Table 2

Colony-forming units of bacteria in water samples from recreational water facilities (northern Greece, 2011–2016)

Water categoryMedian no. of colonies (min–max)a/n (%)
Total heterotrophic bacteriaTotal coliformsE. coliPseudomonas aeruginosa
Swimming pools (n = 2,490) 34 (2–300)/763 (30.6) 9.5 (2–60)/78 (3.1) 11 (3–22)/15 (0.6) 10 (2–80)/324 (13.0) 
Jacuzzis/spa (n = 293) 48 (2–300)/105 (35.8) 13 (2–38)/8 (2.7) –/2 (0.7) 18 (2–46)/52 (17.7) 
Ice-plunge pools (n = 61) 34 (2–240)/23 (37.7) – – 11 (3–40)/11 (18.0) 
Total (n = 2,844) 36 (2–300)/891 (31.3) 10 (2–60)/87 (3.1) 10.5 (3–22)/17 (0.6) 12 (2–80)/390 (13.7) 
Water categoryMedian no. of colonies (min–max)a/n (%)
Total heterotrophic bacteriaTotal coliformsE. coliPseudomonas aeruginosa
Swimming pools (n = 2,490) 34 (2–300)/763 (30.6) 9.5 (2–60)/78 (3.1) 11 (3–22)/15 (0.6) 10 (2–80)/324 (13.0) 
Jacuzzis/spa (n = 293) 48 (2–300)/105 (35.8) 13 (2–38)/8 (2.7) –/2 (0.7) 18 (2–46)/52 (17.7) 
Ice-plunge pools (n = 61) 34 (2–240)/23 (37.7) – – 11 (3–40)/11 (18.0) 
Total (n = 2,844) 36 (2–300)/891 (31.3) 10 (2–60)/87 (3.1) 10.5 (3–22)/17 (0.6) 12 (2–80)/390 (13.7) 

n = no. of samples analysed.

aMedian of CFUs is shown due to the statistically abnormal distribution of the samples.

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