Translations:Järviwiki:Ohje/Näin teet havainnot/Sinilevätilanne/12/en

No blue-green algae	No cyanobacteria are detectable on the water surface or in shallow water near the shore. Depth of view is normal.
Some blue-green algae	Blue-green algae can be seen as greenish flakes or sticks in the water. Algae is visible if water is taken into a transparent container. Narrow stripes of algae may have drifted onto the beach. Algae impairs depth of vision.
Abundant with blue-green algae	The water is clearly rich in algae, or small algal rafts have risen to the surface or algae deposits have drifted onto the beach.
Very abundant with blue-green algae	Algae form extensive algal rafts or have drifted ashore into thick piles.