Is Knoxville, Tennessee Shower Water Safe? What's In Your Water (2026)
Khat Cruz
Last updated: April 2026.
Is Knoxville, Tennessee Shower Water Safe?
Population: 195,524 · Water Source: Tennessee River, Fort Loudoun Lake
Knoxville, Tennessee, draws its tap water from the pristine Tennessee River and Fort Loudoun Lake, undergoing rigorous treatment to ensure safety. However, for health-conscious consumers, parents, and those with sensitive skin or hair, understanding what's truly in your shower water is crucial for optimizing well-being.
💧 Where Does Knoxville's Water Come From?
Primary Source: Tennessee River, Fort Loudoun Lake
Knoxville's drinking water primarily originates from the Tennessee River and Fort Loudoun Lake, managed by Knoxville Utilities Board (KUB). This surface water undergoes a multi-stage treatment process at the Mark B. Whitaker Water Treatment Plant, including coagulation, flocculation, sedimentation, filtration, and disinfection, before distribution to homes and businesses.
Treatment: Conventional treatment (coagulation, flocculation, sedimentation, filtration), followed by chloramination for disinfection.
🔬 What's In Knoxville's Shower Water?
Here are the key contaminants detected in Knoxville's water supply based on real testing data from the EWG Tap Water Database:
| Contaminant | Level Found | EPA Limit | EWG Guideline | Status |
|---|---|---|---|---|
| Haloacetic acids (HAA9) | 57.93 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (965x above) |
| Haloacetic acids (HAA5) | 35.80 ppb | 60.0 ppb | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (358x above) |
| Total trihalomethanes (TTHMs) | 51.27 ppb | 80.0 ppb | 0.150 ppb | ⚠️ Exceeds EWG Health Guideline (342x above) |
| Bromodichloromethane | 15.01 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (250x above) |
| Trichloroacetic acid | 17.30 ppb | No federal limit | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (173x above) |
| Chloroform | 35.79 ppb | No federal limit | 0.400 ppb | ⚠️ Exceeds EWG Health Guideline (89x above) |
| Dichloroacetic acid | 17.82 ppb | No federal limit | 0.200 ppb | ⚠️ Exceeds EWG Health Guideline (89x above) |
| Dibromochloromethane | 8.19 ppb | No federal limit | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (82x above) |
| Dibromoacetic acid | 1.84 ppb | No federal limit | 0.030 ppb | ⚠️ Exceeds EWG Health Guideline (61x above) |
| Nitrate | 0.943 ppm | 10.0 ppm | 0.140 ppm | ⚠️ Exceeds EWG Health Guideline (7x above) |
Contaminant Details
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: 28.44 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.
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: 21.53 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: 30.36 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.
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: 3.91 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.
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: 10.46 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.
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: 17.68 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.
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: 9.66 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.
Dibromochloromethane
The health guideline of 0.1 ppb for dibromochloromethane 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: 0.768 ppb. National average: 3.55 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.
Dibromoacetic acid
The health guideline of 0.03 ppb for dibromoacetic acid was defined by as . This health guideline protects against cancer and harm to fetal growth and development.
Comparison: State average: 0.116 ppb. National average: 1.13 ppb.
Shower Impact: Contaminants in shower water can be absorbed through the skin and inhaled as steam, increasing your daily exposure beyond what you get from drinking water alone.
Nitrate
The health guideline of 0.14 ppm for nitrate was defined in a peer-reviewed scientific study by EWG and corresponds to one-in-one-million annual cancer risk level.
Comparison: State average: 0.560 ppm. National average: 0.824 ppm.
Shower Impact: While primarily a drinking water concern, nitrates can contribute to skin irritation during extended shower exposure.
