Winnipeg vs West Fargo: PM2.5 compared

Over the last year, West Fargo's air was 15% more polluted than Winnipeg's: PM2.5 averaged 7.1 µg/m³ against 6.2, on the 280 days both cities were measured. West Fargo had the dirtier air on 201 of those days, Winnipeg on 77. West Fargo was over the WHO's daily guideline of 15 µg/m³ on 15 of them, Winnipeg on 32.

Right now

Winnipeg#2,399on the 24-hour board of 2,753, at 16 US AQI (2.8 µg/m³)

West Fargo#963on the 24-hour board of 2,753, at 48 US AQI (8.7 µg/m³)

The last year, day by day

Winnipeg

West Fargo

Each city's daily mean from 9 Oct 2025 to 8 Oct 2026, one stripe a day, coloured by band. A blank stripe is a day without a daily mean.

Month by month

Monthly means in µg/m³ over the days both cities were measured. Solid: Winnipeg. Faded: West Fargo. A month shows once both share 10 such days. Dashed line: the WHO daily guideline, 15 µg/m³.

Year by year

Year	Winnipeg	West Fargo	Days both measured	Days Winnipeg was worse
2026 so far	39	42	219	65
2025	48	42	114	37

Means in US AQI over the days both cities were measured that year; a year shows once they share 30 such days.

Each city's worst days

Winnipeg

16 Jul 202617082.1 µg/m³
23 Jul 202610838.3 µg/m³
14 Feb 202610537.1 µg/m³

West Fargo

16 Jul 2026191112.0 µg/m³
17 Jul 202612445.0 µg/m³
15 Jul 202611440.7 µg/m³

Daily means in US AQI, with µg/m³ beside them, since the index stops at its top value, over the days both cities were measured in the last year. Each date opens that day's world board.

Compare either city with another

Winnipeg

Side by side with Castlegar (Canada's worst on 30 days), Gujranwala (the world's worst on 30 days).

West Fargo

Side by side with Detroit Lakes (the nearest), Mecca (United States's worst on 30 days), Gujranwala (the world's worst on 30 days).

Use this page

SmogRank, PM2.5 daily means compared, Winnipeg and West Fargo, 9 Oct 2025 – 8 Oct 2026, smogrank.com/compare/ca-winnipeg/us-west-fargo (accessed 9 Oct 2026).

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.

Updated 2026-10-09 12:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published (why we use them).