DPW Chief Guilford Mooring confirms, "The heat (weather) is a factor and we will probably have to chlorinate the south side of Town for a while." But he also pointed out reassuringly, "We had very low counts of total coliform colonies in the failed samples."
Back in late October, 2010 the public water tested worse than this time around and the town came within a drop of declaring a "boil water" alert. At the time UMass was hosting a pair of sold out Phish concerts at the Mullins Center.
The town fired up its Emergency Operations Command to deal with the potential crisis, but follow up tests showed the problem went away.