In July 2026, two monitoring stations provided noise measurements: Feldbergstrasse and Grenzacherstrasse. At Feldbergstrasse, the average noise level was 68.7 dB and the maximum reached 93.2 dB. At Grenzacherstrasse, the average was 63.2 dB with a maximum of 90.5 dB. The highest noise level at Feldbergstrasse in July 2026 was 90.3 dB, recorded on July 8 between 15:00 and 17:59. The quietest period at Feldbergstrasse during the month was between 00:00 and 02:59, with an average of 61.9 dB and a maximum of 65.7 dB.

Looking at historical data for the same month since 2020, Feldbergstrasse has typically averaged between 68.5 and 71.0 dB, with maximum values between 87.9 and 90.8 dB. The July 2026 average of 68.7 dB is therefore consistent with past years, while the maximum of 93.2 dB is slightly higher than the previous all-time July maximum of 90.8 dB from 2025. Grenzacherstrasse shows more variation across years, with averages ranging from 24.1 dB in 2025 to 67.9 dB in 2022. The July 2026 average of 63.2 dB is within that range but lower than the 2020–2023 period, when averages were between 65.3 and 67.9 dB. The maximum of 90.5 dB in July 2026 is higher than any previous July maximum at Grenzacherstrasse, which peaked at 86.0 dB in 2020.

Since 2020, the all-time statistics at Feldbergstrasse show an average of 68.7 dB, a maximum of 93.2 dB, and a 99th percentile of 88.2 dB. The large gap between the maximum and the 99th percentile indicates that the highest values are rare outliers. At Grenzacherstrasse, the all-time average is 63.2 dB, the maximum is 90.5 dB, and the 99th percentile is 80.5 dB, also suggesting occasional extreme events. The all-time lowest noise level at Feldbergstrasse is not directly provided in the data, but the lowest average by time of day since 2020 is 62.8 dB during the 00:00–02:59 period.

The decibel scale is logarithmic, meaning a 10 dB increase corresponds to a 10-fold increase in sound intensity. For comparison, a quiet room is around 30 dB, normal conversation is about 50–60 dB, and street traffic from close by can reach 70–80 dB. Average noise levels at both stations in July 2026 were near or above the level of nearby street traffic, which is considered very loud for continuous exposure.

For readers interested in more details on noise monitoring, additional sources are available in the footer of the full report.