Researchers tested spring, groundwater, and purified bottled waters against local tap to see how treatment shapes the byproducts that emerge — and the differences were striking.

Municipal water plants follow extensive treatment steps to purify water for your tap. The model below is based on the Tampa Water Department's treatment facility. A. Acids and polymers are added to ...

If you live in the District or Northern Virginia, your water might start to smell funny on Monday. That’s because of an annual change to the water purification process — a sort of “spring cleaning” ...