Potable does not mean pure
Potable does not mean pure

Potable water is water that is safe to drink because it contains sufficiently low levels of dissolved salts and harmful microbes. A microbe is a microscopic organism, some types of which can cause disease.
Step-by-step lessons on AQA GCSE Chemistry 10.1.2 Potable water. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.