Chromium-6 is a contaminant often found in tap water with over 250 Americans being exposed to it daily. Among other toxic contaminants also found, chromium-6 is especially worrisome because it can cause cancer. It is also linked to lung and liver damage as well as reproductive and development issues. As of right now, only California has legislation limiting the amounts of chromium-6 in tap water. If you are concerned, resources in this article can help you find out if you are at risk and what to do about it.