Through the process of filtering, suspended particles, parasites, and bacteria are removed or reduced in concentration. Filtering the water may not be a good option for you, depending on your situation. Many under-sink filtration systems can clean water for more than four people and can get rid of pesticides, heavy metals, and volatile organic compounds. Beyond only filtering your family's drinking water, there are numerous other considerations. A semipermeable membrane is used to buy 3m whole house chlorine removal system during the reverse osmosis process.