Referring to a type of aquifer or water source located below the earth's surface that is not under pressure.

भूमिगत जलाशय

English Usage: The sub artesian well provided the community with a steady supply of fresh water.

Hindi Usage: भूमिगत जलाशय ने समुदाय को ताजे पानी की निरंतर आपूर्ति प्रदान की।