What is the air quality trend in Waterdown?

Over the past 8 days, Waterdown had an average AQI of 52 based on station measurements. The worst day was 2026-05-23 with AQI 69.

How is Waterdown air quality measured?

Air quality in Waterdown 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 Waterdown, Canada

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

Historical PM2.5 and AQI trend from monitoring stations near Waterdown, Canada.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

169h

PM2.5 Station

169h · 15 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	46	28–110	12.6 µg/m³	1.9	9h	11
2026-05-29	54	8–143	16.0 µg/m³	12.1	24h	14
2026-05-28	36	18–98	9.2 µg/m³	1.6	24h	13
2026-05-27	61	18–159	19.3 µg/m³	6.1	24h	13
2026-05-26	44	19–110	11.7 µg/m³	6.0	24h	11
2026-05-25	64	26–152	19.0 µg/m³	11.2	24h	14
2026-05-24	44	20–78	11.6 µg/m³	7.1	24h	14
2026-05-23	69	23–162	22.0 µg/m³	3.1	16h	15

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