Air Quality Report for Basel on 2025-06-25

1. Introductory Summary

The air quality in Basel on June 25, 2025, was characterized by elevated ozone (O₃) levels, which were notably high compared to historical data. The mean concentration of O₃ was above average, and the maximum value recorded was significantly elevated. Other pollutants such as nitrogen dioxide (NO₂), particulate matter (PM2.5), and elemental carbon (EC) were within typical ranges for this time of year, with no unusual spikes or dips observed.

2. Elevated Pollutant Table

3. Contextual Interpretation

• Ozone (O₃): The mean O₃ level was 92.66 µg/m³, which is higher than the average for the last 30 days (74.9 µg/m³) and the current season this year (76.54 µg/m³). The maximum value of 166.5 µg/m³ was above the 90th percentile, indicating an unusually high level for this time of year.

• Nitrogen Dioxide (NO₂): The mean NO₂ concentration was 10.44 µg/m³, which is slightly above the average for the last 30 days (7.28 µg/m³) and the current season (7.88 µg/m³). However, these values are within typical ranges and do not indicate significant pollution events.

• Particulate Matter (PM2.5): The mean PM2.5 level was 6.76 µg/m³, below the average for the last 30 days (9.71 µg/m³) and the current season (10.8 µg/m³), suggesting relatively low particulate pollution.

• Condensation Particle Counter (CPC): The mean CPC value was 10688.82 particles/cm³, which is higher than the average for the last 30 days (6906.19 particles/cm³) and the current season (7182.72 particles/cm³), indicating an increase in ultrafine particles.

• Elemental Carbon (EC): The mean EC concentration was 0.22 µg/m³, slightly below the average for the last 30 days (0.24 µg/m³) and the current season (0.26 µg/m³), indicating typical levels.

4. Notable Events

The notable event for the day was the elevated O₃ levels, which could be attributed to weather conditions such as high solar radiation (mean of 337.54 W/m²) and possibly stagnant air conditions that favor ozone formation. The maximum radiation recorded was 897.3 W/m², which is conducive to photochemical reactions leading to ozone production.

Disclaimer: This content has been generated by an AI algorithm.