Dunno, but I liked Brita personally.

Best is a water distiller. Not as cheap as Brita, but vastly superior. Removes all contaminants: viruses, bacteria, algae, minerals, dust and sand, everything! create vital water that detoxes your body as it attracts toxins and eliminates them. You can get decent entry grade distillers for around $300. Never buy bottled water again! FYI, if you don't change your Brita filter every month you are growing bacteria in your water.