Derivation of a Colorado State Manganese Table Value StandardFor The Protection of Aquatic LifeWilliam A.
Stubblefield and James R.
Hockett
ENSR Corporation; 4303 West LaPorte Ave.; Fort Collins, Colorado 80521July 2000 2ABSTRACTManganese is a common constituent of fresh waters, often present at concentrations in themg/L range.
Acute toxicity data were available for twelve freshwater species and median lethal
concentrations (LC50) ranged from a low of 5,322 pg/L for the rainbow trout to a high of274,431 pg/L for the toad, Bufo boreas (data normalized to a hardness of 50 mg/L as CaCO3for comparative purposes).
Manganese acute toxicity decreases ...
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