What is the air quality trend in Chatham?

Over the past 21 days, Chatham had an average AQI of 42 based on station measurements. The worst day was 2026-05-10 with AQI 77.

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 Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

471h

PM2.5 Station

471h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-30	29	6–95	7.6 µg/m³	23h	2
2026-05-29	30	13–87	7.7 µg/m³	24h	2
2026-05-28	35	6–151	9.8 µg/m³	24h	2
2026-05-27	35	13–74	8.9 µg/m³	23h	3
2026-05-26	35	15–71	8.7 µg/m³	24h	2
2026-05-25	45	17–155	13.2 µg/m³	24h	2
2026-05-24	38	5–91	11.1 µg/m³	24h	2
2026-05-23	41	2–176	13.8 µg/m³	24h	2
2026-05-22	32	9–160	9.8 µg/m³	22h	2
2026-05-21	55	4–204	20.7 µg/m³	24h	3
2026-05-20	61	5–452	38.2 µg/m³	24h	2
2026-05-19	35	15–84	9.5 µg/m³	24h	2
2026-05-18	49	30–99	13.0 µg/m³	23h	2
2026-05-17	43	13–58	10.6 µg/m³	21h	1
2026-05-16	35	14–67	8.7 µg/m³	22h	2
2026-05-15	44	8–154	13.0 µg/m³	24h	3
2026-05-14	37	10–157	10.3 µg/m³	24h	3
2026-05-13	55	15–344	23.4 µg/m³	24h	2
2026-05-12	32	10–80	7.9 µg/m³	24h	3
2026-05-11	45	5–155	13.6 µg/m³	24h	3
2026-05-10	77	77–77	24.7 µg/m³	1h	7

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