Global legionella testing market is expected to grow at a CAGR of 8.6% during the forecast period 2021 to 2027. Legionella is a bacteria, causes a serious form of pneumonia, known as Legionnaires disease. This legionella can be tested using the legionella testing kits, which detects the presence of bacteria. The affects the lower respiratory tract. Legionella bacteria also causes Pontiac fever, with flu-like symptoms. The legionnaires disease and the Pontiac fever are generally referred to as legionellosis. The legionella bacteria is naturally found in environment, stagnant water and warm water. The infection occurs when the individual inhales these airborne water droplets which are contaminated with the legionella bacteria. Despite the low overall incidence of legionnaires disease, the high global growth rate of its prevalence is contributing to the legionella testing market’s growth. In the last five years, there has been a considerable increase in the global prevalence of Legionnaires disease. With the rise in legionella occurrences, there is a critical need for disease management, which helps to drive the entire market. Because of the rising number of patients with legionella infections and the existence of important competitors in the region, North America has dominated the Legionella Testing Market examined. Additionally, in order to regulate the incidence of LD, the US government is raising awareness among the general public through the environmental legionella isolation techniques evaluation (ELITE) programme, which might boost market growth.