Some important microbiological parameters and prevalence of P. aeruginosa in water samples from recreational water facilities (northern Greece, 2011–2016)
| Water category . | Compliant with disinfection standarda . | Total heterotrophic bacteria (>200/mL) . | Total coliforms (>15/100 mL) . | E. coli (>0/100 mL) . | P. aeruginosa (>0/100 mL) . | Compliance with microbiological standardsa . | Compliance with microbiological standards taking into account the presence of P. aeruginosa . |
|---|---|---|---|---|---|---|---|
| No. (%) . | No. (%) . | No. (%) . | No. (%) . | No. (%) . | No. (%) . | No. (%) . | |
| Swimming pools (n = 2,490) | 2,437 (97.9) | 35 (1.4) | 24 (1.0) | 15 (0.6) | 362 (14.5) | 2,375 (95.4) | 2,034 (81.7) |
| Jacuzzis/spas (n = 293) | 287 (98.0) | 10 (3.4) | 4 (1.4) | 2 (0.7) | 52 (17.7) | 277 (94.5) | 226 (77.1) |
| Ice-plunge pools (n = 61) | 61 (100.0) | 1 (1.6) | 0 (0.0) | 0 (0.0) | 14 (23.0) | 60 (98.4) | 47 (77.0) |
| Total (n = 2,844) | 2,785 (98.0) | 46 (1.6) | 28 (1.0) | 17 (0.6) | 433 (15.2) | 2,712 (95.4) | 2,307 (81.1) |
| Water category . | Compliant with disinfection standarda . | Total heterotrophic bacteria (>200/mL) . | Total coliforms (>15/100 mL) . | E. coli (>0/100 mL) . | P. aeruginosa (>0/100 mL) . | Compliance with microbiological standardsa . | Compliance with microbiological standards taking into account the presence of P. aeruginosa . |
|---|---|---|---|---|---|---|---|
| No. (%) . | No. (%) . | No. (%) . | No. (%) . | No. (%) . | No. (%) . | No. (%) . | |
| Swimming pools (n = 2,490) | 2,437 (97.9) | 35 (1.4) | 24 (1.0) | 15 (0.6) | 362 (14.5) | 2,375 (95.4) | 2,034 (81.7) |
| Jacuzzis/spas (n = 293) | 287 (98.0) | 10 (3.4) | 4 (1.4) | 2 (0.7) | 52 (17.7) | 277 (94.5) | 226 (77.1) |
| Ice-plunge pools (n = 61) | 61 (100.0) | 1 (1.6) | 0 (0.0) | 0 (0.0) | 14 (23.0) | 60 (98.4) | 47 (77.0) |
| Total (n = 2,844) | 2,785 (98.0) | 46 (1.6) | 28 (1.0) | 17 (0.6) | 433 (15.2) | 2,712 (95.4) | 2,307 (81.1) |
n = no. of samples analysed.
aGreek hygiene regulations (limit values): chlorination 0.4–0.8 ppm (>0.8 is considered as hyperchlorination); the limit for residual bromine is 8.0 ppm; total heterotrophic bacteria < 200/mL, total coliforms < 15/100 mL, E. coli 0/100 mL.