Is Helena, Montana Shower Water Safe? What's In Your Water (2026)
Khat Cruz
Last updated: April 2026.
Is Helena, Montana Shower Water Safe?
Population: 33,124 · Water Source: Tenmile Creek, Missouri River
Understanding what's in your shower water is crucial for health-conscious consumers in Helena, Montana. With concerns about skin irritation, hair damage, and unknown contaminants, knowing your water quality is the first step to a safer and more comfortable showering experience. This guide provides essential information about Helena's water in 2026.
💧 Where Does Helena's Water Come From?
Primary Source: Tenmile Creek, Missouri River
Helena's primary drinking water comes from Tenmile Creek, supplemented by the Missouri River during peak demand or drought conditions. The water is treated at the Tenmile Water Treatment Plant, undergoing processes to ensure it meets federal and state drinking water standards before distribution to homes.
Treatment: Coagulation, flocculation, sedimentation, filtration, and chlorine disinfection.
🔬 What's In Helena's Shower Water?
Here are the key contaminants detected in Helena's water supply based on real testing data from the EWG Tap Water Database:
| Contaminant | Level Found | EPA Limit | EWG Guideline | Status |
|---|---|---|---|---|
| 1,2,3-Trichloropropane | 0.735 ppb | No federal limit | 0.0007 ppb | ⚠️ Exceeds EWG Health Guideline (1050x above) |
| Haloacetic acids (HAA9) | 44.13 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (736x above) |
| Arsenic | 12.38 ppb | 10.0 ppb | 0.0040 ppb | 🚨 ABOVE EPA LIMIT (3096x above) |
| Haloacetic acids (HAA5) | 53.83 ppb | 60.0 ppb | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (538x above) |
| Total trihalomethanes (TTHMs) | 46.00 ppb | 80.0 ppb | 0.150 ppb | ⚠️ Exceeds EWG Health Guideline (307x above) |
| Trichloroacetic acid | 27.33 ppb | No federal limit | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (273x above) |
| Dichloroacetic acid | 21.50 ppb | No federal limit | 0.200 ppb | ⚠️ Exceeds EWG Health Guideline (107x above) |
| Chloroform | 42.50 ppb | No federal limit | 0.400 ppb | ⚠️ Exceeds EWG Health Guideline (106x above) |
| Bromodichloromethane | 5.79 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (97x above) |
| Bromochloroacetic acid | 1.88 ppb | No federal limit | 0.020 ppb | ⚠️ Exceeds EWG Health Guideline (94x above) |
Contaminant Details
1,2,3-Trichloropropane
The health guideline of 0.0007 ppb for 1,2,3-trichloropropane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.
Comparison: State average: 0.0005 ppb. National average: 0.0004 ppb.
Shower Impact: These disinfection byproducts become airborne in hot shower steam. You can inhale and absorb them through your skin, potentially increasing your exposure beyond just drinking water.
Haloacetic acids (HAA9)
The health guideline of 0.06 ppb for haloacetic acids (HAA9) was defined by EWG . This health guideline protects against cancer.
Comparison: State average: 31.06 ppb. National average: 23.70 ppb.
Shower Impact: These disinfection byproducts become airborne in hot shower steam. You can inhale and absorb them through your skin, potentially increasing your exposure beyond just drinking water.
Arsenic
The health guideline of 0.004 ppb for arsenic was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.
Comparison: State average: 1.85 ppb. National average: 0.624 ppb.
Shower Impact: Arsenic in shower water can be absorbed through the skin. Long hot showers increase exposure time and absorption.
Haloacetic acids (HAA5)
The health guideline of 0.1 ppb for haloacetic acids (HAA5) was defined by as . This health guideline protects against cancer.
Comparison: State average: 20.61 ppb. National average: 19.82 ppb.
Shower Impact: These disinfection byproducts become airborne in hot shower steam. You can inhale and absorb them through your skin, potentially increasing your exposure beyond just drinking water.
Total trihalomethanes (TTHMs)
The health guideline of 0.15 ppb for trihalomethanes was defined by in a peer-reviewed scientific study by EWG and represents a one-in-one-million lifetime cancer risk level. as a draft public health goal, the level of drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.
Comparison: State average: 22.17 ppb. National average: 29.06 ppb.
Shower Impact: These disinfection byproducts become airborne in hot shower steam. You can inhale and absorb them through your skin, potentially increasing your exposure beyond just drinking water.
Trichloroacetic acid
The health guideline of 0.1 ppb for trichloroacetic acid was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
Comparison: State average: 10.77 ppb. National average: 6.57 ppb.
Shower Impact: These disinfection byproducts become airborne in hot shower steam. You can inhale and absorb them through your skin, potentially increasing your exposure beyond just drinking water.
