Because groundwater is not influenced by rainy or dry seasons, it can be used year round. Also, it maintains an even temperature and a stable quality. Unless polluted, it is mankind's best source of water.
由於地下水不受雨季和旱季影響，一年四季皆可取用，而且水溫平均、水質穩定，在不受污染的情況下，可說是人類最佳的水資源。