What is the air quality trend in Derry?

Over the past 8 days, Derry had an average AQI of 52 based on station measurements. The worst day was 2026-07-17 with AQI 78.

How is Derry air quality measured?

Air quality in Derry 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 Derry, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Derry, 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 · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	38	31–50	9.1 µg/m³	4h	2
2026-07-21	35	15–52	8.4 µg/m³	24h	2
2026-07-20	48	18–265	18.5 µg/m³	24h	2
2026-07-19	48	24–137	13.1 µg/m³	24h	2
2026-07-18	52	26–97	14.4 µg/m³	24h	3
2026-07-17	78	22–184	29.6 µg/m³	24h	3
2026-07-16	63	33–165	19.7 µg/m³	24h	2
2026-07-15	55	32–126	15.0 µg/m³	19h	3

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