JACO Analytical Laboratory, Inc. was formed in April of 1993 in Sioux Falls, South Dakota. In December of 1993, JACO purchased National Chem Lab and moved into its current location at 103 12th Avenue SW, Ephrata, Washington.
The laboratory originally performed PCB analysis on oil, soil, and water. In conjunction with JACO Analytical Laboratory, JACO Construction offers on-site energized transformer sampling for PCBs.
In 1995, JACO expanded those services to include dissolved gas analysis and oil quality tests for transformer oils. JACO Analytical has continued to expand its services and equipment through the years and has proudly been serving customers throughout the United States.