No building could ever function without an appropriate plumbing system that provides clean water and safely removes wastewater. While you may primarily rely on your water supply lines, drainage systems, and sewer lines, there is a lot more involved in the world of plumbing. Think of water heaters, sump pumps, and water softeners and the benefits they bring to homes in San Antonio. Unlike other parts of the United States, San Antonio is known to be one of the cities with the hardest water. There is a simple reason for this. Most of San Antonio's supply comes from the Edwards Aquifer, which is located underground, surrounded by porous rocks like limestones. Dealing with a water hardness of 18 to 28 grains per gallon is not uncommon.