Yes, well water can replenish itself, although not always. The conditions in the area, the source of the water, and the well size and depth all affect its ability to replenish itself. Most wells take groundwater from aquifers underground, which are replenished naturally by rainwater that seeps through layers of rocks and soils. Some wells might not be able to replenish as quickly as the water is used, causing the well water to temporarily dry out.