What is the air quality trend in Allendale?

Over the past 8 days, Allendale had an average AQI of 111 based on station measurements. The worst day was 2026-07-17 with AQI 236.

How is Allendale air quality measured?

Air quality in Allendale 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 Allendale, United States

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

164h

PM2.5 Station

164h · 1 station

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	69	35–103	21.0 µg/m³	43.8	16h	3
2026-07-20	114	60–165	45.6 µg/m³	84.4	23h	2
2026-07-19	104	20–189	39.9 µg/m³	76.7	24h	2
2026-07-18	79	25–155	27.0 µg/m³	48.5	24h	2
2026-07-17	236	113–360	179.5 µg/m³	360.8	24h	2
2026-07-16	209	63–427	152.3 µg/m³	316.6	24h	2
2026-07-15	45	20–74	11.4 µg/m³	23.5	23h	2
2026-07-14	38	30–42	9.0 µg/m³	21.7	6h	2

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