Air quality in St John, Jersey today
Mr. Duck’s Air Quality Score
Moderate air today for St John, Jersey
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in St John is currently classified as Moderate. The primary pollutant identified for today is PM2.5, which refers to fine particulate matter.
Measurements recorded for the day show a PM2.5 concentration of 13.35 µg/m³ based on two valid observations. Data is shown via 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 current station data listed for this city is focused on particulate matter (PM). Only PM2.5 measurements are available, coming from two monitoring rows that both report the same pollutant in micrograms per cubic metre. The most recent reading was recorded on 2026-02-10 23:00 UTC, and the dataset notes that updates have occurred within the past three days, indicating relatively fresh information for this metric.
Across the two stations, observed PM2.5 concentrations range from a low of 6.47 µg/m³ to a high of 13.35 µg/m³, with a median value of 9.91 µg/m³. The 10th percentile sits at about 7.16 µg/m³ and the 90th percentile near 12.66 µg/m³, showing that most recent measurements cluster within a modest spread. Because only PM2.5 is reported and there are just two data rows, coverage of other pollutants or finer spatial detail is limited; conditions in St John can therefore differ by location and time beyond what this snapshot captures.
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 St John reflects two valid measurements and was updated within 3 days, with the latest reading recorded at 2026‑02‑10T23:00:41+00:00. This snapshot provides a current view of air quality across the city, but conditions can differ by specific location and time of day, so values may vary locally.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Sion Village (Co-Op) | pm25 | 6.47 | µg/m³ | 2026-02-10 22:59 UTC |
| St John's Village | pm25 | 13.35 | µg/m³ | 2026-02-10 23:00 UTC |