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8.8.2025Hydrological situation

The blue-green algae situation has remained calm

31.7.2025Hydrological situation

Blue-green algae observations have decreased this week

24.7.2025Hydrological situation

The blue-green algae situation remains similar in many areas, while observations have increased in open sea areas

17.7.2025Hydrological situation

Warm weather has increased blue-green algae observations across the country

10.7.2025Hydrological situation

Mid-summer blue-green algae situation remains moderate in most parts of the country

3.7.2025Hydrological situation

The number of blue-green algae observations has slightly increased in inland waters, along the coast, and in the open sea areas of the Gulf of Finland

26.6.2025Hydrological situation

Unsettled weather has kept the blue-green algae situation moderate

19.6.2025Hydrological situation

A calm start for the blue-green algae season

8.8.2024Hydrological situation

The number of blue-green algae observations has increased slightly in inland waters and on the coast of Southwest Finland

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