SmogRank / Canada / British Columbia / Prince George
Prince George, month by month
Prince George has a measured daily mean on 1,185 days since 1 January 2023. Its worst month was September 2023, at 90 US AQI (29.8 µg/m³), 39th of 2,176 cities on that month's world ranking. Its cleanest was May 2024, at 19 US AQI (3.5 µg/m³). 2025 averaged 51 US AQI (9.1 µg/m³), against 51 US AQI (9.1 µg/m³) in 2024.
Every month since 2023
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
5 months
| Month | Why |
|---|---|
| Jan 2026 | 5 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2023 | 10 of 30 days measured; a month needs 21. The others: 20 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 10 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks. |
| Feb 2023 | 1 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 2 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Prince George's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| September 2023 | 9029.8 µg/m³ | 39thof 2,176 | Alberta, Saskatchewan and British Columbia, Canada, September 2023 Alberta, British Columbia and Saskatchewan, Canada, September 2023and 1 more |
| July 2023 | 8024.9 µg/m³ | 54thof 1,432 | Alberta, British Columbia and Saskatchewan, Canada, July 2023 Alberta and British Columbia, Canada, July 2023 |
| September 2025 | 7421.6 µg/m³ | 179thof 3,104 | North-western Canada and United States, September 2025 North-western United States and Canada, August and September 2025 |
| May 2023 | 6919.0 µg/m³ | 112thof 1,600 | Northern United States and Canada, May 2023 |
| August 2024 | 6315.4 µg/m³ | 166thof 2,010 | North-western Canada and United States, August 2024 |
| June 2023 | 6214.8 µg/m³ | 389thof 1,603 | Alberta, Saskatchewan and British Columbia, Canada, June 2023 |
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.
Prince George's worst days
| Day | US AQI | Episode |
|---|---|---|
| 12 Jul 2023 | 245170.0 µg/m³ | Alberta, British Columbia and Saskatchewan, Canada, July 2023 |
| 16 Sept 2023 | 219144.0 µg/m³ | Alberta, Saskatchewan and British Columbia, Canada, September 2023 |
| 7 Sept 2024 | 187107.0 µg/m³ | – |
| 16 May 2023 | 17995.4 µg/m³ | Northern United States and Canada, May 2023 |
| 11 Jul 2023 | 17082.6 µg/m³ | Alberta, British Columbia and Saskatchewan, Canada, July 2023 |
| 18 May 2023 | 16981.6 µg/m³ | Northern United States and Canada, May 2023 |
| 15 Sept 2023 | 16980.8 µg/m³ | Alberta, Saskatchewan and British Columbia, Canada, September 2023 |
| 17 May 2023 | 16372.5 µg/m³ | Northern United States and Canada, May 2023 |
| 17 Sept 2023 | 16169.2 µg/m³ | Alberta, Saskatchewan and British Columbia, Canada, September 2023 |
| 3 Jun 2023 | 15967.6 µg/m³ | – |
Daily means, the highest since 1 Jan 2023; 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, Prince George, Canada, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ca/prince-george/history (accessed 12 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.
Prince George now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 21:07 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).