Dear Sue,
A couple of points to clarify your response:
1) Your statement “In fact, system filters can actually provide a place for the NTM to grow. ” might confuse readers as to the real value of using 0.2 micron filters, which prevent the passage of NTM, even though this may grow in the filter. Some filters that have been shown not to be effective for NTM are those charcoal-based, which are very popular.
2) Regarding your next statement “ if you remove the NTM with a whole house filter, but the water sits in your pipes & taps which are already contaminated, it will pick up bacteria.”, it would be useful to clarify that it applies to the water that sits in your pipes and taps after the filter, in other words, between the filter and the point of delivery.
Armando