The problem was compounded by a lack of chlorination systems among water service providers.

By 2006, improvements were made regarding chlorination systems and only 1% of water service providers were non-compliant.

In 1976 the diving area was re-done, along with a new circulation and chlorination system the next year.

But the chlorination system to treat the water in this fountain was not monitored and was probably lacking.

The pool should be filtered for one to two hours daily to keep the automated chlorination system active.

The flood also damaged the plant's chlorination system, which disinfects the sewage, he said.

The fact that a chlorination system exists is not a guarantee that water is actually properly disinfected.

Salt water chlorination, is a process that uses dissolved salt (2,500-6,000 ppm) as a store for the chlorination system.

At the beginning of the 1990s, there were problems regarding the chlorination systems of some water service providers.

Of course, it would be necessary to monitor the chlorine levels and pH of the pool water, just as with any chlorination system.