Poor air quality in the KMC is not uncommon in the winter, as cold temperatures, low winds and temperature inversions can trap pollutants close to the ground. (Mark Sulaica/U.S. Air Force)

Air quality in parts of the Kaiserslautern Military Community reached unhealthy levels on Monday, according to data from a local air-monitoring station, prompting concerns for some residents, particularly those with respiratory conditions.

The air quality monitoring website AQICN, which aggregates data from government and certified sensors, showed an Air Quality Index of about 150 or higher in downtown Kaiserslautern on Monday morning, placing it in the “unhealthy” range. 

The elevated readings were driven primarily by PM2.5, fine particulate matter that can penetrate deep into the lungs, the website said.

At the level recorded, health experts warn that everyone may begin to experience health effects, while children, older adults and people with asthma, heart disease or other lung conditions face increased risks.

Residents are advised to limit prolonged outdoor activity, especially strenuous exercise.

Air quality can vary significantly across the KMC and not all monitoring services showed the same severity. The air-quality tracking site IQAir reported Kaiserslautern’s overall air quality as “moderate” on Monday, based on readings from different sensors and averaging methods.

Poor air quality in the KMC is not uncommon in the winter, as cold temperatures, low winds and temperature inversions can trap pollutants close to the ground, while emissions from vehicle traffic and residential heating add to particulate levels.