Air quality in Castlegar, British Columbia, Canada today
Mr. Duck’s Air Quality Score
Good air today for Castlegar, British Columbia, Canada
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality today in Castlegar is rated as Good. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 4.7 µg/m³ and a PM10 reference value of 22.0 µg/m³, based on six valid observations collected via OpenAQ.
These values indicate that the current atmospheric conditions meet the Good category criteria for Castlegar. 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 Castlegar air‑quality feed draws from a single monitoring location – the Zinio Park sensor – and currently provides six measured pollutants: nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM₁₀), particulate matter ≤2.5 µm (PM₂.₅) and sulfur dioxide (SO₂). All of the most recent observations were recorded on 2026‑02‑10 at 22:00 UTC, so the dataset is fresh within the last three days for every pollutant.
Across the six compounds the values are identical for each metric because only one row exists. NO registers a concentration of 0.0007 ppm, while NO₂ measures 0.0024 ppm and SO₂ shows 0.0022 ppm; O₃ is reported at 0.019 ppm. The particulate suite records PM₁₀ at 22.0 µg/m³ and PM₂.₅ at 4.7 µg/m³. Because there is a single data point, the minimum, median, maximum, 10th percentile and 90th percentile are all the same for each pollutant.
This limited coverage means that spatial variation within Castlegar cannot be captured – conditions may differ in other neighbourhoods or at different times of day. The uniform timestamp indicates that the latest snapshot is current, but with only one station the dataset does not provide a range of values to illustrate variability over time. Consequently, while the listed pollutants are all represented and the data are up‑to‑date, the picture of air quality in Castlegar remains constrained to this single location and moment.
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 current dataset for Castlegar includes six valid measurements and was refreshed recently, with the latest update recorded on 2026‑02‑10 at 22:00 UTC; it is considered “Updated within 3 days.” This snapshot reflects conditions at the time of collection, but air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Castlegar Zinio Park | no | 0.0007 | ppm | 2026-02-10 22:00 UTC |
| Castlegar Zinio Park | no2 | 0.0024 | ppm | 2026-02-10 22:00 UTC |
| Castlegar Zinio Park | o3 | 0.019 | ppm | 2026-02-10 22:00 UTC |
| Castlegar Zinio Park | pm10 | 22.0 | µg/m³ | 2026-02-10 22:00 UTC |
| Castlegar Zinio Park | pm25 | 4.7 | µg/m³ | 2026-02-10 22:00 UTC |
| Castlegar Zinio Park | so2 | 0.0022 | ppm | 2026-02-10 22:00 UTC |