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. 2015 Jul 1;4(3):470–502. doi: 10.3390/pathogens4030470

Table 3.

Correlation of various parameters in 40 cooling towers in Japan.

Parameter Water Temperature pH Heterotrophic Bacteria Legionella
Heterotrophic bacteria 0.190 0.331 *
Legionella 0.311* 0.319 * 0.104
Ciliates 0.332* 0.388 * 0.146 0.300 *
Flagellates 0.122 0.042 −0.079 0.383 *
Amoeba 0.328* 0.208 0.002 0.300 *

* Correlation was significant (p < 0.01; 99% confidence; Source: [21].