Last updated 27/09/2019 - 14:13
The proportion of periods of good air quality decreased in Tikkurila and Leppävaara
In April–June, the proportion of periods of good air quality decreased in Tikkurila and Leppävaara in comparison to the corresponding period in the previous year. At the same time, the proportion of periods of satisfactory air quality increased. There were more periods of both good and fair air quality at the Mannerheimintie measuring point than in the previous year. The air quality in April, in particular, was worse in the Helsinki Metropolitan Area than before.
In April–June, the average proportions of periods of good air quality totalled 55 per cent in Tikkurila, 54 per cent in Leppävaara and 38 per cent on Mannerheimintie. The air quality was mainly satisfactory during other periods.
At the Mannerheimintie measuring point, air quality has mostly been satisfactory in recent years, but in 2018, the proportion of good air quality surpassed the proportion of satisfactory air quality. In Leppävaara and Tikkurila, the air quality has been good for most of the time since 2015. Street dust decreases air quality especially in the spring.