Is Dover, Delaware Shower Water Safe? What's In Your Water (2026)
Khat Cruz
Is Dover, Delaware Shower Water Safe?
Population: 39,403 · Water Source: Groundwater (Piney Point and Cheswold Aquifers)
For health-conscious residents and parents in Dover, Delaware, understanding what's in your shower water is crucial for well-being. While your tap water meets federal drinking standards, contaminants present can still impact skin, hair, and respiratory health, making it essential to be informed about your daily shower.
💧 Where Does Dover's Water Come From?
Primary Source: Groundwater (Piney Point and Cheswold Aquifers)
Dover's municipal water supply draws from a network of wells tapping into the deep Piney Point and Cheswold Aquifers. This groundwater is naturally filtered through geological layers but can pick up minerals and naturally occurring elements. The City of Dover Water Department operates and maintains this system.
Treatment: Aeration, Filtration, Chlorination, pH Adjustment
🔬 What's In Dover's Shower Water?
Here are the key contaminants detected in Dover's water supply based on real testing data from the EWG Tap Water Database:
| Contaminant | Level Found | EPA Limit | EWG Guideline | Status |
|---|---|---|---|---|
| Radium, combined (-226 and -228) | 6.16 pCi/L | 5.0 pCi/L | 0.050 pCi/L | 🚨 ABOVE EPA LIMIT (123x above) |
| Total trihalomethanes (TTHMs) | 41.65 ppb | 80.0 ppb | 0.150 ppb | ⚠️ Exceeds EWG Health Guideline (278x above) |
| Haloacetic acids (HAA9) | 14.80 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (247x above) |
| Arsenic | 0.904 ppb | 10.0 ppb | 0.0040 ppb | ⚠️ Exceeds EWG Health Guideline (226x above) |
| Haloacetic acids (HAA5) | 15.46 ppb | 60.0 ppb | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (155x above) |
| Bromodichloromethane | 6.46 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (108x above) |
| Chloroform | 29.36 ppb | No federal limit | 0.400 ppb | ⚠️ Exceeds EWG Health Guideline (73x above) |
| Trichloroacetic acid | 7.16 ppb | No federal limit | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (72x above) |
| Nitrate | 5.83 ppm | 10.0 ppm | 0.140 ppm | ⚠️ Exceeds EWG Health Guideline (42x above) |
| Nitrate and nitrite | 5.83 ppm | 10.0 ppm | 0.140 ppm | ⚠️ Exceeds EWG Health Guideline (42x above) |
Contaminant Details
Radium, combined (-226 and -228)
The health guideline of for radium, combined (-226 and -228) was defined by the California Office of Environmental Health Hazard Assessment as . This health guideline protects against cancer.
Comparison: State average: 1.69 pCi/L. National average: 0.332 pCi/L.
Shower Impact: Radioactive contaminants can become aerosolized in shower steam and inhaled, adding to overall exposure.
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: 31.65 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 (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: 26.79 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: 0.151 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: 16.79 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: 6.33 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.
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: 20.90 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.
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: 7.71 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.
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: 2.54 ppm. National average: 0.824 ppm.
Shower Impact: While primarily a drinking water concern, nitrates can contribute to skin irritation during extended shower exposure.
Nitrate and nitrite
The health guideline of 0.14 ppm for nitrate and nitrite was defined by based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. . This health guideline protects against one-in-one-million annual cancer risk level.
Comparison: State average: 2.37 ppm. National average: 0.780 ppm.
Shower Impact: While primarily a drinking water concern, nitrates can contribute to skin irritation during extended shower exposure.
🧴 How Dover'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 Dover's water quality may be affecting you:
🧖 Skin Effects
- Dryness and irritation (chlorine, hard water)
- Exacerbation of eczema and sensitive skin conditions
- Reduced effectiveness of soaps and shampoos
- Potential for rashes from chemical exposure
💇 Hair Effects
- Dull, brittle, and tangled hair (hard water, chlorine)
- Increased hair breakage and frizz
- Color fading in dyed hair
- Residue buildup making hair feel 'gummy' or heavy
🫁 Respiratory Effects
- Irritation of nasal passages and lungs (chlorine, TTHMs)
- Exacerbation of asthma and allergies from inhaled chemicals
- Headaches or dizziness from chemical vapors
- General respiratory discomfort during and after showering
✅ What You Can Do About It
Test Your Shower Water
A home water test kit or professional analysis can provide precise data on contaminants specific to your home's water, empowering informed decisions.
Install a Quality Shower Filter
A good shower filter can significantly reduce chlorine, chloramines, heavy metals, and other contaminants, protecting your skin, hair, and lungs.
Limit Shower Time and Temperature
Shorter, cooler showers reduce the amount of time you're exposed to steam-borne chemicals and can help preserve skin's natural oils.
Moisturize Immediately After Showering
Applying moisturizer to damp skin within minutes of showering helps lock in hydration and counteracts the drying effects of hard or chlorinated water.
Consider a Whole-House Filter
For comprehensive protection against contaminants throughout your home, a whole-house filtration system treats all water entering your residence.
Protect Your Skin & Hair From Dover's Water
The easiest way to remove chlorine, heavy metals, and other contaminants from your shower water.
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Related Reading
Is Dover tap water safe to shower in?
While Dover's tap water meets federal drinking water standards, it still contains contaminants like chlorine and hard minerals that can affect sensitive skin, hair, and respiratory health during showering. For health-conscious individuals, further filtration is often desired.
Why does my skin feel dry and itchy after showering in Dover?
Dover's water contains chlorine, which strips natural oils from your skin, and is moderately hard, leaving behind mineral residues. Both contribute to dryness, irritation, and can exacerbate conditions like eczema, making your skin feel tight and itchy.
Can a shower filter really make a difference for my hair in Dover?
Absolutely. Shower filters reduce chlorine and hard water minerals that cause hair to become dry, brittle, and dull. By filtering these out, your hair can retain more moisture, feel softer, and show improved shine and manageability.
Are there specific contaminants in Dover's water that become airborne during a shower?
Yes, chlorine and its byproducts like Trihalomethanes (TTHMs) readily volatilize in hot shower water. These chemicals can be inhaled as steam, potentially causing respiratory irritation and contributing to overall chemical exposure.
How often should I replace my shower filter in Dover?
The replacement frequency depends on the filter type, your water usage, and the level of contaminants in Dover's water. Generally, most shower filters require replacement every 3 to 6 months to maintain optimal performance and contaminant reduction.
