Air quality in City of Fredericton, New Brunswick, Canada today
Mr. Duck’s Air Quality Score
Good air today for City of Fredericton, New Brunswick, 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 Fredericton today is classified as Good. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 7.7 µg/m³. No PM10 value is available for this assessment.
These results are based on three valid measurements reported through OpenAQ. 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 City of Fredericton air‑quality feed includes three measured pollutants – nitrogen dioxide (NO₂), ozone (O₃) and fine particulate matter (PM₂.5). Data come from two monitoring stations, each providing a row for every pollutant, so the dataset contains six rows in total. Freshness is mixed: three of those rows have been updated within the last three days, while the remaining three are older than three days but still less than thirty days old; none are from today or unknown.
For NO₂ the most recent reading is 0.0077 ppm recorded at the Fredericton‑Needham site on 2026‑02‑10 22:00 UTC. Across the available observations the values range from a low of 0.001 ppm to a high of 0.0077 ppm, with a median of about 0.00435 ppm and the central 80 % of measurements falling between roughly 0.0017 ppm (10th percentile) and 0.0070 ppm (90th percentile). Ozone shows a tighter spread: the latest value is 0.033 ppm at the same site and time, with observations ranging from 0.033 to 0.039 ppm, a median of 0.036 ppm and the 10th–90th percentiles between 0.0336 and 0.0384 ppm. PM₂.5 is reported in micrograms per cubic metre; the newest figure is 7.7 µg/m³ from Fredericton‑Needham on 2026‑02‑10 22:00 UTC. The dataset’s PM₂.5 values vary from 3.0 to 7.7 µg/m³, median 5.35 µg/m³, with the central bulk of measurements (10th–90th percentiles) spanning 3.47 to 7.23 µg/m³.
Overall the coverage is limited to two locations, and while half of the rows are fairly recent, the other half are older than three days, meaning that city‑wide conditions may differ across neighborhoods or change between updates. The pollutant data show modest variability, especially for ozone, whereas NO₂ and PM₂.5 exhibit a broader range within the limited sample set.
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 Fredericton includes three valid measurements and was refreshed recently, with the latest update recorded on 2026‑02‑10 at 22:00 UTC; it is therefore considered “Updated within 3 days.” This snapshot reflects conditions at that specific time, but air quality can vary across different neighbourhoods and moments throughout the day.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| FREDERICTON | no2 | 0.001 | ppm | 2017-03-30 17:00 UTC |
| FREDERICTON | o3 | 0.039 | ppm | 2017-03-30 17:00 UTC |
| FREDERICTON | pm25 | 3.0 | µg/m³ | 2017-03-30 15:00 UTC |
| FREDERICTON-NEEDHAM | no2 | 0.0077 | ppm | 2026-02-10 22:00 UTC |
| FREDERICTON-NEEDHAM | o3 | 0.033 | ppm | 2026-02-10 22:00 UTC |
| FREDERICTON-NEEDHAM | pm25 | 7.7 | µg/m³ | 2026-02-10 22:00 UTC |