The pH is one parameter, the other three are GH (general or total hardness), KH (carbonate hardness or Alkalinity) and temperature. The temperature we can easily control with aquarium or room heaters, and the GH and KH will tend to remain at the level in the source (tap) water. So you could find these two numbers from your municipal water authority, check their website. Make sure you get the number and their unit of measurement as the latter varies.
Once we have the GH which is the most crucial (of GH, KH and pH) we will be good to go with suggestions. A pH of 7 might lead us to either side of soft or moderately hard, so we need to pin this down.