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.
Insoluble oxidized iron (rust) can give water a red tint, manganese oxide causes a black discoloration, and a combination of the two can yield a yellow-brown hue. 4.0 IMPACTS Color of water is referred as colorless and the firs impact of coloration is aesthetics.