not @sueinmn but two water testing places that have been mentioned in this forum are:
https://specialpathogenslab.com
https://mytapscore.com/products/mycobacterium-water-test
Likely there are more testing places. Perhaps start with your local municipality for suggestions. Be prepared for them to be confused! They think chlorine kills everything.

Some people believe water testing is ineffective because water delivery to your home is a dynamic rather than static process. What might test negative one day, the next might be positive. On the other hand, if testing provides peace of mind then perhaps it's worth doing.

This thread has officially gone far afield and off topic!