Minimun Water pressure for home in US
Given that the low pressure readings throughout your house were taken with zero flow from the water main to the house, the only possible cause is low water pressure in the water main.  There's nothing on your household side that could cause this zero flow low pressure reading.

There will be a height factor.  The higher you are above the connection to the water main, the lower the static pressure will be.  A rough guide is that you lose 1 psi for every 2 feet of vertical rise. Clearly, you can easily reach a height that the water cannot reach.

A consequence of this is that you, and all the others experiencing this low pressure, represent a potential hazard because of possible backflow into the water main.

Here http://www.freetoursbyfoot.com/water-towers-new-york/, is how the problem is solved in New York City, where tall buildings overwhelm the normal water main pressure.

Is your local utility missing a water tower?