Dichloroacetic acid
The health guideline of 0.2 ppb for dichloroacetic acid was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
Comparison: State average: 8.77 ppb. National average: 8.00 ppb.
Shower Impact: These disinfection byproducts become airborne in hot shower steam. You can inhale and absorb them through your skin, potentially increasing your exposure beyond just drinking water.
Chloroform
The health guideline of 0.4 ppb for chloroform was defined by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
Comparison: State average: 16.27 ppb. National average: 16.20 ppb.
Shower Impact: These disinfection byproducts become airborne in hot shower steam. You can inhale and absorb them through your skin, potentially increasing your exposure beyond just drinking water.
Bromodichloromethane
The health guideline of 0.06 ppb for bromodichloromethane was defined by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
Comparison: State average: 4.30 ppb. National average: 5.89 ppb.
Shower Impact: These disinfection byproducts become airborne in hot shower steam. You can inhale and absorb them through your skin, potentially increasing your exposure beyond just drinking water.
Bromochloroacetic acid
The health guideline of 0.02 ppb for bromochloroacetic acid was defined by as . This health guideline protects against cancer.
Comparison: State average: 1.66 ppb. National average: 2.80 ppb.
Shower Impact: These disinfection byproducts become airborne in hot shower steam. You can inhale and absorb them through your skin, potentially increasing your exposure beyond just drinking water.
🧴 How Helena's Water Affects Your Skin, Hair & Health
When you shower, contaminants in the water don't just wash off — they're absorbed through your skin and inhaled as steam. Here's how Helena's water quality may be affecting you:
🧖 Skin Effects
- Increased dryness and flakiness due to chlorine and hard water minerals.
- Exacerbation of eczema and other sensitive skin conditions.
- Soap scum residue on skin, leading to clogged pores and dullness.
- Irritation and redness from harsh chemicals.
💇 Hair Effects
- Dry, brittle, and frizzy hair texture.
- Dullness and lack of shine due to mineral buildup.
- Faster fading of color-treated hair from chlorine.
- Reduced effectiveness of shampoos and conditioners, leading to product buildup.
🫁 Respiratory Effects
- Irritation of nasal passages and lungs from inhaled chlorine and disinfection byproducts in steam.
- Potential exacerbation of asthma and allergies due to chemical vapors.
- Increased sensitivity for individuals with respiratory conditions.
- General discomfort or burning sensation in eyes and throat.
✅ What You Can Do About It
Test Your Home's Water
A professional home water test can reveal specific contaminant levels in your tap water, including those from your home's plumbing, providing a personalized understanding of your water quality.
Install a Quality Shower Filter
A good shower filter can significantly reduce chlorine, chloramine, heavy metals, and other contaminants that negatively impact skin and hair, offering immediate relief from dryness and irritation.
Limit Shower Time and Temperature
Shorter, cooler showers reduce your exposure to volatile chemicals like TTHMs and prevent stripping natural oils from your skin and hair, minimizing dryness.
Moisturize Immediately After Showering
Applying a rich moisturizer within minutes of stepping out of the shower helps lock in hydration, counteracting the drying effects of hard water and chlorine.
Use Gentle, pH-Balanced Products
Opt for shampoos, conditioners, and body washes that are sulfate-free and designed for sensitive skin or hard water to further protect your skin and hair from harsh chemicals and mineral buildup.
Protect Your Skin & Hair From Helena's Water
The easiest way to remove chlorine, heavy metals, and other contaminants from your shower water.
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Related Reading
Is Helena tap water safe to shower in?
Helena's tap water meets EPA drinking water standards, making it generally safe for showering. However, common contaminants like chlorine and hard water minerals can still cause issues like dry skin, hair damage, and respiratory irritation, especially for sensitive individuals.
Why does Helena water make my skin and hair feel dry?
Helena's water is moderately hard, meaning it contains higher levels of dissolved minerals like calcium and magnesium. These minerals, along with chlorine used for disinfection, can strip natural oils from your skin and hair, leading to dryness, dullness, and irritation.
What causes the 'chlorine smell' in my shower water?
The 'chlorine smell' is due to the chlorine used by the city to disinfect the water and kill harmful bacteria. When chlorine reacts with organic matter, it can also form disinfection byproducts (DBPs) which contribute to the odor and can become airborne in shower steam.
Can a shower filter really help with Helena's water?
Yes, a good quality shower filter can significantly improve your showering experience. It can reduce chlorine, chloramine, heavy metals, and other contaminants that contribute to skin dryness, hair damage, and respiratory irritation, leaving your skin and hair feeling softer and healthier.
Does Helena's water affect eczema sufferers?
For individuals with eczema, Helena's hard water and chlorine content can be particularly problematic. These elements can strip the skin's natural barrier, leading to increased dryness, itchiness, and flare-ups, making it essential to take protective measures.
