What is the air quality trend in Fitchburg?

Over the past 15 days, Fitchburg had an average AQI of 47 based on station measurements. The worst day was 2026-07-17 with AQI 123.

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

286h

PM2.5 Station

286h · 2 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	29	21–44	7.0 µg/m³	4h	2
2026-07-21	44	24–71	11.1 µg/m³	18h	2
2026-07-20	51	2–154	15.0 µg/m³	20h	2
2026-07-19	51	23–133	14.0 µg/m³	17h	2
2026-07-18	54	12–158	16.4 µg/m³	22h	2
2026-07-17	123	23–309	71.6 µg/m³	22h	2
2026-07-16	43	7–162	12.9 µg/m³	21h	2
2026-07-15	60	10–288	26.2 µg/m³	21h	2
2026-07-14	35	10–59	8.5 µg/m³	23h	2
2026-07-13	34	9–66	8.5 µg/m³	19h	2
2026-07-12	51	14–245	19.3 µg/m³	20h	2
2026-07-11	33	17–59	7.9 µg/m³	21h	2
2026-07-10	33	13–42	7.8 µg/m³	20h	2
2026-07-09	36	16–56	8.6 µg/m³	21h	2
2026-07-08	37	13–92	9.6 µg/m³	17h	2

Back to Fitchburg Air Quality