The average temperatures of the control and treated imme-diate samples were highly similar (p > 0.05) (Table 2). This was also the case for the control and treated flushed samples; how-ever, the control flushed samples were slightly warmer than the treated (p > 0.05) (Table 2). There were no significant differences in free chlorine concentrations over time (p > 0.05) or between immediate and post flush samples from the control building (p > 0.05) (Table 2). There was no difference in monochloramine concentration between immediate and flushed samples from the treated building (p > 0.05); however, there was a statistically signif-icant reduction in monochloramine concentration in July (p < 0.01) (Table 2). Despite this reduction in monochloramine concentra-tion all measured values fall within the manufacturer’s suggested effective monochloramine concentration range.