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

Below are the top small-cap pollution & treatment controls stocks on the NYSE and the NASDAQ in terms of return on equity.

The trailing-twelve-month return on equity at Advanced Emissions Solutions (NASDAQ: ADES) is 51.30%. Advanced Emissions Solutions' revenue for the same period is $269.30 million.

The trailing-twelve-month return on equity at GreenHunter Resources (NYSE: GRH) is 40.50%. GreenHunter Resources' gross margin for the same period is 39%.

The trailing-twelve-month return on equity at Federal Signal (NYSE: FSS) is 19.60%. Federal Signal's PEG ratio is 0.85.

The trailing-twelve-month return on equity at Tennant Company (NYSE: TNC) is 16.10%. Tennant's EPS for the same period is $2.25.