Cyanobacteria update 9-17-18
Long Pond Marston Mills
Long Pond Centerville
Toxic cyanobacteria are present <20,000cells/ml. Cyanobacteria may have not collected into a film on the surface. Pond shows slight discoloration, but you can easily see through water.
Toxic cyanobacteria may have started to collect and form a film on the surface >20,000 cell/ml and Microcystin (toxin) 1-5 ppb. Pond shows slight to moderate discoloration.
You can see through water, but water is cloudy.
Toxic cyanobacteria have collected and formed a scum on shore, or a thick film on the surface (looks like soup or paint)>70,000cells/ml and Microcystin toxin >10ppb. Pond shows moderate to extreme discoloration.
Water is very cloudy -visibility <4ft.
If you have questions call the Health Division 508-862-4641