A street sweeper cleans winter sanding gravel from the pavement in Kruununhaka, Helsinki. / Lehtikuva
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Street dust has deteriorated air quality across the Helsinki metropolitan area, according to the Helsinki Region Environmental Services Authority (HSY).
Air quality has been recorded as poor in several locations, particularly near busy roads and main traffic routes. High concentrations of street dust have been visible in dense clouds, especially in central areas with heavy vehicle use.
Anu Kousa, HSY’s air protection specialist, said in a statement that street dust levels this week have significantly exceeded normal readings.
“Dust levels have in some cases been more than ten times higher than typical concentrations,” Kousa said.
Street dust consists mainly of fine asphalt particles and sanding gravel, which accumulate during winter months. The particles are released into the air when streets dry out in spring. Weather conditions directly affect dust dispersion. Rain can temporarily reduce airborne dust, while dry conditions increase exposure.
The highest levels have been measured along major transport corridors and city streets with constant vehicle traffic. Spikes have also been observed in surrounding areas of Uusimaa.
Health authorities report an increase in symptoms among those exposed outdoors. These include nasal irritation, coughing and eye discomfort. People with asthma, cardiovascular disease, or chronic respiratory conditions face greater risks. Young children and elderly people are also sensitive to elevated dust levels.
HSY recommends avoiding outdoor exercise near busy streets during dusty periods. Short distances can reduce exposure.
“Air is cleaner even one block away from a congested street,” Kousa said.
To control dust levels, HSY urges municipalities and property owners to remove sanding gravel using damp methods. Wet removal prevents particles from lifting into the air.
“Removing sand when it is dry raises visible dust clouds,” Kousa said.
Cities across the region are currently carrying out spring street cleaning. This process removes sand and debris left by winter maintenance.
HSY prohibits the use of leaf blowers for sand removal in the Helsinki region. These devices push large amounts of particles into the air. Sweeping sand onto already cleaned roads is also banned.
In addition to municipal efforts, residents are encouraged to adopt specific practices to reduce dust exposure and emissions.
Drivers are advised to avoid unnecessary car use and switch from winter tyres to summer tyres as soon as weather permits. Tyres with metal studs increase asphalt wear, producing fine particles that become airborne in spring.
HSY also recommends keeping windows shut during dusty periods and using effective air filters in homes. Filters should be checked and replaced regularly.
Other suggestions include drying laundry indoors and monitoring current air quality levels online. The HSY air quality map is available at hsy.fi/ilmanlaatu.
Poor air quality is expected to continue into the weekend, depending on changes in weather. Residents are advised to adjust their movements accordingly.
HT
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Source: www.helsinkitimes.fi
