Top 4 Stocks In The Pollution & Treatment Controls Industry With The Highest Operating Margin

Below are the top pollution & treatment controls stocks in terms of operating margin.

The trailing-twelve-month operating margin at Duoyuan Global Water Inc (NYSE: DGW) is 32.21%. DGW's ROE for the same period is 14.48%.

The trailing-twelve-month operating margin at RINO International Corporation (OTC: RINO) is 23.32%. RINO's revenue for the same period is $218.98 million.

The trailing-twelve-month operating margin at Donaldson Company Inc (NYSE: DCI) is 13.65%. DCI's PEG ratio is 1.46.

The trailing-twelve-month operating margin at Calgon Carbon Corporation (NYSE: CCC) is 11.63%. CCC's PEG ratio is 0.80.