https://www.emergency-wash.org/water/en/technologies/technology/spring-water

👉🏼 PDF:  https://app.box.com/s/qgi6dnbdnb60z82hp1zz04zcvsfxcna0 _ A Spring is formed where groundwater exits the surface at a particular point. When the water comes from unconfined aquifers where the water surface is open to atmospheric pressure, gravity springs are formed, and when the water comes from a confined aquifer that is under pressure, artesian springs are formed. Springs are useful in all phases of an emergency.