Unless you’re looking out at the ocean, blue water isn’t necessarily a welcome sight. In fact, blue or green tap water can be a sign that your water system is experiencing copper corrosion.  Copper corrosion in your pipes is no different than the iodized copper that makes up the Statue of Liberty. Years of rain and pollution caused the monument’s copper to corrode, giving it its familiar blue/green hue. If your pipes are copper, they can become corroded due to acidic sediment in your water or salt in your water.  While other water-color issues may be safe to consume – blue or green water is not. Be sure to have your water tested by a laboratory and your pipes checked by a professional plumber.