Microbiological contamination of the pool water can result in pathogenic (disease producing) microorganisms causing infections to bathers. These contaminants can be introduced into pool water from bathers, from the pool filters or occasionally from defects in pool engineering (e.g. that allow the water to be contaminated with sewage).
Tests should be performed monthly to monitor the presence of indicator micro-organisms. These can indicate operational problems that could result in infections. Additionally, tests should be performed:
- Before a pool is used for the first time;
- Before it is put back into use, after having been shut down for repairs;
- If there are difficulties with the treatment system;
- If contamination has been noted;
- As part of any investigation into possible adverse effects on bathers’ health; and
- To validate changes made to the pool treatment regime, e.g. change in disinfectant, or frequency of addition, or engineering.
- More frequent sampling will be necessary if there is a problem, or for particularly heavily loaded pools.
The results of routine microbiological sampling should always be interpreted in conjunction with:
- Chemical tests performed on site and/or in the laboratory at the time of sample collection; and
- A review of the maintenance records for the pool, including records of the pH, residual disinfectant levels, mechanical failures and water appearance and other untoward events.
Ultimate Swimming Pools LLC performs routine pool sampling using trained and competent personnel. We offer full sampling , testing, reporting and advice on ‘unsatisfactory bacterial results’