What is the standard for softened water?

There are no special industry standards for drinking softened water in hotels, as long as it meets the national drinking water standards.

If there are others, there are requirements. Is it boiler feed water replenishment? Central air conditioning water replenishment? Or other water standards? If it is a boiler and central air conditioner, the same index can be used; the total hardness standard is less than lt; within 0.03mmol/L, the total alkalinity standard of the boiler water should be determined based on the boiler design pressure.