Scale on fixtures, spots on dishes, dry skin — hard well water causes all of these. Here's how to measure your hardness and fix it.
Water hardness comes from dissolved calcium and magnesium ions that water picks up as it moves through limestone, chalk, and gypsum rock formations. Private wells drawing from these formations tend to have higher hardness than surface water sources.
| 0–3 GPG (0–50 mg/L) | Soft — no treatment needed |
| 3–7 GPG (50–120 mg/L) | Slightly hard — minor scale, minimal issues |
| 7–11 GPG (120–180 mg/L) | Hard — noticeable scale, soap scum, appliance wear |
| 11–15 GPG (180–250 mg/L) | Very hard — significant scale, shortened appliance life |
| Above 15 GPG (250+ mg/L) | Extremely hard — aggressive treatment needed |
Ion exchange water softener (best for true softening): Replaces calcium and magnesium with sodium or potassium. Removes hardness completely. The Fleck 5600SXT is the benchmark system at $500–$700 DIY installed.
Fleck 5600SXT — Best Softener for Well Water →Salt-free conditioner (scale prevention only): Converts hardness minerals to a form that won't stick. Doesn't remove hardness. Good for scale prevention; less effective for skin/hair/laundry benefits.
Reverse osmosis (point of use): Removes all minerals including hardness at the kitchen tap. Doesn't treat whole house. Best as a supplement to whole-house treatment.
Well water frequently has both hardness and iron. If your iron is above 3 PPM, install an iron filter (Springwell WF1) before your softener. Running high iron through a softener without pre-treatment fouls the resin and dramatically shortens its effective life.