SmogRank / United States / Washington / Anacortes
Anacortes, month by month
Anacortes has a measured daily mean on 1,194 days since 1 January 2023. Its worst month was June 2025, at 47 US AQI (8.5 µg/m³), 1,720th of 2,508 cities on that month's world ranking. Its cleanest was March 2026, at 7 US AQI (1.2 µg/m³). 2025 averaged 39 US AQI (7.1 µg/m³), against 21 US AQI (3.7 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
6 months
| Month | Why |
|---|---|
| Jan 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. |
| Dec 2025 | 6 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks. |
| Nov 2025 | 15 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | 17 of 31 days measured; a month needs 22. The others: 14 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 | 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.
Anacortes's worst months
| Month | US AQI | World rank |
|---|---|---|
| June 2025 | 478.5 µg/m³ | 1,720thof 2,508 |
| September 2025 | 458.1 µg/m³ | 1,205thof 3,104 |
| May 2025 | 448.0 µg/m³ | 1,352ndof 2,826 |
| August 2025 | 437.8 µg/m³ | 1,882ndof 2,901 |
| April 2025 | 437.7 µg/m³ | 1,841stof 2,951 |
| October 2025 | 427.6 µg/m³ | 989thof 2,614 |
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.
Anacortes's worst days
| Day | US AQI |
|---|---|
| 7 Jul 2023 | 16169.4 µg/m³ |
| 30 Jan 2023 | 8829.2 µg/m³ |
| 26 Aug 2023 | 7321.1 µg/m³ |
| 5 Aug 2026 | 6818.3 µg/m³ |
| 27 Aug 2023 | 6617.2 µg/m³ |
| 25 Aug 2023 | 6014.1 µg/m³ |
| 28 Aug 2023 | 5913.4 µg/m³ |
| 6 Aug 2026 | 5812.6 µg/m³ |
| 22 Jul 2026 | 5712.3 µg/m³ |
| 17 Oct 2025 | 5310.1 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, Anacortes, 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/anacortes/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.
Anacortes now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 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).