Air quality in Colusa, California, United States of America today
Mr. Duck’s Air Quality Score
Moderate air today for Colusa, 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 Colusa today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 value of 10.5 µg/m³ and a PM10 value of 18.0 µg/m³, based on three valid observations reported through OpenAQ.
These figures reflect the current conditions 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 air‑quality record for Colusa draws from a single OpenAQ monitoring site – Sunrise Blvd – and supplies data on three measured pollutants: ozone (O₃), particulate matter up to 10 µm (PM10) and fine particulate matter up to 2.5 µm (PM2.5). All six recent observations in the dataset come from this one station, so spatial coverage is limited to that location.
The most recent readings were all recorded on 2026‑02‑11 at 00:00 UTC, which places them well within a seven‑day freshness window. For ozone, the values range narrowly from 0.029 ppm to 0.030 ppm, with a median of 0.0295 ppm and the 10th–90th percentile band spanning 0.0291–0.0299 ppm. PM10 shows a broader spread: measurements vary between 18.0 µg/m³ and 41.0 µg/m³, the median sits at 29.5 µg/m³, and the central 80 % of observations lie from about 20.3 to 38.7 µg/m³. PM2.5 is the most tightly clustered, ranging only from 10.5 µg/m³ to 11.0 µg/m³, with a median of 10.75 µg/m³ and a 10th–90th percentile range of 10.55–10.95 µg/m³.
Because the dataset contains just one reporting location, it cannot capture variations that might exist across different neighborhoods or micro‑environments in Colusa. Nonetheless, the data are recent and provide a clear snapshot of typical concentrations at Sunrise Blvd: ozone is consistently low, PM10 exhibits moderate variability, and fine particles remain narrowly bounded around 11 µg/m³. Users should keep in mind that conditions elsewhere in the city may differ from this single point of measurement.
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 Colusa reflects three valid measurements and was updated today (2026‑02‑11T00:00:00+00:00). These values represent the most recent readings available from the monitoring network, but air quality can vary by location and time within the city, so conditions at any specific spot may differ from this snapshot.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Colusa - Sunrise Blv | o3 | 0.03 | ppm | 2019-04-18 18:00 UTC |
| Colusa - Sunrise Blv | pm10 | 41.0 | µg/m³ | 2019-04-18 18:00 UTC |
| Colusa - Sunrise Blv | pm25 | 11.0 | µg/m³ | 2019-04-18 18:00 UTC |
| Colusa - Sunrise Blv | o3 | 0.029 | ppm | 2026-02-11 00:00 UTC |
| Colusa - Sunrise Blv | pm10 | 18.0 | µg/m³ | 2026-02-11 00:00 UTC |
| Colusa - Sunrise Blv | pm25 | 10.5 | µg/m³ | 2026-02-11 00:00 UTC |