On the West coast of New Zealand's North island, Mount Taranaki, an active volcano has reportedly been eroding at a constant and dangerous rate. Aerial pictures show that between the years 1995 and 2007, approximately 14.3 million cubic metres of loose rock and sand has eroded away from the mountain. At the first sign of recent rockslides, locals believed that this was a sign of an eruption from the dormant, yet active volcano. Although there has not yet been a threat of an eruption, locals still have another problem on their hands. The erosion from the mountain has dropped rock and sand down its side disturbing the "sources of domestic water supplies." I was not sure what they meant by domestic water supplies, but I can insinuate that they perhaps mean that the sediment has blocked passages where water once flowed. This would mean that water is no longer distributed to certain wells along the plain.

http://www.nzherald.co.nz/environment/news/article.cfm?c_id=39&objectid=10691052