Toledo, Ohio Tap Water Quality Report
Serving utility: City of Toledo
Updated March 2026 • Data from EWG Tap Water Database & EPA SDWIS
High Priority Concerns
Toledo tap water has 14 contaminants exceeding EWG health guidelines, including Total trihalomethanes (TTHMs), Haloacetic acids (HAA9), Bromodichloromethane. Additionally, 12 known or suspected carcinogens were detected, including Total trihalomethanes (TTHMs), Haloacetic acids (HAA9), Bromodichloromethane.
Water Provider Information
Contaminants Detected
| Contaminant | Detected Level | EWG Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Total trihalomethanes (TTHMs) carcinogen | 42.30 ppb | 0.15 ppb | 80 ppb | Above guideline |
| Haloacetic acids (HAA9) carcinogen | 15.30 ppb | 0.06 ppb | No legal limit | Above guideline |
| Bromodichloromethane carcinogen | 10 ppb | 0.06 ppb | No legal limit | Above guideline |
| Haloacetic acids (HAA5) carcinogen | 10.90 ppb | 0.10 ppb | 60 ppb | Above guideline |
| Dibromoacetic acid | 2.28 ppb | 0.03 ppb | No legal limit | Above guideline |
| Chloroform carcinogen | 25 ppb | 0.40 ppb | No legal limit | Above guideline |
| Dibromochloromethane carcinogen | 6.13 ppb | 0.10 ppb | No legal limit | Above guideline |
| Dichloroacetic acid carcinogen | 6.66 ppb | 0.20 ppb | No legal limit | Above guideline |
| Chromium (hexavalent) carcinogen | 0.22 ppb | 0.02 ppb | No legal limit | Above guideline |
| Trichloroacetic acid carcinogen | 0.85 ppb | 0.10 ppb | No legal limit | Above guideline |
| Nitrate carcinogen | 0.96 ppm | 0.14 ppm | 10 ppm | Above guideline |
| Nitrate and nitrite carcinogen | 0.97 ppm | 0.14 ppm | 10 ppm | Above guideline |
| Bromoform carcinogen | 1.22 ppb | 0.50 ppb | No legal limit | Above guideline |
| Chlorite | 65.50 ppb | 50 ppb | 1,000 ppb | Above guideline |
| Chlorate | 68.10 ppb | 210 ppb | No legal limit | Below guideline |
| Fluoride | 0.95 ppm | N/A | 4 ppm | Below guideline |
| Manganese | 0.48 ppb | 100 ppb | No legal limit | Below guideline |
| Molybdenum | 1.77 ppb | 40 ppb | No legal limit | Below guideline |
| Monochloroacetic acid | 1.79 ppb | 53 ppb | No legal limit | Below guideline |
| Perfluorobutanoic Acid (PFBA) | 5 ppt | 1,000 ppt | No legal limit | Below guideline |
| Strontium | 0.14 ppb | 1,500 ppb | No legal limit | Below guideline |
| Vanadium | 0.67 ppb | 21 ppb | No legal limit | Below guideline |
Health Context
Total trihalomethanes (TTHMs) carcinogen
Exposure to elevated levels of this contaminant may pose health risks. See EWG and EPA guidelines for more information.
Haloacetic acids (HAA9) carcinogen
Exposure to elevated levels of this contaminant may pose health risks. See EWG and EPA guidelines for more information.
Bromodichloromethane carcinogen
Bromodichloromethane is a trihalomethane (THM) disinfection byproduct that damages liver and kidneys with chronic exposure. EPA classifies it as a probable human carcinogen based on animal carcinogenicity data.
Haloacetic acids (HAA5) carcinogen
Exposure to elevated levels of this contaminant may pose health risks. See EWG and EPA guidelines for more information.
Dibromoacetic acid
Exposure to elevated levels of this contaminant may pose health risks. See EWG and EPA guidelines for more information.
Recommended Filtration for This Water
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Shop Hydrogen FlaskFrequently Asked Questions
Is Toledo tap water safe to drink?
Toledo tap water meets EPA legal standards for drinking water. However, 14 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 Toledo water?
A total of 22 contaminants were detected in Toledo tap water, including Total trihalomethanes (TTHMs), Haloacetic acids (HAA9). Of these, 14 exceed EWG health guidelines.
What's the best water filter for Toledo?
For Toledo 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 Toledo get its water?
Toledo tap water is provided by City of Toledo, serving approximately 480,000 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.
