Air quality in San Fernando, California, United States of America today
Mr. Duck’s Air Quality Score
Moderate air today for San Fernando, Andalusia, Spain
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in San Fernando today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 9.27 and a PM10 reference value of 6.24, based on six valid observations collected via OpenAQ.
These values reflect the current assessment for the city 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 dataset for San Fernando includes five rows of observations from a single monitoring site, identified as San Fernando MS (8358). Five pollutants are recorded: PM1, PM10, PM2.5, relative humidity and temperature. For each pollutant the available values are identical across the row set – the minimum, median and maximum are all the same – indicating that only one measurement per parameter is currently stored.
The most recent data point in the collection is the PM2.5 reading from 2026‑02‑10 23:01 UTC; all other pollutants were last updated on 2024‑04‑24 02:05 UTC. This means that, apart from fine particulate matter, the remaining measurements are over a year old, and no newer observations have been added since the April 2024 update. Because there is only one monitoring location, the spatial coverage for San Fernando is limited to that single point, so conditions elsewhere in the city may differ from what these numbers show.
Specific figures illustrate the narrow range of the dataset: PM1 registers at 4.19 µg/m³, PM10 at 9.5 µg/m³ and PM2.5 at 9.27 µg/m³; relative humidity is recorded as 54.45 % and temperature as 18.76 °C. Since each pollutant has a single reported value, there is no spread to describe variability over time or across locations. The overall picture is therefore one of sparse, dated data for most parameters, with only the PM2.5 measurement reflecting a more recent observation. Users should keep in mind that air quality can change throughout the day and between neighborhoods, and the limited, older dataset may not capture those fluctuations.
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 San Fernando reflects six valid measurements and is marked as Updated within 30 days, with the most recent update recorded at 2026‑02‑10T23:01:42+00:00. This snapshot provides a current view of ambient conditions but note that air quality can vary by location and time within the city, so values may differ across neighborhoods or during different periods of the day.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| San Fernando MS (8358) | pm1 | 4.19 | µg/m³ | 2024-04-24 02:05 UTC |
| San Fernando MS (8358) | pm10 | 9.5 | µg/m³ | 2024-04-24 02:05 UTC |
| San Fernando MS (8358) | pm25 | 9.27 | µg/m³ | 2026-02-10 23:01 UTC |
| San Fernando MS (8358) | relativehumidity | 54.45 | % | 2024-04-24 02:05 UTC |
| San Fernando MS (8358) | temperature | 18.76 | c | 2024-04-24 02:05 UTC |