Air quality in Lewes, England, United Kingdom today

Mr. Duck’s Air Quality Score

Good air today for Lewes, 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 Lewes today is classified as Good. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 0.972 µg/m³ based on five valid readings collected via OpenAQ.

Overall, the data indicate that conditions meet the Good category criteria for this location. 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 Lewes air‑quality record draws on 15 sensor rows from three monitoring sites, covering nine measured variables: nitrogen dioxide (NO₂), ozone (O₃), particulate matter 1 (PM₁), PM₂·₅, PM₁₀, relative humidity, temperature, and ultrafine particle count (UM003). The most recent observations are from 2026‑02‑10 21:00 UTC for PM₁, PM₂·₅, relative humidity, temperature and UM003, showing that half of the dataset is refreshed within the past week. By contrast, NO₂ data were last updated on 2022‑01‑21 09:00 UTC, O₃ on 2021‑11‑30 12:00 UTC, and PM₁₀ on 2024‑11‑04 19:00 UTC, indicating that several key pollutants rely on older measurements.

Across the available records, concentrations span a wide range. NO₂ varies from 19.3 to 37.7 µg/m³ with a median of 28.5 µg/m³; PM₁₀ runs between 19.0 and 45.6 µg/m³ (median ≈ 32.3 µg/m³); PM₂·₅ is recorded from just under 1 to 37.4 µg/m³ (median ≈ 19.2 µg/m³). The ultrafine particle count (UM003) shows the greatest spread, from about 150 to 925 particles/cm³ (median ≈ 538), while relative humidity ranges from 41.7 % to 68.5 % (median ≈ 55 %). Temperature values are modest, between 13.66 °C and 21.31 °C with a median near 17.49 °C.

Because the dataset mixes very recent readings for some pollutants with older snapshots for others, the picture of Lewes’ air quality can differ noticeably depending on location and time of day. Users should keep in mind that conditions may vary across the town and that the freshest data are limited to a subset of the measured parameters.

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 Lewes includes five valid measurements and was refreshed recently, with the latest update recorded on 10 February 2026 at 21:00 UTC; it is therefore labelled as updated within three days. While these figures give a reliable snapshot of overall conditions, air quality can vary across different neighbourhoods and times of day within the city, so local readings may differ from this summary.

OpenAQ station rows