Air quality in Essa, Ontario, Canada today
Mr. Duck’s Air Quality Score
Moderate air today for Essa, Ontario, 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 Essa today falls into the Moderate category according to the latest assessment. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 17.0 µg/m³. Data for PM10 are not available, and three valid measurements were used to determine this rating.
These values are presented through OpenAQ data sources. 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 feed for Essa pulls data from two monitoring stations that report on ozone (O₃) and fine particulate matter (PM2.5). Both pollutants have a single recent reading recorded at the same time – 2026‑02‑10 22:00 UTC – and each entry is flagged as having been updated within the past three days, so the information reflects conditions from just a few days ago.
For PM2.5 the dataset shows a minimum value of 11.13 µg/m³, a median of about 14.07 µg/m³ and a maximum of 17.0 µg/m³. The 10th percentile sits at roughly 11.72 µg/m³ while the 90th percentile reaches 16.41 µg/m³, indicating that most recent measurements cluster in a relatively narrow band between low‑mid teens and just under 17 µg/m³. Ozone, by contrast, is represented by a single constant value of 0.035 ppm across its minimum, median, maximum and percentile figures, showing no observed variation among the available rows.
Because only two station rows contribute data, coverage across the city is limited; there are no older or unknown‑timestamp entries in this snapshot. The uniform freshness of both pollutants suggests that, at the moment, the dataset offers a concise but narrow view of Essa’s air quality, captured from a single recent time slice rather than a broader temporal spread. Consequently, while the numbers give a clear picture of current PM2.5 levels and ozone concentration, they do not capture day‑to‑day fluctuations or spatial differences that may exist elsewhere in the city.
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 data for Essa reflects three valid measurements and was updated within 3 days, with the latest reading recorded on 2026‑02‑10 at 22:00 UTC. This snapshot provides a brief overview of ambient conditions but air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment within the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Egbert | o3 | 0.035 | ppm | 2026-02-10 22:00 UTC |
| Egbert | pm25 | 17.0 | µg/m³ | 2026-02-10 22:00 UTC |
| NASA GSFC Rutgers Calib. N15 | pm25 | 11.13 | µg/m³ | 2026-02-10 21:57 UTC |