Prior to filming at a chosen lake, pond or stream, Universal, Disney, Sony and Warner Bros. film crews depend on Ellis to first test the water for contaminants, usually for coliforms, E. Coli and HPC. Results are compared to published recreational standards.

 

Last year, the U.S. Post Office asked Ellis to test the water quality at 65 potable source points (kitchens, water fountains and sinks) in its two major Los Angeles transfer facilities.