Fresno Tap Water
Water provider: City of Fresno Water Division (Fresno, CA)
Our recommendation
Premium filter strongly recommended
Your water has contaminants that require stronger filtration (heavy metals, PFAS, or limits exceeded). Reverse osmosis is the recommended tier.
See recommended water filters →What is in the water
Nitrates
DetectedCommon in agricultural areas from fertiliser runoff. Particularly dangerous for infants.
Central Valley groundwater systems are routinely monitored for nitrate loading.
Arsenic
DetectedNaturally occurring heavy metal. Long-term exposure linked to cancer and cardiovascular disease.
EWG lists arsenic among common Fresno-area groundwater contaminants.
Chromium-6 (hexavalent chromium)
DetectedIndustrial contaminant. Known human carcinogen. Unregulated at the federal level in the US.
Chromium-6 remains a common California groundwater contaminant of concern.
PFAS (forever chemicals)
Not reportedPer- and polyfluoroalkyl substances. Bioaccumulate in the body. Linked to cancer, immune effects, and hormone disruption.
Verify the current EWG PFAS indicator on the utility page. Automation could not retrieve the live indicator behind Cloudflare.
Source
Data from the EWG Tap Water Database, City of Fresno Water Division (2024). Last reviewed 2026-05-25.
Note: Contaminant levels vary by address (older plumbing can leach lead even when the source water does not), sampling location, and time of year. The figures above reflect utility-wide averages from the most recent public report. If you have specific health concerns, request a full report from your utility or test your own tap water.