Kathryn "Kitty" Hach-Darrow (born October 20, 1922) co-founded the Hach Chemical Company in 1947 with her first husband Clifford C.
Hach (pronounced h?:k).
She was essential to the company's expansion, flying her own plane to small airfields across the country to sell water purification kits.
She became president, chief operating officer, and CEO of the Hach company.Kathryn Hach-Darrow was also the first woman director of the American Water Works Association, an international non-profit working for better water quality.
She has been noted for philanthropic work as well as entrepreneurship, and has received a number of awards and honors.