Is Charleston, South Carolina Shower Water Safe? What's In Your Water (2026)
Khat Cruz
Is Charleston, South Carolina Shower Water Safe?
Population: 150,277 · Water Source: Edisto River, Bushy Park Reservoir
For health-conscious consumers, parents, and those with sensitive skin in Charleston, South Carolina, understanding your shower water quality in 2026 is crucial. While Charleston's drinking water meets federal standards, what's in your shower can still impact your skin, hair, and respiratory health, making it essential to be informed.
💧 Where Does Charleston's Water Come From?
Primary Source: Edisto River, Bushy Park Reservoir
Charleston's primary water supply originates from the Edisto River, a blackwater river, and the Bushy Park Reservoir, which supplements the supply. The water undergoes extensive treatment at the Hanahan Water Treatment Plant, including coagulation, sedimentation, filtration, and disinfection, before being distributed to homes and businesses.
Treatment: Coagulation, sedimentation, filtration, chloramination
🔬 What's In Charleston's Shower Water?
Here are the key contaminants detected in Charleston'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) | 16.67 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (278x above) |
| Haloacetic acids (HAA5) | 11.41 ppb | 60.0 ppb | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (114x above) |
| Dibromoacetic acid | 1.73 ppb | No federal limit | 0.030 ppb | ⚠️ Exceeds EWG Health Guideline (58x above) |
| Total trihalomethanes (TTHMs) | 8.43 ppb | 80.0 ppb | 0.150 ppb | ⚠️ Exceeds EWG Health Guideline (56x above) |
| Bromodichloromethane | 2.84 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (47x above) |
| Dichloroacetic acid | 8.99 ppb | No federal limit | 0.200 ppb | ⚠️ Exceeds EWG Health Guideline (45x above) |
| Dibromochloromethane | 1.59 ppb | No federal limit | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (16x above) |
| Perfluorooctanoic acid (PFOA) | 0.0000 ppt | 4e-06 ppt | 0.0000 ppt | ⚠️ Exceeds EWG Health Guideline (11x above) |
| Chloroform | 4.00 ppb | No federal limit | 0.400 ppb | ⚠️ Exceeds EWG Health Guideline (10x above) |
| Perfluorooctane sulfonate (PFOS) | 0.0000 ppt | 4e-06 ppt | 0.0000 ppt | ⚠️ Exceeds EWG Health Guideline (5x 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: 23.17 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: 16.94 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.
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: 0.445 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.
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: 24.99 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: 5.41 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.
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: 9.77 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.
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: 1.77 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.
Perfluorooctanoic acid (PFOA)
The health guideline of 0.09 ppt for PFOA was defined by 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 Harm to the immune system; harm to fetal growth and child development; increased cholesterol.
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.
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: 17.37 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.
Perfluorooctane sulfonate (PFOS)
The health guideline of 0.3 ppt for PFOS 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 cardiovascular harm and harm to fetal growth.
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.
🧴 How Charleston'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 Charleston'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 leading to clogged pores and dull complexion.
- Potential irritation or allergic reactions from disinfection byproducts.
💇 Hair Effects
- Dry, brittle, and damaged hair texture.
- Fading of hair color and chemical treatments.
- Mineral buildup causing dullness and lack of shine.
- Increased frizz and difficulty styling.
🫁 Respiratory Effects
- Inhalation of chloramine and disinfection byproducts in steam.
- Irritation of nasal passages and throat.
- Potential trigger for asthma or allergy symptoms.
- Dryness of mucous membranes.
✅ What You Can Do About It
Test Your Home's Water
A comprehensive water test provides specific data on contaminants in your Charleston home's water, helping you identify targeted solutions.
Install a High-Quality Shower Filter
A good shower filter can significantly reduce chlorine, chloramine, and other contaminants, leading to noticeable improvements in skin and hair health.
Limit Shower Time and Temperature
Shorter, cooler showers reduce exposure to steam-borne contaminants and prevent excessive stripping of natural skin oils.
Moisturize Immediately After Showering
Applying moisturizer to damp skin helps lock in hydration and creates a barrier against environmental stressors and dryness.
Consider a Whole-House Filtration System
For comprehensive protection against contaminants throughout your entire home, a whole-house system offers the most thorough treatment.
Protect Your Skin & Hair From Charleston's Water
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Related Reading
Is Charleston tap water safe to shower in?
While Charleston's tap water meets EPA drinking water standards, it contains disinfectants like chloramine and their byproducts which can impact skin, hair, and respiratory health during showering. For sensitive individuals, these levels might still cause discomfort or exacerbate conditions like eczema.
Why does my skin feel dry after showering in Charleston?
The dryness is often due to chloramine, which strips natural oils from your skin, and the presence of hardness minerals (calcium and magnesium) in Charleston's water. These minerals can leave a residue that clogs pores and prevents moisturizers from fully absorbing, contributing to that tight, dry feeling.
Can Charleston's hard water damage my hair?
Yes, Charleston's moderately hard water can cause mineral buildup on your hair, making it feel dull, brittle, and difficult to manage. Over time, this can lead to breakage, color fading, and reduced effectiveness of hair products.
Are shower filters effective for Charleston water?
Yes, shower filters are highly effective, particularly for reducing chlorine and chloramine, which are major contributors to skin and hair issues in Charleston. They can also help reduce certain heavy metals and sediment, leading to softer skin, shinier hair, and less respiratory irritation.
What specific contaminants should I be most concerned about in my Charleston shower?
For showering, the primary concerns in Charleston are chloramine and its disinfection byproducts (like TTHMs and HAA5s), due to their inhalation and skin absorption. Hardness minerals are also a significant factor for aesthetic issues like dry skin and hair damage.
