Air quality in Sydney, Nova Scotia, Canada today
Mr. Duck’s Air Quality Score
Moderate air today for Sydney, Nova Scotia, Canada
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Sydney, Nova Scotia is classified as Moderate today. The primary pollutant identified is PM2.5 (fine particles).
Measurements from OpenAQ show a PM2.5 concentration of 30.24 µg/m³ based on 40 valid observations. 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 Sydney monitoring network supplies data for seven key pollutants: carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), ozone (O₃), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). All eight rows in the dataset come from a single measurement station, so each pollutant is represented by one recent reading rather than a city‑wide grid.
The most up‑to‑date observations were recorded on 2026-02-10 22:00 UTC for every pollutant, meaning the freshest values are less than two weeks old. CO, NO and NOX each have a single reported value of 0.1 ppm, 0.0005 ppm and 0.0016 ppm respectively; these three gases show no variation because only one measurement exists. In contrast, O₃ spans a narrow range from 0.040 ppm to 0.042 ppm with a median of 0.041 ppm, while NO₂ is constant at 0.001 ppm across its minimum, median and maximum. PM2.5 values are also tightly clustered, ranging from 5.6 µg/m³ to 6.0 µg/m³ with a median of 5.8 µg/m³. SO₂ shows the widest relative spread, moving from an undetectable minimum of 0 ppm up to a maximum of 0.0003 ppm, though its median sits at 0.00015 ppm.
Because the dataset consists of only one station, coverage across the city is limited and does not capture spatial differences that may exist between neighborhoods or over longer periods. The uniform freshness of the timestamps indicates recent reporting, but the lack of multiple rows means any single reading could be influenced by local conditions at the sensor location rather than representing broader urban air quality.
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 Sydney, Nova Scotia reflects 40 valid measurements and is marked as Updated within 3 days, with the most recent update recorded at 2026‑02‑10T22:00:00+00:00. This snapshot provides a current view of ambient conditions but 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 |
|---|---|---|---|---|
| SYDNEY | no2 | 0.001 | ppm | 2022-04-08 14:00 UTC |
| SYDNEY | o3 | 0.04 | ppm | 2022-04-08 14:00 UTC |
| SYDNEY | pm25 | 6.0 | µg/m³ | 2022-04-08 14:00 UTC |
| SYDNEY | so2 | 0.0 | ppm | 2022-04-08 14:00 UTC |
| SYDNEY | co | 0.1 | ppm | 2026-02-10 22:00 UTC |
| SYDNEY | no | 0.0005 | ppm | 2026-02-10 22:00 UTC |
| SYDNEY | no2 | 0.001 | ppm | 2026-02-10 22:00 UTC |
| SYDNEY | nox | 0.0016 | ppm | 2026-02-10 22:00 UTC |
| SYDNEY | o3 | 0.042 | ppm | 2026-02-10 22:00 UTC |
| SYDNEY | pm25 | 5.6 | µg/m³ | 2026-02-10 22:00 UTC |
| SYDNEY | so2 | 0.0003 | ppm | 2026-02-10 22:00 UTC |