Suitable filters for water

We live in an area where the semiconductor industry among others has caused the creation of many superfund sites. I was alarmed to read this news about TCE being a carcinogen in the Mountain View Voice. It has contaminated the ground water.

So I was happy to get this update from EWG on how to choose a water filter. I think a reverse osmosis one would be the ideal choice to remove contaminants like perchlorate. The step 4 section allows you to choose from a pulldown menu, which I thought was very nifty!