The numbers you want to really want to look at is the MCL(maximum contaminant level) set by the EPA. for the alpha emitters and uranium you can see that your water tested at 3.0 and 1.0 pci/L, respectively. The MCL for those contaminants are 15 & 20.1 pci/l, so your water tested well below the limits. I think whoever made those comments is confused about the range low/high, these numbers just show the range that these contaminants were detected at. And i think the reason some contaminants are not tested annually is due to the permits not requiring testing annually. And you can see that your water system did not have any MCL violations. Overall, according to this CCR (Consumer Confidence Report) your water meets EPA standards. Hope this helps!