Water Hardness in Illinois

Illinois · 9.18 grains per gallon

$1,039–$1,472

installed, midpoint $1,231 — a 24,000-grain unit, the size 4 people at this hardness need.

Salt and drain water over 10 years: $858–$1,523 — the 10,052,100 grains of hardness this household removes, at the national salt price and water rate whose sources are named below. Filter changes and Service contract are omitted rather than assumed.

Sized for 4 people regenerating every 7 days: 19,278 grains of capacity needed, rounded up to the next common residential size. The median of 156 measured Illinois cities in our hardness dataset. Modelled: the standard build band published for that state at the size this hardness calls for, equipment priced 2026-10-04 against the May 2025 reference period (OEWS M2025). Salt: the median retailer price of 3 retailers, read 2026-10-04, at a declared salt dose per regeneration. Drain water: about 50 gallons per regeneration from a government extension estimate read 2026-10-04, at the 2024 national average water and sewer rate from a government source read 2026-10-04.