Long winters, private wells and smoke season shape what Montanans breathe and drink at home. Here are the Montana-specific exposures worth knowing about, and simple steps to check your home.
Mold grows wherever water damage lingers. In Montana, snowmelt and spring runoff, ice dams, frozen or burst pipes, and damp basements and crawl spaces can leave homes and cabins water-damaged, and long winters with closed windows keep moisture and mold spores indoors.
What you can do
Check basements, crawl spaces, attics and under sinks for stains, musty smells or condensation, especially after snowmelt.
Fix leaks and dry wet materials within 12 hours or less. For a fresh leak, burst pipe or flooding, contact a local water-damage restoration company right away, and don’t disturb large areas of mold yourself.
Keep indoor humidity under 50% (a $10–$50 humidity meter from a hardware store makes this easy to check).
Radon is a natural radioactive gas from rock and soil. It’s found in every state, and Montana’s geology means many homes test high. It causes no immediate symptoms, but long-term exposure is a leading cause of lung cancer, so testing is the only way to know your level.
What you can do
Test the lowest lived-in level of your home; inexpensive kits are widely available.
If results are at or above 4 pCi/L, retest and talk with a qualified radon mitigation professional.
Retest every couple of years and after major renovations.
Many Montanans rely on private wells, which the state doesn’t regulate. Arsenic and manganese occur naturally in some Montana groundwater, and MSU Extension reports finding them above health thresholds in about 10 percent of the wells tested through its program.
What you can do
Test your well, including for metals such as arsenic and manganese.
Retest periodically and after floods or nearby construction.
Use bottled water for drinking while you wait for results if you have concerns.
Summer wildfire smoke can settle into valleys for days. Fine smoke particles get indoors, too, so a cleaner-air room at home makes a real difference during smoky periods.
What you can do
Set up a clean room with few windows and a portable HEPA air cleaner that doesn’t produce ozone.
Set your HVAC to recirculate and use a MERV 13 or higher filter if your system allows.
Avoid adding indoor particles: candles, frying, wood stoves and vacuuming without a HEPA filter.
Vermiculite mined near Libby was contaminated with asbestos and was used as insulation in homes across the country. The Libby area is a federal Superfund site, and some properties may still contain asbestos.
What you can do
Don’t disturb old vermiculite insulation; have it assessed by a professional before renovating.
In the Libby area, check with the local asbestos program before renovation work.
Cleaner living resourcesDr. Madeira’s list of water filters, air purifiers and tools for choosing safer everyday products.
When to talk with a doctor
If you have ongoing symptoms such as fatigue, brain fog, headaches or breathing problems, and they seem worse at home or started after a move, leak or renovation, it’s worth discussing your environment with a clinician experienced in environmental medicine. Many symptoms have other causes too, so an individual assessment matters.
Book a free 30-minute discovery call with Dr. Madeira. We’ll start with your why: what you want your health and life to look like, what’s been getting in the way, and whether working together feels right for you.
Dr. Sam Madeira, NMD