"Cyanobacteria" means a photosynthetic prokaryote within the class Cyanophyceae containing both chlorophyll and phycobillins, some species of which produce cyanotoxins which are toxic to mammals, including humans, and which, when present in large amounts, may cause a blue-green scum to form on the surface of lakes and ponds.
N.H. Admin. Code § Env-Wq 1102.14
(See Revision Note at chapter heading for Env-Wq 1100) #8468, eff 11-1-05