How Much Does Water Treatment Cost in Montana?
Honest pricing ranges, the factors that move them, and how to make sure you're investing in something that lasts.
Below are typical installed price ranges for residential water treatment across Northwest Montana. Actual pricing depends on your specific water, plumbing, and household size — which is why every project starts with a free in-home water test.
Drinking water RO system
$650 – $1,400
Whole-home carbon filtration
$1,800 – $3,500
Water softener (entry-level dealer)
$2,200 – $3,500
Glacier Peak Series high-efficiency softener
$3,000 – $4,800
Iron filter (well water)
$2,500 – $4,500
Softener + iron filter combo
$5,500 – $8,500
Full well water treatment train
$7,500 – $14,000+
UV purification (add-on)
$1,200 – $2,200
Ranges include professional installation. Financing available with 0% promotional rates for qualified buyers.
What drives the spread?
- • Water chemistry — iron, manganese, sulfur, sediment, and hardness all affect what's needed.
- • Household size and peak demand.
- • Plumbing modifications and drain access.
- • Equipment grade (big-box vs. dealer vs. premium dealer).
- • Whether the system includes warranty and service support.
Ready For Better Water?
Schedule your free in-home water test today. No pressure, just honest answers about what's in your water.