Question

question 9 of 10
legionella concentrations are measured by:
choose an option below
colony - forming units/milliliter
total dissolved solids
blowdown
ph level

Explanation:

Legionella is a type of bacteria, so its concentration is quantified by counting viable bacterial colonies. Colony-forming units per milliliter (CFU/mL) is the standard method for measuring bacterial concentrations. The other options measure water properties (total dissolved solids, pH) or a water treatment process (blowdown), not bacterial levels.

Answer:

colony-forming units/milliliter