Coal mines in four districts of Nagaland—Mon, Longleng, Mokokchung and Wokha is adversely affecting the aquatic life of the state. This has come to light in a survey report which was conducted by Nagaland Pollution Control Board (NPCB). This four Nagaland district has a total of 48 coal mine sites which have been in operation for the last 9 years.
According to the report, acidic water and high sediments level easily kill fishes. The study also found that there is acidic water in the underground aquifers in some of the coal mines. In addition, waste water from the coal preparation plants and mines are the other sources of water pollution in the state.
The survey report also pointed out that coal mining consumes, diverts and dangerously pollutes local water supplies as a result of dumping and leaking of toxic wastes. This contaminates rivers, streams, underground water and soil, threatening the lives of animals and human.