PFAS in Northern Virginia Water: What Homeowners Should Know

Fairfax Water's own testing shows PFAS levels in some of their Occoquan Reservoir sources exceeding EPA's new federal standards. If you get water from the Occoquan treatment plants — which includes most homes in Fairfax, Vienna, Reston, and Burke — you're drinking water that currently contains PFOA and PFOS above 4 parts per trillion.

Here's what that means for your family, what Fairfax Water is doing about it, and what you can control right now.

What Are PFAS and Why Do They Matter?

PFAS stands for per- and polyfluoroalkyl substances. They're called "forever chemicals" because they don't break down naturally — not in the environment, not in your body. They've been used since the 1940s in everything from non-stick cookware to firefighting foam to food packaging.

The two PFAS compounds getting the most attention are PFOA and PFOS. The EPA set maximum contaminant levels (MCLs) of 4 parts per trillion for each. That's incredibly small — like finding 4 seconds in 32,000 years.

Studies link PFAS exposure to increased risk of certain cancers, liver damage, decreased fertility, and increased risk of high cholesterol. The science is still developing, but there's enough evidence for EPA to regulate them.

Northern Virginia's PFAS Reality

Fairfax Water operates two main treatment systems: the Occoquan plants and the Corbalis plant on the Potomac River. Right now, the Potomac source meets EPA standards. The Occoquan source does not.

If you live in western Fairfax County — areas like McLean, Tysons, and Falls Church — you likely get Potomac River water that already meets the new standards. But most of Fairfax County gets Occoquan water.

Fairfax Water isn't hiding this. They publish their PFAS data online and send annual water quality reports. They're investing $389 million over six years to install treatment systems that will bring all sources into compliance by the 2029 federal deadline.

Virginia passed HB 2050, effective July 2025, creating the Occoquan Reservoir PFAS Reduction Program. This adds state-level requirements on top of federal ones.

What You Can Do Right Now

You don't have to wait until 2029. Water filtration systems can remove PFAS from your drinking water today.

Under-sink reverse osmosis is the gold standard for PFAS removal. Look for systems certified to NSF 53 or NSF 58 standards. These remove 95% or more of PFOA and PFOS.

We install under-sink RO systems that fit in most kitchen cabinets. They treat water at the point of use — your drinking water faucet — so you get maximum protection where it matters most.

Whole-house carbon filtration helps with taste, odor, and chloramines, but it's less effective specifically for PFAS removal. Carbon filters can reduce some PFAS, but they don't achieve the removal rates of reverse osmosis.

The Real Numbers

Fairfax Water's latest testing shows PFOA levels up to 5.9 parts per trillion and PFOS up to 8.4 parts per trillion at some Occoquan sources. The EPA standard is 4 parts per trillion for each.

These aren't emergency levels. You're not going to get sick from drinking this water short-term. But if you're concerned about long-term exposure — especially if you have young children or are pregnant — point-of-use filtration gives you control.

A quality under-sink RO system costs $800 to $1,500 installed. Filter replacements run $150 to $200 per year. Compare that to buying bottled water for drinking and cooking, and it pays for itself in 12 to 18 months.

What We Tell Our Customers

We've been installing water treatment systems in Northern Virginia homes for over two decades. When customers ask about PFAS, we give them the same straight answer we'd give our own families.

The science on PFAS health effects is still developing, but the trend is toward stricter regulation, not looser. EPA's 4 parts per trillion standard is extremely conservative — lower than many states had set on their own.

If you're thinking about home filtration, focus on what you want to achieve. Better taste? Reduced chloramine smell? Protection against potential contaminants? Match the technology to your goals.

For PFAS specifically, reverse osmosis is the answer. For overall water quality improvement, we might recommend a different approach based on your home's specific water conditions and your family's needs.

Don't Panic, But Stay Informed

Fairfax Water provides safe drinking water. Their PFAS investment shows they're taking this seriously. The 2029 compliance timeline gives them adequate time to design and build effective treatment systems.

But you have options now. Whether that's installing an under-sink filter, switching to bottled water for drinking, or simply staying informed about the timeline — you don't have to wait for the utility to act.

If you're ready to explore water treatment options for your home, we can walk you through what makes sense for your situation and budget. We install systems, but we won't sell you one unless it actually solves your problem.

Contact Pioneer Plumbers to discuss water filtration solutions that fit your Northern Virginia home. We'll test your water, explain your options, and install systems that work for the long term.