TED-Ed: When is water safe to drink? - Mia Nacamulli

Water is refreshing, hydrating, and invaluable to your survival. But clean water remains a precious and often scarce commodity - there are nearly 800 million people who still don't have regular access to it. Why is that? And how can you tell whether the water you have access to - whether from a tap or otherwise - is drinkable? Mia Nacamulli examines water contamination and treatment. Lesson by Mia Nacamulli, directed by Rooftop Animation.