1980 – Bluegrass Water Treatment Company was founded by Jimmy and Helen McGee in Louisville, KY.
1981 – KESCO was founded by Dennis and Patsy Monohan in Lexington, KY.
1987 – The two companies were merged and became Bluegrass KESCO, Inc. or BK for short.
1994 – BK bought the water treatment business from Livingston Laboratories in Owensboro, KY.
2007 – BK bought a water equipment company, Performance Products, in Louisville, KY.
2019 – BK celebrated its 39th year in the industrial and commercial water treatment business.