A study looked at phosphorus levels in Pittsburgh streams before and after drinking water was treated with a chemical to ...

TROY (NEWS10) – On Wednesday, the City of Troy began adding orthophosphate to its water treatment process, a move mandated by the Environmental Protection Agency (EPA) to address elevated lead levels.

Six years after Denver Water detected elevated lead in tap water at some homes, state health officials have ordered the injection of a chemical into water supplies to slow lead-pipe corrosion — but ...

The Pittsburgh Water and Sewer Authority on Monday began adding a lead control chemical to the northern portion of its system and advised residents of the North Side and Millvale that they could ...