The amount of water is very important, so the only thing you need to measure is the water. The amount you need is printed on the label on the bag.
Water quality and temperature can have an effect on the bread or more precisely the yeast that causes the bread to rise. If your water has too much chlorine in it, it may kill the yeast and the bread won’t rise. If that is the case, use bottled water or boil your water for 5 minutes, then let it cool, as water over 140 degrees Fahrenheit will also kill the yeast.