Top 4 Small-Cap Stocks In The Pollution & Treatment Controls Industry With The Highest Gross Margin

Below are the top small-cap pollution & treatment controls stocks in terms of gross margin.

The trailing-twelve-month gross margin at Energy Recovery, Inc. (NASDAQ: ERII) is 54.90 percent. Energy Recovery's revenue for the same period is $30.40 million.

The trailing-twelve-month gross margin at Fuel Tech Inc (NASDAQ: FTEK) is 43.00 percent. Fuel Tech's EPS growth forecast for the next five years is 12.10 percent.

The trailing-twelve-month gross margin at Calgon Carbon Corporation (NYSE: CCC) is 34.70 percent. Calgon Carbon's ROE for the same period is 12 percent.

The trailing-twelve-month gross margin at Greenhunter Resources Inc (NYSE: GRH) is 32.50 percent. Greenhunter Resources ROI for the same period is 31.90 percent.