Rinse the pitcher and all other pieces with hot water to remove any suds. Use a clean towel to dry the pitcher or allow it to air-dry before reassembling and reinserting the filter for continued use.

Moments later, I ran tap water from the same faucet through each filter pitcher, then tested their ppm. Water from the Brita showed a TDS of 147 ppm. That's a modest reduction of 21.4 percent.

Water purification systems installed in two ice machines in a Boston hospital were supposed to make the water taste and smell better for patients on a surgery floor—but it ended up killing three ...