Open Data Insight of the Day

In February 2026, air quality at the NBCN monitoring station in Binningen was assessed using the Kurzzeit-Belastungs-Index (KBI), a composite index that combines ozone, nitrogen dioxide, and particulate matter levels into a single measure of short-term exposure. The month recorded 12 days with KBI 1, indicating good air quality, and 16 days with KBI 2, reflecting moderate pollution. No days reached KBI 3 or higher, meaning there were no periods of marked, significant, high, or very high pollution. The mean concentrations were 43.9 µg/m³ for ozone, 15.9 µg/m³ for nitrogen dioxide, and 8.7 µg/m³ for particulate matter (PM10). The maximum values reached 94.6 µg/m³ for ozone, 50.9 µg/m³ for nitrogen dioxide, and 32.9 µg/m³ for PM10. All values are detailed in Table 1, with regulatory thresholds provided in Table 3.

Compared to previous Februarys since 2019, air pollution in February 2026 was generally lower or similar. The number of days with KBI 1 ranked 2nd highest among the eight years, while days with KBI 2 were near the middle of the historical range. For maximum concentrations, nitrogen dioxide ranked 7th, ozone ranked 3rd, and particulate matter ranked 8th, indicating relatively low peak levels, especially for PM10. The monthly average and maximum values for February are reported in Table 2 and visualized in Figures 1 to 3.