Mail-in waterline test kit service. Uses an R2A spread-plate method that incubates at a lower temperature and for a longer time to present a comprehensive spectrum of pathogens. Provides accurate quantification of bacteria up to 1 trillion countable CFU/mL. Samples are barcoded for consistent results and records. Receive collection kit, collect and return samples in provided packaging, and obtain results and images in 5–7 days.