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Every school district in New York is required to test water fixtures in its schools for lead, a neurotoxin that is especially dangerous for children. For this most recent round of tests, conducted ...

Sometimes there’s such a leap in performance between one year and the next, that it becomes hard to recommend buying a previous year’s model. That's exactly the case with the QM9K.

The high-tech device only requires a 10-minute session each day—here are my honest thoughts of it’s worth the buy.