SmogRank / Canada / British Columbia / Port Alberni
Port Alberni, month by month
Port Alberni has a measured daily mean on 1,168 days since 1 January 2023. Its worst month was August 2025, at 58 US AQI (12.6 µg/m³), 654th of 2,901 cities on that month's world ranking. Its cleanest was June 2024, at 13 US AQI (2.3 µg/m³). 2025 averaged 39 US AQI (7.1 µg/m³), against 32 US AQI (5.7 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
9 months
| Month | Why |
|---|---|
| Oct 2026 | 7 of 11 days measured; a month needs 8. The others: 3 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Sep 2026 | 18 of 30 days measured; a month needs 21. The others: 3 with readings for part of the day (a day needs 18 hours), 9 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | 20 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| May 2026 | 16 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Oct 2025 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Jul 2025 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | No day measured. The others: 25 missing from OpenAQ's archive, 3 with under 18 hours of readings or readings that failed our checks. |
| Jan 2023 | 15 of 31 days measured; a month needs 22. The others: 6 missing from OpenAQ's archive, 10 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.
Port Alberni's worst months
| Month | US AQI | World rank |
|---|---|---|
| August 2025 | 5812.6 µg/m³ | 654thof 2,901 |
| January 2024 | 5511.5 µg/m³ | 742ndof 2,385 |
| January 2025 | 5410.9 µg/m³ | 848thof 2,474 |
| January 2026 | 5310.0 µg/m³ | 1,109thof 2,617 |
| February 2025 | 498.9 µg/m³ | 1,367thof 2,633 |
| December 2024 | 498.8 µg/m³ | 1,130thof 2,616 |
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.
Port Alberni's worst days
| Day | US AQI | Episode |
|---|---|---|
| 15 Aug 2025 | 17083.3 µg/m³ | – |
| 30 Jan 2023 | 10637.6 µg/m³ | – |
| 20 Aug 2023 | 9331.7 µg/m³ | North-western United States and Canada, August 2023 |
| 6 Aug 2026 | 8326.5 µg/m³ | North-western United States and Canada, 4 to 22 August 2026 |
| 14 Jan 2024 | 8225.6 µg/m³ | – |
| 26 Aug 2023 | 8024.5 µg/m³ | North-western United States and Canada, August 2023 |
| 28 Oct 2023 | 8024.4 µg/m³ | – |
| 18 Jan 2026 | 7924.2 µg/m³ | – |
| 13 Aug 2025 | 7924.0 µg/m³ | – |
| 14 Aug 2025 | 7622.7 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, Port Alberni, 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/port-alberni/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.
Port Alberni now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 23:07 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).