SmogRank / Canada / Quebec / Saint-Georges

Saint-Georges, month by month

Saint-Georges has a measured daily mean on 117 days since 16 June 2026. Its worst month was July 2026, at 53 US AQI (10.0 µg/m³), 1,357th of 2,784 cities on that month's world ranking. Its cleanest was September 2026, at 28 US AQI (5.1 µg/m³).

Every month since 2026

2026too few days for a mean (a year needs 199)117 days measured

JanFebMarAprMayJun15 daysJul53#1,357 Aug39#2,047 Sep28#2,284 Oct21#2,535

Each square is a month's mean PM2.5 in US AQI from Saint-Georges's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Saint-Georges marked; each year, the year's. A dashed square is the running month, so far.

Good0–50

Moderate51–100

Sensitive groups101–150

Unhealthy151–200

Very unhealthy201–300

Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Months without a mean, and why

1 month

Month	Why
Jun 2026	15 of 30 days measured; a month needs 21.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Saint-Georges's worst months

Month	US AQI	Days measured	World rank
July 2026	5310.0 µg/m³	31 of 31	1,357thof 2,784
August 2026	397.1 µg/m³	31 of 31	2,047thof 2,896
September 2026	285.1 µg/m³	30 of 30	2,284thof 2,981

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Saint-Georges's worst days

Day	US AQI
14 Jul 2026	7120.0 µg/m³
30 Jun 2026	6818.2 µg/m³
13 Jul 2026	6315.5 µg/m³
15 Jul 2026	6215.1 µg/m³
4 Jul 2026	6114.3 µg/m³
18 Jul 2026	6114.3 µg/m³
25 Jul 2026	6013.8 µg/m³
29 Jun 2026	5913.5 µg/m³
16 Aug 2026	5913.3 µg/m³
7 Jul 2026	5812.8 µg/m³

Daily means, the highest since 16 Jun 2026; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Saint-Georges, Canada, 16 Jun 2026 – 10 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ca/saint-georges/history (accessed 12 Oct 2026).

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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.

Saint-Georges now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 20:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).