Does Waterloo Sparkling Water Have PFAS?

No peer-reviewed study has singled out Waterloo Sparkling Water for PFAS testing and published brand-specific results in the scientific literature. That does not mean the water is PFAS-free. Research on carbonated and bottled beverages consistently shows that PFAS contamination in any packaged drink is driven overwhelmingly by the source water used during production, with packaging playing a smaller but measurable secondary role. Because Waterloo has not publicly released third-party PFAS testing data, consumers are left to evaluate the brand through the lens of what the science says about sparkling water in general.

Source Water Is the Biggest Factor

The single best predictor of how much PFAS ends up in a finished beverage is the water supply where it was made. A 2025 study in Environmental Science & Technology examined PFAS concentrations in popular beverages, including beers brewed at different facilities across the United States. The total PFAS in the beverages correlated strongly with the PFAS levels in the local municipal drinking water. For PFOA specifically, the correlation between the local tap water and the finished product was strikingly tight.¹ While that study focused on beer, the principle applies to any water-based beverage: if the production facility sits in a county with elevated PFAS in its water supply, the product absorbs that contamination.

Waterloo Sparkling Water is produced in the United States and uses purified municipal water as its base. The company has not disclosed which specific purification technologies it applies or where all of its production facilities draw water. That gap matters because different U.S. water systems vary enormously in PFAS levels. Some municipal supplies have total PFAS well below a few parts per trillion, while others, particularly those near military bases, airports, or industrial sites that historically used firefighting foam, carry concentrations many times higher.

Can a Beverage Maker Remove PFAS During Production?

Technically, yes. Reverse osmosis is the most effective commercially available method for stripping PFAS of various chain lengths from water. Activated carbon filtration and anion exchange resins also work, but they have a significant blind spot: short-chain PFAS compounds, especially short-chain carboxylic acids like PFBA and PFPeA, pass through these filters much more easily than their longer-chain relatives.² Reverse osmosis handles both short and long chains far better, but it is expensive to operate and generates large volumes of waste concentrate that itself must be dealt with.³

Whether a sparkling water brand invests in reverse osmosis or relies on cheaper carbon filtration makes a real difference in what ends up in the can. Major brands that market themselves on purity sometimes use multi-stage treatment including reverse osmosis, but many simply use standard carbon filtration, which leaves short-chain PFAS largely intact. Without transparency from Waterloo about its specific treatment process, there is no way to know where it falls on that spectrum.

Packaging Adds a Small but Real Contribution

Waterloo sells its sparkling water in aluminum cans, and the interior of most aluminum beverage cans is lined with a thin polymer coating to prevent the metal from reacting with the drink. Research on beverage packaging has found that aluminum cans contribute a modest amount of PFAS to their contents. In testing across different packaging types, aluminum cans showed average PFAS migration of about 9 parts per trillion into the liquid, far less than paper-based containers like cups or cartons, which leached roughly four to five times more.⁴ PET plastic bottles came in even lower, around 5 parts per trillion.

So the aluminum can itself is unlikely to be a major PFAS source for Waterloo drinkers. The packaging contribution is small compared to what the source water can deliver. Still, it is not zero, and for someone trying to minimize every possible route of exposure, it is worth knowing that the can lining is a potential, if minor, contributor.

The Short-Chain Problem

One reason PFAS contamination in drinking water and beverages is so stubborn is the shift in industrial chemistry over the past two decades. As regulators cracked down on long-chain PFAS compounds like PFOA and PFOS, manufacturers switched to shorter-chain replacements. These shorter molecules are harder to filter out of water, move faster through soil into groundwater, and are extremely persistent once they reach the environment.⁵ The result is a kind of whack-a-mole situation: the compounds most commonly found in modern water supplies are also the ones hardest to remove using standard treatment.

This matters for sparkling water consumers because even a brand that filters its water through activated carbon may still deliver short-chain PFAS to you. The compounds slip right through. European drinking water monitoring has found that ultra-short-chain PFAS, particularly trifluoroacetic acid, can push total PFAS concentrations past regulatory guidelines even when the better-known legacy compounds are below detection limits.⁶ Testing for these ultra-short-chain compounds requires specialized analytical methods that most routine water quality reports do not include, which means they can fly under the radar even in water systems that technically meet current U.S. standards.

Testing Gaps Make It Hard to Know What You Are Drinking

A big part of the frustration around PFAS in beverages is the mismatch between what people want to know and what testing can reliably tell them. Standard EPA methods for drinking water PFAS analysis target a defined list of compounds, mostly the well-studied ionic PFAS. But there is a whole category of neutral PFAS, including volatile precursors that can break down into the persistent compounds people worry about, that conventional methods miss. Researchers in South Korea recently developed a more sensitive technique specifically designed to detect these neutral PFAS in bottled and sparkling water. When they applied it, they found consistent detection of specific neutral PFAS across all commercial water products tested, including sparkling waters.⁷

The takeaway is not that sparkling water is uniquely contaminated. It is that the standard tests most brands rely on when they claim their product is “PFAS-free” or “below detectable limits” may simply not be looking for every form of PFAS that could be present. A brand can pass standard compliance testing and still contain compounds that more advanced methods would pick up. This is the state of the science right now: the analytical tools are still catching up to the chemistry.

