A Louisiana, USA municipality performed a survey of their potable water distribution system in September 2013. A total of 47 sample taps were tested for Free Chlorinie, Total Chlorine, and Cellular ATP using LuminUltra's Quench-Gone Aqueous (QGA) test kit.
Summary of Findings
The results of the initial survey showed that more than half of the sample points carried less than 0.5mg/L of Total Chlorine and the highest Free Available Chlorine (FAC) result was only 0.11mg/L. As such, it was no surprise that several points were revealed to have an elevated level of microbiological activity as determined via ATP testing. An ATP content of >10pg/mL is indicative of a high level of biological content and therefore sample collection points 3, 4, 5, 25, and 26 were deemed to require immediate action.
A flushing program was immediately devised in attempt to restore water quality to a low level of biological activity and restore free chlorine residuals.
Download the full case study and see how 2nd generation helped this municipality optimize their flushing activities.