Dr Joe Falkinham is the US authority on NTM in water. He and his students, in his university laboratories, did extensive testing. They deemed the bottled spring water safe.

Filtration companies are not the place to have your water tested for mycobacteria. It is a laboratory test done in just a few labs in the country. The one that tested ours six years ago is either gone or under another name. You said "If you want a test for MAC, that one test alone is about $500 and is only for that day. It could change the next day...." Can you explain why? My water is considered safe because my home also has pink slime mold - per Dr Falkinham, they cannot exist in the same environment. But, as an additional precaution, we keep our water heater set to 135F. At that temperature NTM does not survive.