	36.8 µg/m³	24h	4
2026-07-15	52	20–169	16.0 µg/m³	21h	4

Back to Fitchburg Air Quality