You can use a DIY kit from retailers like Lowe’s or Home Depot, or request a report from your local water utility. Testing also reveals other minerals like iron, which may require a specialized softener for removal. 2. Choose the Right Technology
Different systems address hardness in various ways, each with its own trade-offs: How To Choose the BEST WATER SOFTENER For Your Family
Above 7.5 GPG (treatment is highly recommended). Very Hard: Above 16 GPG.
The first and most critical step is determining your water's hardness level, typically measured in grains per gallon (GPG). 0–3 GPG. Moderately Hard: 3.5–7 GPG.