Katupölyn

Katupölyn is a Finnish term that translates to "road dust" or "street dust." It refers to the fine particulate matter that accumulates on roads and urban surfaces, primarily composed of soil particles, tire wear debris, brake wear particles, and exhaust emissions from vehicles. This dust is often stirred up by passing traffic, wind, and pedestrian activity, becoming suspended in the air as airborne particulate matter, commonly known as PM2.5 and PM10.

The composition of katupölyn can vary significantly depending on the location, season, and local environmental factors. In urban areas, it frequently contains a complex mixture of organic and inorganic substances, including heavy metals, polycyclic aromatic hydrocarbons (PAHs), and microplastics. These components originate from various sources, such as vehicle exhaust, tire abrasion, road surface wear, and the breakdown of asphalt and other road materials.

Katupölyn has important implications for public health and the environment. Airborne road dust is a significant contributor to air pollution in cities, and its inhalation can lead to respiratory and cardiovascular problems, particularly for vulnerable populations. Furthermore, when it rains, katupölyn can be washed into storm drains and eventually enter waterways, potentially contaminating aquatic ecosystems and affecting water quality. Efforts to mitigate the impact of katupölyn include regular street cleaning, dust suppression measures, and promoting cleaner transportation technologies.