How to Make a DIY Water Filter at Home Water pollution is a serious issue that affects millions of people around the world . It can be caused by: Agricultural activities Industrial waste Household garbage and sewage To help tackle this problem, you can build a simple and inexpensive water filter using basic materials. Heres how: — 藺 What Youll Need: A plastic or glass container with a hole at the bottom 林 Coarse sand Small stones or gravel 直 Activated charcoal from a pharmacy or crushed charcoal A plastic or glass tube for drainage A lid or cork to seal the filter 梨 — Steps to Build the Filter: 1 Add a 5 cm layer of coarse sand at the bottom of the container. 2 Pour a layer of gravel or small stones on top of the sand. 3 Add a layer of activated charcoal above the gravel. 4 Insert the drainage tube through the hole at the bottom. 5 Seal the container tightly with a cork or lid to prevent leaks. 6 Pour dirty water into the top and watch as cleaner water flows out from the tube. — This basic filtration system helps improve water quality for household uses. Note: The filtered water is not safe to drink unless it is boiled or treated further.