Air quality in Anacortes, Washington, United States of America today

Mr. Duck’s Air Quality Score

Good air today for Anacortes, Washington, United States of America

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Anacortes, Washington is classified as Good today. The primary pollutant measured is PM2.5, which represents fine particulate matter. The latest reported concentration for PM2.5 is 1.47 micrograms per cubic meter, based on a reference value of 1.4725. The value is presented to two decimal places, reflecting the precision of the monitoring instruments. Ten valid measurements were recorded for this assessment, providing the basis for the current category. The ten observations were collected over the reporting period, ensuring representation of the local atmosphere. No PM10 data are available at this time.

Data is shown via OpenAQ. The information reflects the conditions at the time of measurement and does not include forecasts. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

The Anacortes air‑quality feed pulls data from two monitoring sites, providing twelve recent rows of observations. Ten of those rows were recorded within the last 30 days, while the remaining two are older, so the overall picture is fairly current but includes a small amount of legacy data. The most recent timestamps for most pollutants are from 2026‑02‑07 22:00 UTC, giving a snapshot of conditions that is only a few weeks old; the exception is PM10, whose latest entry dates to 2025‑01‑13 23:00 UTC, indicating that this metric is not refreshed as frequently.

The dataset includes six measured pollutants. PM1 values sit between about 1.07 and 1.12 µg/m³, with a median of 1.09 µg/m³, showing a very tight spread. PM2.5 ranges from roughly 1.47 to 1.94 µg/m³, median 1.71 µg/m³, also indicating limited variability across the sampled period. PM10, recorded at the second site, varies from 4.40 to 5.09 µg/m³ with a median of 4.74 µg/m³, but its older timestamp means the figure may not reflect the most recent conditions. Relative humidity is measured between 61.38 % and 66.79 %, median 64.08 %, while temperature hovers from 12.33 °C to 12.42 °C, median 12.38 °C, both suggesting a fairly stable micro‑climate during the sampling window. The particle count (UM003) shows a broader range, from 298.64 to 350.40 particles/cm³, median 324.52, highlighting more fluctuation in aerosol concentration than the mass‑based metrics.

Overall, the data give a concise view of Anacortes’ air quality, with most pollutants captured recently and displaying narrow, consistent ranges, while PM10’s older update and the wider spread in particle counts point to areas where additional or more frequent sampling could improve the completeness of the picture.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

The dataset for Anacortes, Washington includes ten valid measurements and is updated within 30 days. The most recent data were recorded on 2026-02-07 at 22:00 UTC. This snapshot reflects conditions at the time of sampling, but air quality can vary by location and time within the city. Users should consider these factors when interpreting the information presented.

OpenAQ station rows