One can locate the pressure delivered to the house by looking for pressure information as located on the gas meter regulator. Different models may have the data in various locations. In this case it is on the end cap of the regulator.
At my location it is 6.5 to 7.5 WC (water column) which converts to .235 to .271 PSI or about 1/4 PSI. To convert WC to PSI search for the converter on the web.