What's in Centreville, VA tap water?
Centreville is supplied by Fairfax Water from the Occoquan Reservoir and the Potomac. The contaminants that most exceed EWG's health guidelines in that system are hexavalent chromium and disinfection byproducts, with total PFAS also over.
Zip codes covered: 20120, 20121 and surrounding Centrevilleareas. “× over” compares the detected level to EWG's health guideline, not the federal legal limit.
8 PFAS “forever chemicals” found in Centreville, VA's water
The EPA's most recent national testing round detected PFAS in Fairfax County Water Authority's supply. The EPA's 2024 legal limit for PFOA and PFOS is just 4 ppt, and its own health goal is zero, no level is considered safe. Here, PFOA and PFOS were detected above that 4 ppt federal limit.
Reverse osmosis is independently rated the most effective way to remove PFAS at the tap.
See the fixSource: EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR5), highest detected result per compound for Fairfax County Water Authority. Levels vary by sampling point and date. Learn more about PFAS.
How to get Centreville water off that list
Here is the good news: everything above comes out at your kitchen tap. Fairfax Water treats the water for the whole Centreville system, but a reverse osmosis system finishes the job at your sink, catching what city treatment leaves behind. The Sanavia Hydra fits under a standard Centreville sink and is NSF-certified to cut chromium-6 (hexavalent) and the rest by up to 99%.
Centreville water quality FAQ
Is Centreville, VA tap water safe to drink?
Fairfax Water water meets all federal EPA legal limits. However, independent EWG testing finds 4 contaminants above its stricter health-based guidelines, including Chromium-6 (hexavalent) and Total trihalomethanes (TTHMs). Legal compliance and health-optimal water are not the same thing.
What contaminants are in Centreville water?
The most notable contaminants above EWG health guidelines are Chromium-6 (hexavalent), Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Total PFAS. These are largely disinfection byproducts and trace metals common to the region's water sources.
Does a reverse osmosis system remove these contaminants?
Yes. A reverse osmosis system like the Sanavia Hydra uses a 0.0001-micron membrane plus multi-stage carbon filtration, NSF-certified to reduce every contaminant class detected in Centreville water, at your tap, regardless of what the utility does upstream.
The contaminants flagged in Centreville water
Plain-English guides to what Fairfax Watertesting turns up above EWG's health guidelines — what each one is, and what actually removes it.