Groundwater is formed from surface water. That seeps through various soil layers until reaching the soil or rock layers that do not seep water and accumulated between the gaps of the soil Especially the soil layer is gravel, sand, rock, the amount of water trapped in such soil layer will gradually increase in the rainy season and decrease in the dry season Groundwater has the same level of transfer as surface water. Humans make use of groundwater by drilling artesian wells.
Surface water
Refers to the portion of rainwater that falls to the ground and flows into the lowlands along rivers, canals, lakes, reservoirs, swamps and marshes. This can be seen from streams or creeks that have water flowing all year round whether it rains or not. The amount of water flowing in a creek or stream during the dry season It is the water that accumulates underground and is absorbed all the time when it does not rain. Flow on the ground This causes surface water to be contaminated by the environment in various forms. Surface water may have high turbidity and organic matter. The amount of mineral salts in the water may be more or less.
Tap water
Tap water means quality water that is suitable for safe drinking. With a water distribution system along the pipelines so that water users can get enough water to meet their needs General features Tap water should always have CI2 chlorine in the water. Although the tap water is of good quality. It is clear and clean through the quality improvement process. Or is tap water that has been processed by any method It must be disinfected with chlorine. This is considered the minimum requirement of tap water production. Therefore, there will always be dissolved chlorine gas in tap water.