Wellness Clean Beauty Quick Tip: Don't Use Antibacterial Soap... By Michael Graham Richard Writer University of Ottawa Michael Graham Richard is a writer from Ottawa, Ontario. He worked for Treehugger for 11 years, covering science, technology, and transportation. our editorial process Twitter Twitter Michael Graham Richard Updated October 11, 2018 Migrated Image Share Twitter Pinterest Email Wellness Health & Well-being Clean Beauty ...unless you really have to. The two main reasons are that it can encourage the breeding of more resistant bacteria, and that the micro-organisms used by sewage-treatment plants to purify organic waste are affected by it. When they are rendered less effective, the plants use more harsh chemicals to compensate, thus polluting more.