My well water pH is 7.06 as measured by an accurate and calibrated tool used for wine making. I have around 15 gpg of hardness. My question is why I am getting between .5 - 1.0 mg/L of copper in my water. I measured the copper where the water enters the house and it was 0.0 (no copper pipes outside house). Inside is a different story. It is below the EPA action level of 1.3 mg/L but I'd rather not have any copper corrosion. With a pH of 7 and the hardness level I have would this indicate something wrong besides water chemistry? Electrolysis?
Also, when the water softener was activated the problem was way worse. Bypassing the softener brought the copper levels down. This makes me think it is a water chemistry issue.