There is much empirical evidence that NTM infection may occur by exposure to organisms in the environment such as our water and soil.
Doctors believe that some patients with underlying lung conditions or other vulnerabilities may become infected with NTM from inhalation of mycobacteria that become aerosolized when in an enclosed space like a pool or sauna, or in a hot tub.
Reduce Exposure to NTM Aerosols
Reduce the Numbers of NTM in Your Household Water System
Use humidifiers with caution. Avoid ultrasonic humidifiers if possible, and clean your humidifier’s reservoir frequently. Soak it in undiluted bleach for 30 minutes and rinse it thoroughly.
Other Things You Can Do to Help Reduce Exposure