Is Fresno, California Shower Water Safe? What's In Your Water (2026)
Khat Cruz
Last updated: April 2026.
Is Fresno, California Shower Water Safe?
Population: 545,567 · Water Source: Kings River, San Joaquin River, and Groundwater
For residents of Fresno, California, understanding what's in your shower water is crucial for maintaining skin and hair health. While the city's water meets federal safety standards for drinking, the unique blend of disinfectants and minerals can have noticeable impacts on daily showering experiences. Knowing the specific contaminants present empowers you to make informed choices about your household's water quality.
💧 Where Does Fresno's Water Come From?
Primary Source: Kings River, San Joaquin River, and Groundwater
Fresno's water supply is a blend of surface water from the Kings and San Joaquin Rivers and local groundwater. This diverse sourcing helps ensure supply reliability, but also means the water carries characteristics from both river systems and the Central Valley's geological formations. The water undergoes conventional treatment processes, including coagulation, flocculation, sedimentation, filtration, and disinfection.
Treatment: Chloramination, Filtration, Coagulation
🔬 What's In Fresno's Shower Water?
Here are the key contaminants detected in Fresno's water supply based on real testing data from the EWG Tap Water Database:
| Contaminant | Level Found | EPA Limit | EWG Guideline | Status |
|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) | 0.0000 ppt | 1e-05 ppt | 0.0000 ppt | ⚠️ Exceeds EWG Health Guideline (1340x above) |
| Arsenic | 1.87 ppb | 10.0 ppb | 0.0040 ppb | ⚠️ Exceeds EWG Health Guideline (469x above) |
| Haloacetic acids (HAA5) | 35.54 ppb | 60.0 ppb | 0.100 ppb | ⚠️ Exceeds EWG Health Guideline (355x above) |
| Chromium (hexavalent) | 2.33 ppb | No federal limit | 0.020 ppb | ⚠️ Exceeds EWG Health Guideline (117x above) |
| Haloacetic acids (HAA9) | 4.00 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (67x above) |
| Total trihalomethanes (TTHMs) | 8.31 ppb | 80.0 ppb | 0.150 ppb | ⚠️ Exceeds EWG Health Guideline (55x above) |
| Perfluorononanoic acid (PFNA) | 0.0000 ppt | 1e-05 ppt | 0.0000 ppt | ⚠️ Exceeds EWG Health Guideline (31x above) |
| Nitrate | 4.17 ppm | 10.0 ppm | 0.140 ppm | ⚠️ Exceeds EWG Health Guideline (30x above) |
| 1,2-Dibromo-3-chloropropane (DBCP) | 0.043 ppb | 0.2 ppb | 0.0017 ppb | ⚠️ Exceeds EWG Health Guideline (25x above) |
| Bromodichloromethane | 1.36 ppb | No federal limit | 0.060 ppb | ⚠️ Exceeds EWG Health Guideline (23x above) |
Contaminant Details
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.
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: 0.899 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: 35.45 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.
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: 0.812 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.
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: 15.50 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: 27.09 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.
Perfluorononanoic acid (PFNA)
The health guideline of 0.006 ppt for perfluorononanoic acid 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 immune system and harm to fetal growth and child development.
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.
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: 1.21 ppm. National average: 0.824 ppm.
Shower Impact: While primarily a drinking water concern, nitrates can contribute to skin irritation during extended shower exposure.
1,2-Dibromo-3-chloropropane (DBCP)
The health guideline of 0.0017 ppb for 1,2-dibromo-3-chloropropane 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: 0.0009 ppb. National average: 0.0002 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: 5.64 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.
🧴 How Fresno'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 Fresno's water quality may be affecting you:
🧖 Skin Effects
- Dry, itchy skin due to chloramines and hard water minerals stripping natural oils.
- Exacerbation of eczema and other sensitive skin conditions.
- Soap scum residue left on skin, potentially clogging pores.
- Increased risk of irritation from chemical exposure.
💇 Hair Effects
- Dry, brittle, and dull hair.
- Difficulty lathering shampoos, leading to increased product use.
- Color fading in treated hair due to chlorine/chloramine.
- Mineral buildup on hair strands, causing a heavy or greasy feel.
🫁 Respiratory Effects
- Irritation of nasal passages and lungs from inhaled chloramine and DBP vapors.
- Potential trigger for asthma or other respiratory sensitivities in susceptible individuals.
- Increased exposure to volatile organic compounds (VOCs) that off-gas in shower steam.
✅ What You Can Do About It
Test Your Water
A home water test kit can confirm the specific contaminants and hardness levels in your Fresno home's water, providing a personalized understanding of your water quality.
Install a Shower Filter
A quality shower filter can significantly reduce chlorine/chloramine, heavy metals, and other contaminants, leading to softer skin, healthier hair, and less chemical odor.
Limit Shower Time and Temperature
Shorter, cooler showers reduce exposure to steam-borne contaminants and prevent excessive stripping of natural skin and hair oils.
Moisturize Immediately After Showering
Applying a high-quality moisturizer to damp skin helps lock in hydration and create a barrier against environmental irritants, counteracting the drying effects of hard or chlorinated water.
Consider a Whole-House Filter (Long-term)
For comprehensive protection against all contaminants throughout your home, a whole-house filtration system addresses water quality at every tap, including your shower.
Protect Your Skin & Hair From Fresno's Water
The easiest way to remove chlorine, heavy metals, and other contaminants from your shower water.
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Related Reading
- psoriasis triggered by shower water
- chromium-6 in tap water
- THMs in your shower water
- shower water quality in Anaheim, California
- shower water quality in Bakersfield, California
Is Fresno tap water safe to shower in?
Yes, Fresno's tap water meets all federal drinking water safety standards, making it generally safe for showering. However, the presence of disinfectants like chloramine, hard minerals, and other detectable contaminants can still impact your skin, hair, and respiratory health, especially for sensitive individuals.
Why does my skin feel dry and itchy after showering in Fresno?
The dryness and itchiness are likely due to the chloramines used for disinfection and the high mineral content (hardness) in Fresno's water. These substances can strip your skin of its natural protective oils and leave a residue, leading to irritation and discomfort.
Does Fresno's hard water damage hair?
Yes, Fresno's very hard water can damage hair over time. Minerals like calcium and magnesium build up on hair strands, making it dull, brittle, and difficult to manage, while also preventing shampoos from lathering effectively and potentially fading hair color.
Can a shower filter really help with Fresno's water?
Absolutely. A good quality shower filter is designed to reduce common contaminants like chloramines, heavy metals, and some disinfection byproducts. This can lead to noticeable improvements in skin hydration, hair softness, and a reduction in chemical odors in your shower steam.
Are there any respiratory concerns from showering in Fresno's water?
Yes, inhaling steam from hot showers can expose you to volatile compounds like chloramines and disinfection byproducts (DBPs). For sensitive individuals, this can potentially irritate the respiratory tract or exacerbate existing conditions like asthma.
