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. Author manuscript; available in PMC: 2021 Mar 2.
Published in final edited form as: Water (Basel). 2020 Mar 2;12(3):1–676. doi: 10.3390/w12030676

Table 1.

Time to 4-log reduction of various Legionella strains at two different concentrations of free chlorine. Adapted from [77].

Legionella Strains * Time to 4-Log Reduction (Min)
0.2 mg/L Free Chlorine 0.5 mg/L Free Chlorine
L. pneumophila serogroup 1
lab strain		 Not achieved 8
L. pneumophila serogroup 1 environmental strain Not achieved 4
L. pneumophila serogroup 7
lab strain		 9 2
L. pneumophila serogroup 8 environmental strain 20 3
L. longbeachae
lab strain		 11 3
*

Lab strains: serogroup 1 (ATCC 33152), serogroup 7 (ATCC 33823), L. longbeachae (ATCC 33462).