Legionella Testing

I call for a industrial water plant for the reason that I am aperture a company of water purification to provisions clean water house to house services so some one inform me from somewhere I can get the industrial water plant because industrial water plant can disinfect the water superior than the confined company plant so buddy any one know the healthier company that have the industrial water purification plant ? In the other way i have searched a web http://www.jnblabs.com/ which gives Industrial Water Treatments & water purification in NJ, PA, MD, CT, DE & NY...tell me your opinion please