The five readings
On site, in front of you
- Total hardness. The number that settles the softener question, and the one most likely to end the conversation early.
- Chlorine. How much disinfectant residual is actually reaching your house.
- Total dissolved solids. The general mineral load, and the number that usually explains taste.
- pH. On a well, the one that quietly destroys copper pipe.
- Iron. The staining and the metallic taste.
You keep the readings, buy or not