Airborne concentrations of dust have risen in Lahti this week because of the sand and asphalt particles. Sanding of streets during winter causes springtime air quality to deteriorate when the streets dry out. The dust is airborne especially where traffic grinds the sand into dust.
In Lahti, the removal of sand is carried out by the city in most areas. In the city centre, the housing companies are responsible for the maintenance and sand removal of some of the sidewalks.
The harms caused by dust are significantly reduced by accurately timed street maintenance. In the areas which the city is responsible for, the sand removal has begun. A large-scale and effective street cleaning operation called Sandstorm was carried out in the city centre of Lahti this weekend to minimise the period of bad springtime air quality.
The sand removal will take approximately five weeks. This timetable requires that work will be done in two shifts and also during the weekends. Dust binding is made by watering the main traffic lanes and bus stops with 5% calcium chloride solution. If necessary, the solution is also used on cycle lanes.
Extensive air quality monitoring
Lahti monitors air quality at five stationary automatic measuring stations. In addition to automatic measuring stations, Lahti has had a mobile station since 2015. Thorough monitoring ensures that immediate action is taken and residents are informed by an SMS warning service if air quality deteriorates.
For more information, please contact:
Project Engineer Jani Tuhkanen, tel. +358 50 5594 102
Environmental Engineer Kaarina Kähäri, tel. +358 50 5391 695