🧴 How Knoxville'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 Knoxville's water quality may be affecting you:
🧖 Skin Effects
- Increased dryness and irritation, especially for eczema sufferers
- Worsening of skin conditions like acne and rashes
- Residue buildup leading to dullness and clogged pores
- Premature aging due to oxidative stress from chlorine/chloramine
💇 Hair Effects
- Excessive dryness and brittleness, leading to breakage
- Fading of dyed hair color and dull appearance
- Mineral buildup, making hair feel heavy and greasy
- Difficulty in lathering shampoos and conditioners effectively
🫁 Respiratory Effects
- Irritation of nasal passages and airways from inhaled chloramine and DBPs
- Exacerbation of asthma and allergy symptoms due to steam and chemical vapors
- Coughing or shortness of breath for sensitive individuals
- General discomfort from strong chemical odors in the shower
✅ What You Can Do About It
Test Your Water Annually
Understanding the specific contaminants and their levels in your home's water allows for targeted solutions. Water quality can vary by neighborhood and plumbing age.
Install a Quality Shower Filter
A good shower filter can significantly reduce chloramine, heavy metals, and other contaminants, protecting your skin and hair from harsh chemicals.
Limit Shower Duration and Temperature
Shorter, cooler showers can reduce exposure to volatile chemicals like TTHMs and minimize skin and hair drying effects.
Moisturize Immediately After Showering
Applying a high-quality moisturizer to damp skin helps lock in hydration and creates a protective barrier against external irritants.
Rinse Hair Thoroughly
Ensure all shampoo and conditioner is rinsed out to prevent residue buildup, which can be exacerbated by hard water minerals.
Protect Your Skin & Hair From Knoxville's Water
The easiest way to remove chlorine, heavy metals, and other contaminants from your shower water.
Shop Afina Filtered Showerheads →🛒 Recommended Products for Knoxville Residents
Afina Filtered Showerhead
15-stage filtered showerhead that removes chlorine, heavy metals, and other contaminants while providing great water pressure.
✨ All-in-one solution — filters water and gives you a premium shower experience
Shop Now →Afina Shower Filter
Universal shower filter that attaches to any existing showerhead. Removes chlorine, chloramine, and sediment.
✨ Keep your current showerhead and add powerful filtration
Shop Now →Afina Replacement Filter
Replacement filter cartridge for Afina shower filters. Lasts up to 6 months or 10,000 gallons.
✨ Easy replacement every 2-3 months to maintain peak filtration
Shop Now →❓ Frequently Asked Questions
Related Reading
- why your skin feels dry after showering
- nitrate contamination in water
- hexavalent chromium in water
- shower water quality in Memphis, Tennessee
- shower water quality in Nashville, Tennessee
Is Knoxville tap water safe to shower in?
Knoxville's tap water meets all federal safety standards for drinking, making it generally safe for showering. However, contaminants like chloramine and hardness can still negatively impact skin, hair, and respiratory health, especially for sensitive individuals.
Why does my skin feel dry and itchy after showering in Knoxville?
The presence of chloramine, a disinfectant, and moderate water hardness in Knoxville's water can strip natural oils from your skin. These factors contribute to dryness, irritation, and can worsen conditions like eczema or sensitive skin.
Does Knoxville water contain chlorine, and can I smell it in my shower?
Knoxville Utilities Board (KUB) uses chloramine, a stable form of chlorine, for disinfection. While chloramine has less odor than free chlorine, sensitive individuals may still detect a chemical smell, especially in hot shower steam where it can volatilize.
What is water hardness, and how does it affect my shower experience in Knoxville?
Water hardness refers to the concentration of dissolved minerals like calcium and magnesium, which are present in Knoxville's water. Hard water reduces soap lather, leaves mineral buildup on skin and hair, and can contribute to dryness and dullness.
Are shower filters effective against Knoxville's water contaminants?
Yes, high-quality shower filters are very effective at reducing common Knoxville water contaminants like chloramine, heavy metals, and sediment. They can significantly improve skin hydration, hair texture, and reduce respiratory irritation from chemical vapors.
