Air quality in Anchorage, Alaska, United States of America today

Mr. Duck’s Air Quality Score

Good air today for Anchorage, Alaska, 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 current air quality in Anchorage, Alaska is classified as Good. The primary pollutant measured is PM2.5. Recent observations show a PM2.5 concentration of 1.34 µg/m³ and a PM10 concentration of 4.0 µg/m³, based on 23 valid measurements. These values are expressed in micrograms per cubic meter and represent the average of the recent sampling period.

Data is shown via OpenAQ and reflects 23 valid observations collected across the city. The monitoring network includes multiple stations that report particulate concentrations used to calculate the category. No other pollutants exceeded the thresholds for this assessment. 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 Anchorage air‑quality feed pulls data from six monitoring sites and currently holds 28 individual rows of observations. Most of the records (24 rows) were updated within the last 30 days, while four rows are older than a month; none are from today or the past week. Every listed pollutant appears in the dataset, each with its own most recent timestamp: PM2.5, PM1, relative humidity, temperature and UM003 were last refreshed on 2026‑02‑11 00:00 UTC, PM10 and CO on 2026‑02‑10 23:00 UTC. This means that, despite the overall lag in some rows, the newest values for each pollutant are no more than two days old.

PM2.5 concentrations range from a low of 0.0195 µg/m³ to a high of 6.0 µg/m³, with a median of 0.746 µg/m³ and the 90th percentile at 5.5 µg/m³, indicating that most readings sit well below the upper end of the observed spread. PM10 shows a broader distribution, from 0.061 µg/m³ up to 9.68 µg/m³, a median of 3.0 µg/m³ and a 90th percentile of 7.41 µg/m³, suggesting occasional spikes that are not reflected in the finer PM2.5 metric. PM1 values are frequently zero; the median is 0 µg/m³, the maximum 0.517 µg/m³ and the 90th percentile 0.362 µg/m³, highlighting very low ultrafine‑particle levels in the sampled locations. Relative humidity stays within a narrow band, from 47 % to 59.3 % with a median of 48.2 %, while temperature hovers around the freezing point, ranging from –1.19 °C to 5.51 °C and a median of 0.13 °C. UM003 particle counts vary more widely, from 81.6 to 303.5 particles/cm³, median 83.1 particles/cm³, with the 90th percentile at 237.4 particles/cm³. CO is represented by a single recent measurement of 0.2 ppm at the Garden site. The dataset therefore offers recent, multi‑pollutant coverage but with uneven depth across pollutants and a modest amount of older data, meaning that conditions can differ across neighborhoods and over time.

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

This report is based on 23 valid measurements and has been updated within 30 days. The data were last refreshed on 2026-02-11T00:00:00+00:00. Air quality can vary by location and time within the city, so this snapshot may not represent conditions everywhere in Anchorage.

OpenAQ station rows