I have the Brita Faucet Filter with advanced features model FF-100. I like it because the light tells me when to change the filter. Yes, it does filter out Cryptosporidium and giardia. If you click on the link scroll down to advanced features and then click on impurities reduction it will give you an analysis of what it does. http://www.brita.com/products/faucet-filtration/advanced/.