SmogRank / Canada / New Brunswick / Bathurst
Bathurst, month by month
Bathurst has a measured daily mean on 1,235 days since 1 January 2023. Its worst month was July 2025, at 52 US AQI (9.8 µg/m³), 1,310th of 2,889 cities on that month's world ranking. Its cleanest was November 2024, at 13 US AQI (2.3 µg/m³). 2025 averaged 26 US AQI (4.6 µg/m³), against 23 US AQI (4.1 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 |
|---|---|
| Jun 2025 | 19 of 30 days measured; a month needs 21. The others: 2 with no readings from the monitor, 9 with readings for part of the day (a day needs 18 hours). |
| May 2025 | No day measured. The others: 3 with no readings from the monitor, 28 with readings for part of the day (a day needs 18 hours). |
| Apr 2025 | 8 of 30 days measured; a month needs 21. The others: 1 with no readings from the monitor, 21 with readings for part of the day (a day needs 18 hours). |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Bathurst's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2025 | 529.8 µg/m³ | 1,310thof 2,889 | North-eastern United States and Canada, 29 July to 9 August 2025 Northern United States and Canada, July 2025 |
| July 2026 | 519.1 µg/m³ | 1,581stof 2,784 | – |
| August 2024 | 458.1 µg/m³ | 1,194thof 2,010 | – |
| August 2026 | 448.0 µg/m³ | 1,619thof 2,896 | – |
| June 2023 | 427.6 µg/m³ | 1,156thof 1,603 | – |
| July 2023 | 427.6 µg/m³ | 908thof 1,432 | – |
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.
Bathurst's worst days
| Day | US AQI | Episode |
|---|---|---|
| 30 Jun 2026 | 13248.1 µg/m³ | – |
| 3 Aug 2025 | 10737.8 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
| 16 Jul 2025 | 8627.7 µg/m³ | Northern United States and Canada, July 2025 |
| 15 Jul 2025 | 8024.9 µg/m³ | Northern United States and Canada, July 2025 |
| 19 Jul 2025 | 7823.4 µg/m³ | – |
| 16 Aug 2026 | 7823.4 µg/m³ | – |
| 23 Jun 2023 | 7722.9 µg/m³ | – |
| 18 Jul 2023 | 7321.0 µg/m³ | – |
| 1 Jul 2026 | 7320.9 µg/m³ | – |
| 16 Aug 2024 | 7220.2 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, Bathurst, 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/bathurst/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.
Bathurst now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 17:07 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).