Evaluation of the effects of water treatment in indoor multi-basin swimming pools

Abstract

The main objective of this analysis of water test results was to assess the performance of water purification systems in three facilities with multiple swimming pool basins (sports, leisure, wading and spa baths). Evaluation applies to different facilities in terms of the period of operation and the implemented methods of treating the pool water. Two of the indoor pools have had these systems upgraded and the third is new. The water treatment installations used pressure filters but with different filtering materials and in two cases assisted by UV irradiation, and in the newest facility without these devices. The water parameters in the various basins of the studied pools were mostly in line with the current quality standards set out in the 2015 Regulation of the Minister of Health. Analysing the test results, it can be concluded that maintaining acceptable water quality parameters is very difficult and almost impossible when using the simplest technological purification systems. The most frequently occurring problem was too high level of free and bound chlorine and the existence of chloroform. The use of low-pressure UV reactors to support the disinfection of water entering the pool is an important process for improving these pool water quality parameters.