How to Make a Water Filtration System?

To learn how to make a water filtration system, you will need to know a little about water quality. While most city water contains chlorine or chloramine, it can also contain large amounts of sediment, iron, manganese, and other hardness minerals. Water quality varies considerably depending on the source. If you have well water, you will need to know how to test it for contaminants. Also, you will need basic plumbing knowledge and some basic hand tools. 

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Activated charcoal 

Activated charcoal is a common material used in water filtration systems. This material removes many impurities from water without destroying essential minerals. It does this by binding with carbon-based organic contaminants, such as chlorine and salts. Other substances pass through the filter without being trapped. 

Activated charcoal is made from wood or coal. It can also be obtained from coconut shells. When heated in the presence of a gas, the charcoal develops pores, which increase its surface area. The increased surface area improves its ability to adsorb impurities. 

Activated charcoal can be used in water filtration and medical care. However, it should be noted that charcoal cannot adsorb everything. It does not adsorb sodium, nitrates, and certain dissolved inorganic compounds. 


Making a sand water filtration system is simple and fun for the whole family. Using activated charcoal and fine grain sand, you can make your water safe to drink. The system is ideal for a wide range of situations. Even city water can be made drinkable with this system. It removes sediment, chemicals, and debris. 

The sand filter should be constructed with water in it from the bottom. This is because groundwater can contain high amounts of arsenic. You should oxigenate incoming water before pouring it into the filter and regularly drain it to prevent bacteria from multiplying. You can also add iron nails to the top bed of the filter to prevent bacteria from growing there. 

There are three stages in the filtration process. First, a biological layer eats pathogens and bacteria, while the second stage traps sediment and small particles. The third step is natural death of the bacteria and viruses due to depletion of nutrients. 

Small pebbles 

Small pebbles are excellent for water filtration, as they add trace minerals to the water. They mimic the effect of rocks in mountain streams and help raise the pH level to a level that is suitable for everyday consumption. They weigh about 700 grams and can be changed every two years. They are very easy to clean and don’t require much maintenance. 

Students will create their own water filtration device by following the same process NASA uses to create water filtration systems for the International Space Station. They will experiment with multiple designs and look at materials to find the most effective one. They will then record their findings. While the final product won’t be drinkable, it will help the students learn about different materials and what makes them effective. 

A simple charcoal filter is another effective way to filter water. It should be at least three inches deep. Then, a coffee filter should be placed over it to prevent the charcoal from dissolving. The charcoal filter will remove most of the particles in the water, but it doesn’t remove every bit of dirt or other particles. Other options for filters include fine sand, coarse sand, and small pebbles. A good filtration system should have several filter stages.