SmogRank / United States / Washington / North Bend
North Bend, month by month
North Bend has a measured daily mean on 1,277 days since 1 January 2023. Its worst month was August 2026, at 60 US AQI (13.7 µg/m³), 447th of 2,896 cities on that month's world ranking. Its cleanest was January 2024, at 9 US AQI (1.7 µg/m³). 2025 averaged 23 US AQI (4.1 µg/m³), against 17 US AQI (3.1 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
4 months
| Month | Why |
|---|---|
| Nov 2025 | 20 of 30 days measured; a month needs 21. The others: 2 with no readings from the monitor, 8 with readings for part of the day (a day needs 18 hours). |
| Apr 2025 | 20 of 30 days measured; a month needs 21. The others: 7 with no readings from the monitor, 3 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 | No day measured. The others: 2 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours), 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
North Bend's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| August 2026 | 6013.7 µg/m³ | 447thof 2,896 | North-western United States and Canada, 4 to 22 August 2026 |
| September 2025 | 519.1 µg/m³ | 870thof 3,104 | – |
| August 2025 | 376.7 µg/m³ | 2,290thof 2,901 | – |
| August 2024 | 325.8 µg/m³ | 1,783rdof 2,010 | – |
| September 2024 | 325.7 µg/m³ | 1,594thof 2,010 | – |
| July 2026 | 295.2 µg/m³ | 2,567thof 2,784 | – |
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.
North Bend's worst days
| Day | US AQI | Episode |
|---|---|---|
| 5 Aug 2026 | 16473.9 µg/m³ | North-western United States and Canada, 4 to 22 August 2026 |
| 4 Aug 2026 | 15763.9 µg/m³ | North-western United States and Canada, 4 to 22 August 2026 |
| 6 Aug 2026 | 14754.0 µg/m³ | North-western United States and Canada, 4 to 22 August 2026 |
| 23 Sept 2025 | 8828.8 µg/m³ | – |
| 7 Aug 2026 | 8828.8 µg/m³ | North-western United States and Canada, 4 to 22 August 2026 |
| 24 Sept 2025 | 8527.1 µg/m³ | – |
| 7 Sept 2024 | 7120.1 µg/m³ | – |
| 6 Sept 2024 | 7019.2 µg/m³ | – |
| 21 Aug 2023 | 6918.9 µg/m³ | – |
| 28 Aug 2023 | 6918.8 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, North Bend, United States, 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/us/north-bend-washington/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.
North Bend now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 18:07 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).