Table 1.

Table 1A. Occurrence of Legionella, Mycobacterium, Pseudomonas, and V. vermiformis in the four CDWDSs.

Table 1B. Occurrence of Legionella, Mycobacterium, Pseudomonas, and V. vermiformis in different seasons

Table 1C. Occurrence of Legionella, Mycobacterium, Pseudomonas, and V. vermiformis at different sampling sites

OP	SW1¹		SW2¹		SW3¹		GW¹		All CDWDSs²
OP	F (%)	n	F (%)	n	F (%)	n	F (%)	n	F (%)	n
*Legionella*	87.5	14	100.0	16	87.5	14	100.0	16	93.8	60
*Mycobacterium*	100.0	16	100.0	16	81.3	13	75.0	12	89.1	57
*Pseudomonas*	6.3	1	75.0	12	62.5	10	87.5	14	57.8	37
*V. vermiformis*	31.3	5	43.8	7	37.5	6	12.5	2	31.3	20

OP	December 2017¹		March 2018¹		June 2018¹		September 2018¹
OP	F (%)	n	F (%)	n	F (%)	n	F (%)	n
*Legionella*	100.0	16	100.0	16	87.5	14	87.5	14
*Mycobacterium*	87.5	14	93.8	15	87.5	14	87.5	14
*Pseudomonas*	43.8	7	56.3	9	50.0	8	81.3	13
*V. vermiformis*	75.0	12	0.0	0	18.8	3	31.3	5

OP	EP¹		ART³		Tank⁴		MRT¹
OP	F (%)	n	F (%)	n	F (%)	n	F (%)	n
*Legionella*	75.0	12	100.0	20	100.0	12	100.0	16
*Mycobacterium*	56.3	9	100.0	20	100.0	12	100.0	16
*Pseudomonas*	37.5	6	75.0	15	50.0	6	62.5	10
*V. vermiformis*	12.5	2	35.0	7	50.0	6	31.3	5

F: Frequency of detection. n: Number of sampling events where an OP was detected (i.e., number of positive sampling events). A sampling event was positive for a target OP if the concentration of that OP was above the LOD in at least one of the four DNA samples (Tables S4 and S6).

^1:

Number of sampling events: 16.

^2:

Number of sampling events: 64.

^3:

Number of sampling events: 20.

^4:

Number of sampling events: 12.