Weathered water is water that has been in contact with soil, rocks, and other materials, and has dissolved some of the minerals and materials from them. The amount and type of materials dissolved in weathered water depends on the composition of the soil and rocks through which the water has passed, as well as the amount of time that the water has been in contact with these materials. Weathered water can be used for a variety of purposes, including drinking, irrigation, and industrial processes, but it may require treatment to remove any harmful contaminants or sediment.