orthophosphate

Kathleen J. Davis / 90.5 WESA

Lead levels for Pittsburgh Water and Sewer Authority remain higher than the federal action level of 15 parts per billion. However, the latest rounds of test results revealed that a chemical additive has reduced lead in water.

Margaret J. Krauss / 90.5 WESA

By the end of March, Pittsburgh Water and Sewer Authority must begin treating its water with a type of chemical called orthophosphate to lower lead levels.