The recommended pH range for drinking water in the U.S. is 6.5 to 8. If the pH is below 6.5, the water is too acidic and may be unsafe to drink. Acidic water often has heavy metals in it. Even without those metals, acidic water can harm dental, bone, and digestive health. To avoid these health issues, Full Swing Plumbing, Heating, & Air recommends acid neutralization water treatment in Cohasset, MA. An acid neutralizer is a whole-house system that provides optimal pH levels throughout your home.