@ansley You will read a wide variety of opinions, here on Connect and in other MAC/Bronchiectasis groups, about what measures to take to be safe.
Just remember, MAC/NTM are everywhere, and cannot be completely avoided without living in a sterile bubble, so it's a matter of "choosing your battles" - that is, mitigating the highest risks and letting everything else go - otherwise you could devote your entire life to treatments, precautions and avoidance.
That said, I wash my produce in filtered tap water. If appropriate (potatoes, etc) I give it a good scrub with a stiff brush. Other people may be more wary, but it works for me.
I choose to spend my energy on "high-return" efforts like airway clearance, exercise and healthy diet. And use caution to avoid or minimize exposure to "high-risk" situations - hot tubs, indoor pools, steamy showers and sick people. This is the approach suggested to me over 5 years ago by my ID doc and PCP, and it has served me well.
Sue