Every aspect has different sources through which it gets the water and the sources of water: wells, ground, and atmosphere are interlinked.
The source of water in the atmosphere:
The evaporation of groundwater due to excessive heat on the surface of the earth and the ocean surface is considered the source of water for the atmosphere.
The evaporation from green plant surfaces by transpiration and ice surfaces by sublimation increases the water content in the atmosphere.
This water in the atmosphere becomes part of the clouds and again comes back to the earth as precipitation.