Is Naperville, Illinois Shower Water Safe? What's In Your Water (2026)
Khat Cruz
Last updated: April 2026.
Is Naperville, Illinois Shower Water Safe?
Population: 149,540 · Water Source: Lake Michigan (DuPage Water Commission)
For health-conscious residents of Naperville, Illinois, understanding what's in your shower water is crucial for well-being in 2026. While Naperville's drinking water meets safety standards, contaminants present can still impact your skin, hair, and respiratory health during showering.
💧 Where Does Naperville's Water Come From?
Primary Source: Lake Michigan (DuPage Water Commission)
Naperville receives its treated drinking water from Lake Michigan, supplied by the DuPage Water Commission. This surface water source undergoes extensive treatment, including coagulation, filtration, and disinfection, before being distributed to residents.
Treatment: Chloramination
🔬 What's In Naperville's Shower Water?
Here are the key contaminants detected in Naperville'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) | 27.86 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (464x above) |
| Total trihalomethanes (TTHMs) | 43.60 ppb | 80.0 ppb | 0.150 ppb | ⚠️ Exceeds EWG Health Guideline (291x above) |
| Haloacetic acids (HAA5) | 25.76 ppb | 60.0 ppb | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (258x above) |
| Bromodichloromethane | 12.55 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (209x above) |
| Perfluorohexane sulfonate (PFHXS) | 0.0000 ppt | 1e-05 ppt | 0.0000 ppt | ⚠️ Exceeds EWG Health Guideline (147x above) |
| Chromium (hexavalent) | 2.55 ppb | No federal limit | 0.020 ppb | ⚠️ Exceeds EWG Health Guideline (128x above) |
| Dibromochloromethane | 9.00 ppb | No federal limit | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (90x above) |
| Trichloroacetic acid | 7.92 ppb | No federal limit | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (79x above) |
| Dibromoacetic acid | 2.35 ppb | No federal limit | 0.030 ppb | ⚠️ Exceeds EWG Health Guideline (78x above) |
| Chloroform | 25.02 ppb | No federal limit | 0.400 ppb | ⚠️ Exceeds EWG Health Guideline (63x 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: 19.47 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.
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: 28.74 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.
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: 13.61 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.
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: 7.74 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.
Perfluorohexane sulfonate (PFHXS)
The health guideline of 0.001 ppt for perfluorohexane sulfonate was defined by EWG based on studies by Phillipe Grandjean of Harvard University and many other independent researchers who found reduced effectiveness of vaccines and adverse impacts on mammary gland development from exposure to PFOA and PFOS, the two PFAS most widely detected in drinking water. This health guideline harm to the developing immune system.
Comparison: State average: 0.0000 ppt. National average: 0.0000 ppt.
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.
Chromium (hexavalent)
The health guideline of 0.02 ppb for chromium (hexavalent) 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: 0.368 ppb. National average: 0.440 ppb.
Shower Impact: Hexavalent chromium can be absorbed through the skin during bathing, adding to overall exposure beyond 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: 4.25 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.
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: 4.92 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.
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: 0.836 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.
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: 16.22 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.
🧴 How Naperville'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 Naperville's water quality may be affecting you:
🧖 Skin Effects
- Increased dryness and flakiness due to mineral buildup and chloramine exposure.
- Exacerbation of eczema and other sensitive skin conditions.
- Soap scum residue leading to dullness and clogged pores.
- Potential for allergic reactions or irritation from trace metals.
💇 Hair Effects
- Dry, brittle, and damaged hair strands from chloramines and hard water minerals.
- Color fading and dullness, especially for treated hair.
- Residue buildup leading to limpness, lack of shine, and difficulty styling.
- Increased scalp dryness and irritation.
🫁 Respiratory Effects
- Irritation of nasal passages and lungs from inhaled chloramine vapors.
- Potential exacerbation of asthma and allergies due to disinfection byproducts in steam.
- Dryness of mucous membranes from prolonged exposure to shower steam contaminants.
- Chlorine-like smell causing discomfort during showering.
✅ What You Can Do About It
Test Your Water Regularly
A comprehensive water test provides specific data on contaminants in your home's water, allowing you to address precise issues effectively.
Install a Quality Shower Filter
Shower filters can significantly reduce chloramines, disinfection byproducts, and heavy metals, improving water quality for your skin and hair.
Adjust Shower Habits
Taking shorter, cooler showers can minimize exposure to volatilized contaminants and reduce the drying effects of hot water on skin and hair.
Moisturize Immediately After Showering
Applying a good moisturizer to damp skin helps lock in hydration and creates a barrier against environmental stressors after showering.
Consider a Whole-House Water Filter
For comprehensive protection against various contaminants throughout your home, a whole-house filtration system offers broader water quality improvement.
Protect Your Skin & Hair From Naperville's Water
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Related Reading
- why your skin feels dry after showering
- chromium-6 in tap water
- nitrates in tap water
- shower water quality in Joliet, Illinois
- shower water quality in Rockford, Illinois
Is Naperville tap water safe to shower in?
While Naperville's tap water meets federal drinking water standards, contaminants like chloramines, disinfection byproducts, and hard water minerals are present. These can cause skin dryness, hair damage, and respiratory irritation during showering, making it less than ideal for sensitive individuals.
Why does my skin feel dry after showering in Naperville?
Naperville's water contains chloramines, which strip natural oils from your skin, and is moderately hard due to calcium and magnesium. These minerals react with soap to leave residue, contributing to dryness, itchiness, and exacerbated conditions like eczema.
Do shower filters really work for Naperville water?
Yes, many shower filters are effective at reducing chloramines and certain disinfection byproducts, which are key concerns in Naperville's water. Look for filters specifically designed to target these contaminants to improve your showering experience.
What causes the chlorine smell in my Naperville shower?
The smell is primarily due to chloramines, the disinfectant used by the DuPage Water Commission to treat Lake Michigan water. While essential for killing bacteria, chloramines can volatilize in hot shower steam, creating that distinct odor.
How does hard water in Naperville affect my hair?
Hard water minerals, like calcium and magnesium, can build up on your hair strands, making them feel dry, dull, and brittle. This residue can also prevent shampoos and conditioners from working effectively, leading to less vibrant hair color and increased breakage.
