What is the air quality trend in Chatham?

Over the past 20 days, Chatham had an average AQI of 22 based on station measurements. The worst day was with AQI .

How is Chatham air quality measured?

Air quality in Chatham 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 Chatham, Canada

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

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

Current AQI
Good

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Trend

355h

PM2.5 Trend

355h · 1 station

Daily Summary

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-04-18	14	12–24	3.5 µg/m³	8h	1
2026-04-17	13	7–27	3.1 µg/m³	15h	1
2026-04-16	18	8–30	4.3 µg/m³	24h	1
2026-04-15	18	9–44	4.4 µg/m³	24h	1
2026-04-14	21	11–40	5.0 µg/m³	24h	1
2026-04-13	35	19–52	8.3 µg/m³	14h	1
2026-04-12	28	15–48	6.7 µg/m³	22h	1
2026-04-11	15	12–20	3.6 µg/m³	22h	1
2026-04-10	17	10–34	4.0 µg/m³	21h	1
2026-04-09	34	20–55	8.3 µg/m³	15h	1
2026-04-08	15	15–16	3.7 µg/m³	8h	1
2026-04-07	10	5–15	2.4 µg/m³	22h	1
2026-04-06	18	10–25	4.3 µg/m³	18h	1
2026-04-04	11	4–17	2.6 µg/m³	13h	1
2026-04-03	25	11–51	6.0 µg/m³	22h	1
2026-04-02	22	13–37	5.4 µg/m³	20h	1
2026-04-01	12	6–17	2.9 µg/m³	19h	1
2026-03-31	49	16–62	12.1 µg/m³	20h	1
2026-03-30	48	28–69	12.2 µg/m³	10h	1
2026-03-29	25	20–29	5.9 µg/m³	14h	1

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