First Trust Water ETF (FIW)

First Trust Water ETF (FIW) is an exchange-traded fund in the Natural Resources category. It has $1.88B in assets, an expense ratio of 0.50% and a 0.71% dividend yield. The fund will normally invest at least 90% of its net assets (including investment borrowings) in the securities that comprise the index. The index is designed to track the performance of small, mid and large capitalization companies that derive a substantial portion of their revenues from the potable water and wastewater industry, according to Clean Edge.