Air quality in Anaheim, California, United States of America today

Mr. Duck’s Air Quality Score

Moderate air today for Anaheim, California, 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 Anaheim today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 9.6 and a PM10 reference value of 20.0, based on six valid observations collected via OpenAQ.

Data reflect the current conditions without additional interpretation. 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 OpenAQ feed for Anaheim includes data on carbon monoxide (CO), nitric oxide (NO), nitrogen dioxide (NO2), total nitrogen oxides (NOX), ozone (O3), particulate matter of 1 µm (PM1), 2.5 µm (PM2.5) and 10 µm (PM10) diameter, as well as relative humidity, temperature and a miscellaneous metric labeled UM003. The dataset comprises twelve rows from two monitoring stations, giving a modest snapshot of the city’s air quality.

The most recent measurements are from 2026‑02‑11 00:00 UTC for PM2.5 (9.6 µg/m³), NO (0.0002 ppm), NO2 (0.0042 ppm), NOX (0.0044 ppm), O3 (0.035 ppm), PM10 (20.0 µg/m³) and PM1 (0.86 µg/m³). CO is older, last recorded on 2026‑01‑08 18:00 UTC at 0.5 ppm. Across the pollutants that have multiple observations, the median values are very close to the minimums, indicating little variation in the limited sample: PM2.5 ranges from about 3.4 to 9.6 µg/m³ with a median of 6.5 µg/m³; CO is a single value of 0.5 ppm; NO stays constant at 0.0002 ppm; NO2, NOX and O3 each appear only once at their listed levels; PM10 is consistently 20 µg/m³; PM1 shows a solitary reading of 0.86 µg/m³. This narrow spread suggests that the available data capture only a snapshot rather than a full daily or seasonal range.

Because most pollutants have just one recent entry and CO’s latest record is over a month older, the overall coverage is uneven and many rows are dated. Consequently, while the dataset confirms that these specific contaminants are being monitored in Anaheim, it does not provide a comprehensive picture of how concentrations change across different neighborhoods or times of day. Users should keep in mind that conditions can vary widely beyond what these limited, occasionally outdated measurements reveal.

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 data shown reflects six valid measurements and was Updated today (last refreshed on 2026‑02‑11T00:00:00+00:00). These values provide a current snapshot of ambient conditions across Anaheim, but air quality can vary by location and time within the city, so individual neighborhoods may experience different levels than those reported here.

OpenAQ station rows