Air quality in Southampton, England, United Kingdom today

Mr. Duck’s Air Quality Score

Moderate air today for Southampton, England, United Kingdom

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Southampton today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 value of 11.49 µg/m³ and a PM10 level of 7.0 µg/m³, based on 13 valid observations collected 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

Southampton’s OpenAQ feed currently provides data for nine measured variables – nitrogen dioxide (NO₂), ozone (O₃), particulate matter of three size fractions (PM1, PM2.5 and PM10), sulphur dioxide (SO₂) is listed in the source but has no recent values, relative humidity, temperature and particle count (UM003). The dataset comprises 22 individual rows drawn from five monitoring sites across the city, giving a modest spatial snapshot of air quality conditions.

The most up‑to‑date observations were recorded on 2026‑02‑10 at 20:00 UTC for NO₂, PM10 and O₃ at the Southampton Centre – UKA00235 site, while the remaining variables (PM2.5, PM1, relative humidity, temperature and UM003) were last refreshed on 2026‑02‑10 at 21:00 UTC at the Bassett location. All timestamps fall within the past seven days, so the data are considered fresh overall, although only a single station contributes to O₃ and NO₂ readings, whereas three stations supply PM2.5 values and two provide the other metrics.

Across the available pollutants the measured concentrations show a fairly narrow spread. For example, PM10 values range from 6 µg/m³ to about 27 µg/m³ with a median of 20 µg/m³; PM2.5 varies between 4 µg/m³ and roughly 25 µg/m³, centred on a median of 7.7 µg/m³; NO₂ is recorded between 21 µg/m³ and 39 µg/m³ with a typical value of 34 µg/m³. Relative humidity at Bassett spans 65 % to 77 %, while temperature ranges from 8 °C to 13 °C, reflecting the cooler early‑year conditions. Particle count (UM003) is between about 1 400 and 2 200 particles per cm³, with a median near 1 800.

Because only a handful of stations contribute data for each pollutant, especially for O₃ and NO₂ which rely on a single site, the picture presented here captures conditions at specific points rather than city‑wide averages. Users should keep in mind that air quality can differ noticeably across neighbourhoods and over short time periods, so these figures represent a snapshot of recent measurements rather than a comprehensive assessment of Southampton’s overall atmospheric state.

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 are based on 13 valid measurements and have been updated within 3 days, with the most recent reading recorded at 2026‑02‑10T21:00:00+00:00. This snapshot reflects conditions at specific monitoring points and times; air quality can vary across different locations and moments throughout Southampton.

OpenAQ station rows