Last updated: April 2026.
🚿 Oregon Shower Water Quality Report (2026)
Comprehensive analysis of Oregon water quality across 3 cities • Based on real EWG testing data • Updated 2026
If you live in Oregon, you may be showering in water that contains contaminants exceeding health guidelines — and you might not even know it. Our analysis of water quality data across 3 Oregon cities reveals 8 contaminants that may exceed EWG health guidelines.
Oregon faces unique water quality challenges including wildfire-related water quality impacts and lead in older buildings. Whether you're in Salem or elsewhere in the state, understanding what's in your shower water is the first step toward protecting your skin and hair.
📊 Oregon Water Quality at a Glance
Across Oregon, we analyzed water quality data from the Environmental Working Group (EWG) database. The results show that Oregon residents may be exposed to a range of contaminants through their shower water — many at levels that exceed health guidelines set by the EWG, which are often stricter than federal legal limits.
⚠️ Top Contaminants Found in Oregon Water
Based on EWG data analysis, here are the most significant contaminants detected in Oregon water supplies:
| Contaminant | Avg. Level | EWG Guideline | Status |
|---|---|---|---|
| Haloacetic acids (HAA9) | 26.83 ppb | 0.0600 ppb | ⚠️ 447.1x above |
| Haloacetic acids (HAA5) | 17.41 ppb | 0.1000 ppb | ⚠️ 174.1x above |
| Arsenic | 0.6522 ppb | 0.0040 ppb | ⚠️ 163.0x above |
| Total trihalomethanes (TTHMs) | 20.01 ppb | 0.1500 ppb | ⚠️ 133.4x above |
| Radium, combined (-226 and -228) | 1.1000 pCi/L | 0.0500 pCi/L | ⚠️ 22.0x above |
| Chromium (hexavalent) | 0.0807 ppb | 0.0200 ppb | ⚠️ 4.0x above |
| Nitrate | 0.1928 ppm | 0.1400 ppm | ⚠️ 1.4x above |
| Chlorate | 212.38 ppb | 210.00 ppb | ⚠️ 1.0x above |
Haloacetic acids (HAA9)
The health guideline of 0.06 ppb for haloacetic acids (HAA9) was defined by EWG . This health guideline protects against cancer.
National Average: 23.70 ppb | Oregon Average: 26.83 ppb
Haloacetic acids (HAA5)
The health guideline of 0.1 ppb for haloacetic acids (HAA5) was established. This health guideline protects against cancer.
National Average: 19.82 ppb | Oregon Average: 17.41 ppb
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.
National Average: 0.6242 ppb | Oregon Average: 0.6522 ppb
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.
National Average: 29.06 ppb | Oregon Average: 20.01 ppb
🏙️ City-by-City Water Quality in Oregon
We've analyzed water quality in 3 Oregon cities. Click on any city to see its detailed water quality report:
| City | Contaminants Found | Above EWG Guidelines |
|---|---|---|
| Portland | 15 | 6 |
| Eugene | 12 | 6 |
| Salem | 15 | 5 |
🩺 Health Effects of Oregon Water Contaminants
The contaminants found in Oregon water may be associated with various health concerns. When you shower, your skin — your body's largest organ — can absorb these substances, and you may inhale steam containing volatile compounds.
🧴 Skin & Hair
🫁 Respiratory
- Steam inhalation of chlorine/VOCs
- May aggravate asthma symptoms
- Potential respiratory irritation
⚕️ Long-Term Concerns
- Disinfection byproduct exposure
- Eczema flare-ups
- Cumulative contaminant absorption
🛡️ How to Protect Yourself from Oregon Water Contaminants
The good news: you don't have to accept whatever comes out of your Oregon showerhead. A quality shower filter can significantly reduce many of the contaminants found in your water.
Key contaminants a shower filter can help address:
- Haloacetic acids (HAA9) — learn about health effects and removal
- Arsenic — learn about health effects and removal
- Total trihalomethanes (TTHMs) — learn about health effects and removal
- Chromium (hexavalent) — learn about health effects and removal
Additionally, understanding common symptoms can help you identify water quality issues:
💧 Recommended Shower Filtration for Oregon
Based on Oregon's water quality profile, we recommend a multi-stage filtration system. Afina's shower filters use KDF-55 and activated carbon to target chlorine, heavy metals, and other common contaminants found in Oregon water.
Afina Filtered Showerhead
Multi-stage filter built right into a high-pressure showerhead. No adapters needed.
Shop Now →Afina Shower Filter
Attach between your pipe and any showerhead. KDF-55 + activated carbon filtration.
Shop Now →Replacement Filter
Keep your filtration fresh. Replace every 2-3 months for optimal contaminant removal.
Shop Now →❓ Frequently Asked Questions
Is Oregon tap water safe to shower in?
While Oregon tap water meets federal legal standards (MCLs), our analysis found 8 contaminants exceeding stricter EWG health guidelines. Federal limits don't always reflect the latest health research, so many health-conscious residents choose to add shower filtration for an extra layer of protection.
What contaminants are in Oregon water?
Based on EWG data, Oregon water contains up to 19 detected contaminants. The most notable include Haloacetic acids (HAA9), Haloacetic acids (HAA5), Arsenic. Oregon faces specific challenges with wildfire-related water quality impacts and lead in older buildings.
Does Oregon have hard water?
Oregon water tends to be on the softer side, though mineral levels can vary by municipality. Even soft water may contain other contaminants of concern.
Do I need a shower filter in Oregon?
Given that Oregon water contains contaminants above EWG health guidelines, a shower filter may help reduce your exposure to chlorine, heavy metals, and disinfection byproducts. This is especially important if you experience dry skin, itchy scalp, or hair issues after showering.
How does Oregon water compare to the national average?
Oregon is in the Pacific Northwest region and faces water quality challenges common to the area, including wildfire-related water quality impacts and lead in older buildings. Some contaminants may be above national averages depending on your specific city and water source.
Data sourced from the Environmental Working Group (EWG) Tap Water Database. This report is for informational purposes only and does not constitute medical advice. Water quality can vary by neighborhood and season. Last updated: March 2026.
