What is the air quality trend in Lethbridge?

Over the past 20 days, Lethbridge had an average AQI of 68 based on station measurements. The worst day was 2026-05-18 with AQI 93.

How is Lethbridge air quality measured?

Air quality in Lethbridge 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 Lethbridge, Canada

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

256h

PM2.5 Station

256h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	45	3–151	14.6 µg/m³	9h	1
2026-05-28	52	12–116	15.8 µg/m³	8h	1
2026-05-27	65	12–154	21.4 µg/m³	13h	1
2026-05-26	77	17–181	31.8 µg/m³	13h	1
2026-05-25	73	10–215	34.7 µg/m³	16h	1
2026-05-24	86	3–266	39.0 µg/m³	12h	1
2026-05-23	88	14–168	35.6 µg/m³	9h	1
2026-05-22	80	3–172	32.7 µg/m³	11h	1
2026-05-21	58	12–195	23.6 µg/m³	14h	1
2026-05-20	47	5–154	15.4 µg/m³	16h	1
2026-05-19	81	4–349	53.6 µg/m³	7h	1
2026-05-18	93	25–174	35.8 µg/m³	9h	1
2026-05-17	57	7–150	17.8 µg/m³	10h	1
2026-05-16	63	10–183	23.3 µg/m³	15h	1
2026-05-15	65	3–185	25.3 µg/m³	13h	1
2026-05-14	61	1–171	21.1 µg/m³	19h	1
2026-05-13	76	3–190	31.9 µg/m³	15h	1
2026-05-12	83	6–260	35.6 µg/m³	15h	1
2026-05-11	60	11–278	27.7 µg/m³	15h	1
2026-05-10	55	16–139	17.0 µg/m³	17h	2

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