What is the air quality trend in Algonquin?

Over the past 8 days, Algonquin had an average AQI of 102 based on station measurements. The worst day was 2026-07-17 with AQI 228.

How is Algonquin air quality measured?

Air quality in Algonquin 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 Algonquin, United States

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 6 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	63	32–96	18.6 µg/m³	22h	110
2026-07-20	99	59–109	34.6 µg/m³	24h	112
2026-07-19	110	42–161	40.3 µg/m³	24h	118
2026-07-18	51	33–90	13.4 µg/m³	23h	122
2026-07-17	228	68–353	173.5 µg/m³	24h	124
2026-07-16	154	50–330	100.7 µg/m³	24h	114
2026-07-15	53	51–63	13.0 µg/m³	24h	118
2026-07-14	60	60–61	16.6 µg/m³	2h	124

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