A UK hospital with a very large footprint began measuring drinking water quality from their domestic water system in 2000 and noticed it had microbial contamination and high TVC's in many of their outlets. The two predominant problems were E-coli and Legionella. They set up an advisory team to address this problem and laid out a number of parameters. The following constraints that affected their decision to move forward were:

1. The finding of an effective chemical agent
2. The in-use safety of the agent
3. The ease with which the agent could be handled and applied
4. The vulnerability of the patients involved
5. The lack of decant facilities
6. The age and materials of construction of the various pipework systems.

They decided that Huwa-San technology could perhaps meet these requirements where conventional chlorine or chlorine dioxide could not. They implemented automated dosing of Huwa-San technology and measured extensively over a period of two years and found that their problem had been completely eradicated. There had been no positive counts on any of the extensive sampling points.