The business magazineInc. has named APTech Group, Cincinnati, to its 2011 Inc. 500/5000 list of the fastest growing private companies in America. APTech, a maker of water treatment products, ranked No. 3,772, with 39 percent three-year sales growth. To compile its list, which is in fifth year,Inc. looks at U.S. independent entrepreneurs.

“It is gratifying to be recognized for our efforts and success as we continue to develop and manufacture sustainable products for the water treatment industry,” says James Heimert, APTech's CEO. APTech's products are used in cooling towers, closed-loop systems and boilers.

Despite stagnant economic environment, the median growth rate of the 2011 Inc. 500|5000 companies was 94 percent. The companies on this year’s list report having created 350,000 jobs in the past three years. Aggregate revenue among the named companies reached $366 billion, up 14 percent from last year.