national monument. noun. Definition of national monument for English Language Learners. : a place (such as an old building or an area of land) that is owned and protected by a national government because of its natural beauty or its importance to history or science. Britannica.com: Encyclopedia article about national monument.
Brown or discolored water is caused by minerals, sediment, or rust that may accumulate in the water mains over time. When the water from your tap is brown this indicates a disturbance in the water main that stirs up these deposits.
Blue-Green Stains â Thatâs Acidic Water. Acidic water is corrosive to your pipes, which then leaves blue green stains in your fixtures. This causes the water to taste bitter and metallic, and can increase the amount of copper and lead in your drinking water. Because the acid is eating away at your pipes, it can eventually cause pin-hole leaks. Acidic water means a low pH BELOW 7.0.