The early summer blue-green algae situation is calm in inland waters, coastal areas, and offshore areas. Photo: Riku Lumiaro / Syke
- Next Article Two dead as Midsummer traffic eases across Finland
This week, Finland saw a subdued start to the blue-green algae (cyanobacteria) season, with only modest blooms in inland and coastal waters, and none offshore, according to the Finnish Environment Institute (Syke).
Over the past week, only two inland observation sites recorded abundant algae levels, while around 15 other sites reported moderate occurrences. Most sightings occurred in Southern Finland, with a few in Central Finland and a single sighting in southern Lapland. Syke maintains 246 active inland monitoring stations.
Coastal waters showed even fewer blooms than is typical for this time of year. Only two of Syke’s 69 coastal monitoring stations reported minor algae presence, with no heavy blooms observed .
Offshore readings remain normal. Satellite imagery was limited this week due to unsettled weather, but small traces of algae were detected in the Gulf of Finland. No algae were found in the Bothnian Sea, Archipelago Sea, or Åland Sea.
Cyanobacteria can produce toxins harmful to humans and animals. Bathing in contaminated water carries risks, especially for children and pets. Symptoms may appear from skin contact or ingestion. As a precaution, water with visible algae should not be used in saunas, for washing, or for irrigation. Health officials urge medical advice or veterinary help if poisoning is suspected, and municipal beach monitoring remains active.
In addition to official monitoring, public reports play a key role in tracking algae. This week, 38 observations were submitted by citizens via online platforms such as Järvi-meriwiki and Vesi.fi.
Syke’s cyanobacterial programme spans about 400 permanent sites across inland, coastal, and archipelago waters, with data and Waterinfo.fi, which show current algae maps using citizen and satellite data.
Although the season has started calmly, factors like warm weather and light winds could heighten algae growth in the coming weeks. Syke will continue weekly surveys until early August, with ongoing monitoring through September.
HT
- Next Article Two dead as Midsummer traffic eases across Finland
Source: www.helsinkitimes.fi
