Why do I have cloudy water at home?

Why does my home's water look cloudy? A build up of trapped air in your water pipes can cause water to become carbonated and look cloudy. However, this is harmless. Your water pipes may also be contaminated with small particles such as rock, stone, sand or dirt which leads to cloudy looking water. If the cloudy water is caused by more serious contaminates though, installing a RO system is the next step.