Well Water Testing & Treatment in the Flathead Valley
Public water systems are tested regularly; private wells are tested only when the owner does it. Most Flathead Valley wells produce good water, but problems like bacteria or nitrates have no taste or smell — the only way to know is to test. If you need help with testing, disinfection, or treatment equipment, we'll connect you with a local professional.
How often to test
- Every year: total coliform bacteria (and E. coli if coliform is present) and nitrates are commonly recommended.
- Any time the water changes in taste, color or smell, after flooding, or after well or pump work.
- Before buying a home — see well inspections.
- If you have infants or someone pregnant in the home, nitrate testing is especially important.
Use a state-certified lab. The Flathead City-County Health Department and Montana DEQ can point you to testing options.
Common well water issues
| Problem | Typical signs | Common fixes |
|---|---|---|
| Coliform bacteria | None — only a test shows it | Find the source (cap, casing, seal), shock chlorination, sometimes UV disinfection |
| Nitrates | None | Identify source (septic, fertilizer); reverse osmosis for drinking water; sometimes a deeper well |
| Iron & manganese | Orange/brown or black staining, metallic taste | Iron filtration, oxidizing filters |
| Hardness | Scale on fixtures, spotty dishes | Water softener |
| Rotten-egg smell | Sulfur odor, often worse on hot water | Shock chlorination, aeration or filtration; check the water heater anode |
| Sediment | Gritty or cloudy water | Sediment filter; pump depth or well screen repair |
Treatment options to ask about
- Sediment and carbon filters
- Water softeners
- Iron/manganese filtration
- UV disinfection
- Reverse osmosis for drinking water
Get a lab test first. The right equipment depends on what's actually in your water.
Water testing & treatment by area
Questions about your well water?
We'll connect you with a local professional.
Call (406) 446-7883 or request help online →