Air quality in Atascadero, California, United States of America today
Mr. Duck’s Air Quality Score
Moderate air today for Atascadero, California, United States of America
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Atascadero today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 10.0 and a PM10 reference value of 49.0, based on five valid observations reported through OpenAQ.
These values reflect the current monitoring results for the city. 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 Atascadero air‑quality feed contains six individual pollutant measurements, each coming from a single reporting row. All six rows have been refreshed within the past week, with the most recent update recorded on 2026‑02‑10 23:00 UTC, so the dataset reflects very current conditions for this location.
The available pollutants are nitrogen monoxide (NO) at –0.0008 ppm, nitrogen dioxide (NO₂) at 0.0016 ppm, combined nitrogen oxides (NOX) at 0.0007 ppm, ozone (O₃) at 0.04 ppm, particulate matter ≤10 µm (PM10) at 49.0 µg/m³, and fine particulate matter ≤2.5 µm (PM2.5) at 10.0 µg/m³. For each pollutant the minimum, median and maximum values are identical, indicating that only a single observation is present for each metric rather than a range of readings over time.
Because every pollutant is represented by exactly one recent row, there is no spread or variability to describe across the dataset; the reported figures are both the typical (median) and extreme (minimum/maximum) values. This uniformity also means that coverage is limited to a single monitoring point in Atascadero, so while the data are fresh, they capture conditions at only one spot and may not reflect spatial differences within the broader city area.
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 for Atascadero reflects five valid measurements and is updated within three days, with the most recent reading recorded on 2026‑02‑10 at 23:00 UTC. This snapshot represents conditions at a specific time and location; air quality can vary across different parts of the city and change throughout the day.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Atascadero | no2 | 0.0016 | ppm | 2026-02-10 23:00 UTC |
| Atascadero | nox | 0.0007 | ppm | 2026-02-10 23:00 UTC |
| Atascadero | o3 | 0.04 | ppm | 2026-02-10 23:00 UTC |
| Atascadero | pm10 | 49.0 | µg/m³ | 2026-02-10 23:00 UTC |
| Atascadero | pm25 | 10.0 | µg/m³ | 2026-02-10 23:00 UTC |