ASHRAE 188 is an industry standard dealing with preventing Legionnaires’ disease in water systems in buildings in the United States. Unfortunately, the standard does not go far enough. While it does require the development of a water management plan, it does not require testing for the presence of legionella (the bacteria that causes Legionnaires’ disease) in the water supply. This often leads to a person contracting Legionnaires’ disease and then testing for the presence of the bacteria. This is the proverbial canary in the coal mine scenario, where the miners only knew there was gas after it had spread throughout…