What is the air quality trend in Saint-Hyacinthe?

Over the past 8 days, Saint-Hyacinthe had an average AQI of 56 based on station measurements. The worst day was 2026-07-14 with AQI 77.

How is Saint-Hyacinthe air quality measured?

Air quality in Saint-Hyacinthe 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 Saint-Hyacinthe, Canada

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

Historical PM2.5 and AQI trend from monitoring stations near Saint-Hyacinthe, Canada.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 2 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	52	32–83	14.2 µg/m³	10.5	21h	9
2026-07-20	43	21–71	10.8 µg/m³	7.6	24h	10
2026-07-19	45	14–99	12.3 µg/m³	6.8	24h	10
2026-07-18	58	28–140	17.0 µg/m³	13.1	24h	11
2026-07-17	46	14–172	16.6 µg/m³	3.5	24h	9
2026-07-16	58	12–172	18.8 µg/m³	13.4	24h	8
2026-07-15	73	29–109	23.0 µg/m³	27.5	24h	7
2026-07-14	77	72–79	24.2 µg/m³	24.6	3h	8

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