Covina, California Tap Water Quality Report
Serving utility: Covina Irrigating Company
Updated March 2026 • Data from EWG Tap Water Database & EPA SDWIS
High Priority Concerns
Covina tap water has 15 contaminants exceeding EWG health guidelines, including Arsenic, Perfluorohexane sulfonate (PFHXS), Haloacetic acids (HAA5). Additionally, 13 known or suspected carcinogens were detected, including Arsenic, Haloacetic acids (HAA5), Total trihalomethanes (TTHMs).
Water Provider Information
Contaminants Detected
| Contaminant | Detected Level | EWG Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Arsenic carcinogen | 1.97 ppb | 0.00 ppb | 10 ppb | Above guideline |
| Perfluorohexane sulfonate (PFHXS) | 0.47 ppt | 0.00 ppt | 10 ppt | Above guideline |
| Haloacetic acids (HAA5) carcinogen | 36.20 ppb | 0.10 ppb | 60 ppb | Above guideline |
| Total trihalomethanes (TTHMs) carcinogen | 23.20 ppb | 0.15 ppb | 80 ppb | Above guideline |
| Dibromoacetic acid | 2.92 ppb | 0.03 ppb | No legal limit | Above guideline |
| Bromodichloromethane carcinogen | 5.24 ppb | 0.06 ppb | No legal limit | Above guideline |
| Dibromochloromethane carcinogen | 5.29 ppb | 0.10 ppb | No legal limit | Above guideline |
| Dichloroacetic acid carcinogen | 5.68 ppb | 0.20 ppb | No legal limit | Above guideline |
| Chloroform carcinogen | 9.98 ppb | 0.40 ppb | No legal limit | Above guideline |
| Trichloroacetic acid carcinogen | 1.98 ppb | 0.10 ppb | No legal limit | Above guideline |
| Perfluorooctanoic acid (PFOA) carcinogen | 1.45 ppt | 0.09 ppt | 4 ppt | Above guideline |
| Perfluorooctane sulfonate (PFOS) carcinogen | 4.28 ppt | 0.30 ppt | 4 ppt | Above guideline |
| Bromoform carcinogen | 2.69 ppb | 0.50 ppb | No legal limit | Above guideline |
| Uranium carcinogen | 1.80 pCi/L | 0.43 pCi/L | 20 pCi/L | Above guideline |
| Nitrate carcinogen | 0.43 ppm | 0.14 ppm | 10 ppm | Above guideline |
| Aluminum | 26.50 ppb | 600 ppb | No legal limit | Below guideline |
| Barium | 66.50 ppb | 700 ppb | 2,000 ppb | Below guideline |
| Fluoride | 0.26 ppm | N/A | 4 ppm | Below guideline |
| Monobromoacetic acid | 0.33 ppb | 25 ppb | No legal limit | Below guideline |
| Monochloroacetic acid | 0.07 ppb | 53 ppb | No legal limit | Below guideline |
| Perchlorate | 0.45 ppb | 1 ppb | No legal limit | Below guideline |
| Perfluorobutane sulfonate (PFBS) | 1 ppt | 2,000 ppt | 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.
Perfluorohexane sulfonate (PFHXS)
Exposure to elevated levels of this contaminant may pose health risks. See EWG and EPA guidelines for more information.
Haloacetic acids (HAA5) carcinogen
Exposure to elevated levels of this contaminant may pose health risks. See EWG and EPA guidelines for more information.
Total trihalomethanes (TTHMs) 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
Echo RO System
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Filters water at every tap in your home. Reduces chlorine, VOCs, and disinfection byproducts from your shower, bath, and kitchen water.
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Shop Hydrogen FlaskFrequently Asked Questions
Is Covina tap water safe to drink?
Covina tap water meets EPA legal standards for drinking water. However, 15 contaminants exceed stricter EWG health guidelines, and 13 known carcinogens were detected. While legally compliant, additional filtration is recommended for optimal safety.
What contaminants are in Covina water?
A total of 22 contaminants were detected in Covina tap water, including Arsenic, Perfluorohexane sulfonate (PFHXS). Of these, 15 exceed EWG health guidelines.
What's the best water filter for Covina?
For Covina 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 Covina get its water?
Covina tap water is provided by Covina Irrigating Company, serving approximately 369,059 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.
