Air quality in St Helens, England, United Kingdom today
Mr. Duck’s Air Quality Score
Good air today for St Helens, England, United Kingdom
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 Helens today is classified as Good. The primary pollutant measured is PM10, and the reference value for this particle size is 9.0 micrograms per cubic metre. Two valid measurements were recorded to support this assessment, and the data are shown via OpenAQ.
Overall, conditions meet the criteria for a Good rating based on the available PM10 information. 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 record for St Helens draws on OpenAQ data that currently includes two pollutant measurements – nitrogen dioxide (NO₂) and particulate matter up to 10 µm in diameter (PM₁₀). Both values come from a single monitoring site, identified as St Helens Linkway, so the dataset reflects conditions at one location rather than city‑wide coverage. In total there are two rows of data: one for NO₂ and one for PM₁₀.
The most recent observations are fairly fresh. The NO₂ reading was logged on 2026‑02‑10 at 14:00 UTC, while the PM₁₀ measurement was recorded later that same day at 20:00 UTC. Both timestamps fall within the “updated within 7 days” freshness category, indicating that the data are current as of early February 2026.
For each pollutant the reported statistics show no variation across the available record. NO₂ is consistently measured at 19.0 µg/m³ – the minimum, median and maximum values are all identical, and the 10th‑percentile and 90th‑percentile figures match this single reading. Likewise, PM₁₀ registers a steady 9.0 µg/m³ across its entire set of statistics. Because only one value exists for each pollutant, there is no spread to describe and the typical concentration equals the sole observed figure.
Overall, the dataset provides a snapshot rather than a detailed picture: it covers just one monitoring point, offers two rows of data, and presents single‑value summaries with no historical depth. Consequently, while the numbers give an immediate sense of the measured concentrations at St Helens Linkway on 10 February 2026, they do not capture spatial or temporal variations that may occur elsewhere in the town or on other days.
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 Helens is based on two valid measurements and was refreshed within the past three days, with the latest update recorded at 2026‑02‑10T20:00:00+00:00. This snapshot reflects conditions at a specific time and place; air quality can differ across neighbourhoods 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 |
|---|---|---|---|---|
| St Helens Linkway | no2 | 19.0 | µg/m³ | 2026-02-10 14:00 UTC |
| St Helens Linkway | pm10 | 9.0 | µg/m³ | 2026-02-10 20:00 UTC |