Why PFAS in Beverages Matters for Your Health

Even at the trace concentrations typically found in packaged beverages, PFAS exposure adds up over time because these compounds accumulate in the body and are cleared very slowly. Epidemiological research has linked PFAS exposure to effects on the immune system, thyroid function, liver health, cholesterol levels, insulin regulation, kidney function, and certain cancers.⁸ These associations come from populations with higher-than-average exposures, but the concern is that there does not appear to be a clear safe threshold below which PFAS cause no harm.

Drinking water is one of the primary routes through which PFAS enter the bloodstream. A study of Southern California adults found that people whose public water supply had detectable PFAS had meaningfully higher blood levels of these compounds. For PFHxS, a commonly detected PFAS, serum levels were roughly 32% higher among people whose water supply showed any detection compared to those without detectable levels. When looking at post-treatment drinking water data specifically, the differences were even starker, with PFHxS blood levels about 80% higher.⁹

Other research has found that even low concentrations in water, in the single-digit parts per trillion range, can produce measurable increases in blood PFAS over time.¹⁰ For someone drinking several cans of sparkling water daily, the cumulative intake from that source alone could be nontrivial, especially if the brand’s source water has even moderate PFAS contamination.

What You Can Actually Do About It

If you drink Waterloo or any other sparkling water regularly and want to reduce your PFAS exposure, the most direct step is to look for brands that publish third-party PFAS test results, ideally using methods that screen for a broad panel of compounds rather than just the handful the EPA currently regulates. Some brands have begun doing this in response to consumer pressure. Waterloo, as of the information available, has not made such testing publicly accessible.

Another approach is to make your own sparkling water at home using a countertop carbonation device and filtered tap water. Research on communities with PFAS-contaminated water supplies has found that people who drank filtered tap water had roughly 22 to 31% lower PFAS blood levels compared to those drinking unfiltered tap, depending on the specific compound.¹¹ That said, ordinary pitcher-style carbon filters are better at catching long-chain PFAS than short-chain ones. A reverse osmosis system under the kitchen sink is more thorough but costs more to install and maintain.

For people who prefer the convenience of canned sparkling water, choosing brands that source water from areas with low PFAS contamination or that use reverse osmosis treatment is the best available strategy. Unfortunately, figuring out which brands meet those criteria requires detective work that most consumers should not have to do. The beverage industry has been slow to adopt the kind of routine, comprehensive PFAS testing and public disclosure that would let people make genuinely informed choices.

The Waste Problem Behind the Treatment

Even when PFAS are successfully removed from water, they do not disappear. Activated carbon and ion exchange resins trap the compounds, but then you have contaminated filter media that must go somewhere. These spent materials are often sent to specialized incineration facilities, though there is growing concern about whether incineration fully destroys PFAS or simply transforms them into other fluorinated byproducts that re-enter the environment. Emerging destruction technologies are being developed, but none are yet proven at large scale with certainty.¹²

This creates an uncomfortable reality for the entire bottled and sparkling water industry. The more aggressively a company filters PFAS from its source water, the more contaminated waste it generates. The operational costs are significant, and the regulatory framework for managing that waste is still evolving. It is one reason many beverage makers have been reluctant to adopt the most effective treatment methods, and why the burden of avoiding PFAS exposure continues to fall largely on individual consumers rather than on the companies producing these drinks.

Does Carbonation Itself Affect PFAS Levels?

A question that comes up often is whether the carbonation process, dissolving carbon dioxide under pressure into water, somehow introduces or concentrates PFAS. There is no published evidence that carbonation itself adds PFAS to water. CO₂ used in food-grade carbonation is typically sourced from industrial processes and purified to food safety standards, and it is not a known vector for PFAS contamination. The sparkling water in your can contains PFAS for the same reason any other packaged water-based drink might: because the water going into the production line already contained them, or because a small amount migrated from the packaging.

That said, the lower pH of carbonated water compared to still water could theoretically affect migration rates from can linings, since slightly acidic environments can accelerate leaching of some chemicals from polymeric coatings. Whether this effect is large enough to matter for PFAS specifically at the pH levels found in sparkling water has not been rigorously studied. It remains a plausible but unquantified concern.

How Sparkling Water Compares to Tap Water

People sometimes assume that bottled or canned sparkling water must be cleaner than their home tap water, but that assumption does not hold up consistently. European monitoring data has shown that even treated drinking water from surface sources can exceed certain PFAS guidelines once ultra-short-chain compounds are included in the calculation.⁶ But the same is true for bottled products: they start from a municipal or well water source, apply some level of treatment, and package the result. Whether the final product is better or worse than your home tap depends entirely on the specific source water, the treatment applied, and your own municipal supply.

In some cases, a well-run municipal treatment plant with granular activated carbon and advanced oxidation processes delivers cleaner water than a bottled product that relies on simpler filtration. In other cases, particularly in areas with known PFAS contamination from local industry or military operations, bottled water from a distant, cleaner source is a meaningful improvement. There is no universal answer, which is exactly why transparency from both municipal utilities and beverage brands matters so much. Until companies like Waterloo voluntarily publish comprehensive PFAS testing data, consumers are left guessing about whether the premium they pay for canned sparkling water buys them any real reduction in exposure.