What is the air quality trend in Nashua?

Over the past 8 days, Nashua had an average AQI of 61 based on station measurements. The worst day was 2026-07-17 with AQI 92.

How is Nashua air quality measured?

Air quality in Nashua 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 Nashua, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Nashua, 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 · 3 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-21	44	21–58	10.8 µg/m³	12.2	20h	6
2026-07-20	44	20–96	11.3 µg/m³	5.8	24h	6
2026-07-19	54	27–119	14.7 µg/m³	21.6	24h	7
2026-07-18	78	27–168	26.4 µg/m³	46.7	24h	6
2026-07-17	92	20–180	35.9 µg/m³	4.1	24h	7
2026-07-16	66	44–168	20.3 µg/m³	—	24h	6
2026-07-15	58	47–80	15.8 µg/m³	26.6	24h	6
2026-07-14	57	50–67	14.9 µg/m³	21.6	4h	4

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