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

Below are the top small-cap pollution & treatment controls stocks on the NYSE and the NASDAQ in terms of operating margin. The trailing-twelve-month operating margin at Calgon Carbon (NYSE:

) is 12.55%. Calgon Carbon's ROE for the same period is 11.91%. The trailing-twelve-month operating margin at CECO Environmental (NASDAQ:

) is 10.38%. CECO Environmental's revenue for the same period is $162.92 million. The trailing-twelve-month operating margin at Tennant Company (NYSE:

) is 8.75%. Tennant's PEG ratio is 1.22. The trailing-twelve-month operating margin at Fuel-Tech (NASDAQ:

) is 7.54%. Fuel-Tech's EPS for the same period is $0.21.