The Te Mato Vai project management unit has assessed the most commonly used water supply disinfection options – these are UV, ozone and chemical (chlorine) systems. Factors considered include safety, complexity, reliability, capital cost, and ongoing operational and maintenance costs.
Based on this assessment, the PMU recommends chlorination (using a chlorine solution made in Rarotonga from imported chlorine granule) as the safest, most cost-effective and reliable disinfection system for Rarotonga.
The following table explains why we are recommending chlorination as the most suitable option.
