After discovering under-the-radar chemicals in our tap water, I splashed out on the best gravity-fed water filter there is. Here’s why you may want to do the same. — For decades a factory in Veneto, Italy, spewed its surplus and waste chemicals into the environment poisoning 127,000 people. Moving swiftly, the Italian authorities cleaned up the polluted water, but the collateral damage is emerging like horrible secrets in a drained lake. …