Spokane, Washington Tap Water Quality Report
Serving utility: City of Spokane
Updated March 2026 • Data from EWG Tap Water Database & EPA SDWIS
High Priority Concerns
Spokane tap water has 13 contaminants exceeding EWG health guidelines, including Arsenic, Total PFOS and PFOA, Radon. Additionally, 12 known or suspected carcinogens were detected, including Arsenic, Total trihalomethanes (TTHMs), Chromium (hexavalent).
Water Provider Information
Contaminants Detected
| Contaminant | Detected Level | EWG Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Arsenic carcinogen | 3.19 ppb | 0.00 ppb | 10 ppb | Above guideline |
| Total PFOS and PFOA | 5.05 ppt | 0.01 ppt | No legal limit | Above guideline |
| Radon | 398 pCi/L | 1.50 pCi/L | No legal limit | Above guideline |
| Total trihalomethanes (TTHMs) carcinogen | 2.19 ppb | 0.15 ppb | 80 ppb | Above guideline |
| Chromium (hexavalent) carcinogen | 0.26 ppb | 0.02 ppb | No legal limit | Above guideline |
| Nitrate carcinogen | 1.72 ppm | 0.14 ppm | 10 ppm | Above guideline |
| Haloacetic acids (HAA9) carcinogen | 0.56 ppb | 0.06 ppb | No legal limit | Above guideline |
| Nitrate and nitrite carcinogen | 1.23 ppm | 0.14 ppm | 10 ppm | Above guideline |
| Bromodichloromethane carcinogen | 0.47 ppb | 0.06 ppb | No legal limit | Above guideline |
| Dibromochloromethane carcinogen | 0.72 ppb | 0.10 ppb | No legal limit | Above guideline |
| Perfluorooctanoic acid (PFOA) carcinogen | 0.41 ppt | 0.09 ppt | 4 ppt | Above guideline |
| Perfluorooctane sulfonate (PFOS) carcinogen | 1.33 ppt | 0.30 ppt | 4 ppt | Above guideline |
| Radium, combined (-226 and -228) | 0.16 pCi/L | 0.05 pCi/L | 5 pCi/L | Above guideline |
| Antimony | 0.47 ppb | 1 ppb | 6 ppb | Below guideline |
| Barium | 19.70 ppb | 700 ppb | 2,000 ppb | Below guideline |
| Bromoform carcinogen | 0.35 ppb | 0.50 ppb | No legal limit | Below guideline |
| Chlorate | 1.31 ppb | 210 ppb | No legal limit | Below guideline |
| Chlorodifluoromethane | 0.01 ppb | N/A | No legal limit | Below guideline |
| Chloroform carcinogen | 0.23 ppb | 0.40 ppb | No legal limit | Below guideline |
| Molybdenum | 0.73 ppb | 40 ppb | No legal limit | Below guideline |
| PFOS + PFOA + PFHxS + PFNA | 5.05 ppt | N/A | No legal limit | Below guideline |
| Perfluorobutane sulfonate (PFBS) | 0.73 ppt | 2,000 ppt | No legal limit | Below guideline |
| Perfluorohexanoic Acid (PFHxA) | 0.54 ppt | 1,000 ppt | No legal limit | Below guideline |
| Perfluoropentanoic Acid (PFPeA) | 0.57 ppt | 1,000 ppt | No legal limit | Below guideline |
| Strontium | 0.10 ppb | 1,500 ppb | No legal limit | Below guideline |
| Vanadium | 0.18 ppb | 21 ppb | No legal limit | Below guideline |
Health Context
Arsenic carcinogen
Long-term exposure increases risk of skin cancer, bladder cancer, and lung cancer; chronic exposure causes neurological effects and cardiovascular disease.
Total PFOS and PFOA
Exposure to elevated levels of this contaminant may pose health risks. See EWG and EPA guidelines for more information.
Radon
Radon is a radioactive gas that accumulates in lungs over time, significantly increasing lung cancer risk, particularly in smokers and former smokers with prolonged exposure.
Total trihalomethanes (TTHMs) carcinogen
Exposure to elevated levels of this contaminant may pose health risks. See EWG and EPA guidelines for more information.
Chromium (hexavalent) carcinogen
Exposure to elevated levels of this contaminant may pose health risks. See EWG and EPA guidelines for more information.
Recommended Filtration for This Water
Echo RO System
Reverse osmosis filtration removes up to 99.9% of contaminants including heavy metals, PFAS, disinfection byproducts, and more. The gold standard for drinking water purification.
View RO SystemsEcho Whole-Home Filter
Filters water at every tap in your home. Reduces chlorine, VOCs, and disinfection byproducts from your shower, bath, and kitchen water.
View Whole-Home FiltersEcho Hydrogen Water Flask
Once your water is clean, supercharge it. Molecular hydrogen is the smallest, most bioavailable antioxidant — shown to reduce inflammation, boost energy, and support cellular health.
Shop Hydrogen FlaskFrequently Asked Questions
Is Spokane tap water safe to drink?
Spokane tap water meets EPA legal standards for drinking water. However, 13 contaminants exceed stricter EWG health guidelines, and 12 known carcinogens were detected. While legally compliant, additional filtration is recommended for optimal safety.
What contaminants are in Spokane water?
A total of 26 contaminants were detected in Spokane tap water, including Arsenic, Total PFOS and PFOA. Of these, 13 exceed EWG health guidelines.
What's the best water filter for Spokane?
For Spokane tap water, we recommend a reverse osmosis (RO) system for drinking water — it removes up to 99.9% of contaminants including heavy metals, PFAS, and disinfection byproducts. For shower and bath water, a whole-home filtration system reduces chlorine and volatile organics.
Where does Spokane get its water?
Spokane tap water is provided by City of Spokane, serving approximately 343,167 people. For detailed source water information, contact your local utility or visit the EPA's SDWIS database.
Nearby City Water Reports
Data sources: Environmental Working Group (EWG) Tap Water Database, U.S. EPA Safe Drinking Water Information System (SDWIS)
Last updated: March 2026
Methodology: Contaminant levels are compared against both EPA legal limits (Maximum Contaminant Levels) and EWG health guidelines, which are often stricter and based on the latest scientific research.
