The labels on bottled water are not random. "Spring," "purified," "distilled," and "mineral" are legal categories the FDA defines under its Standards of Identity, and each one tells you something real about where the water came from and how it was treated. That matters for PFAS, because whether a bottle carries forever chemicals depends almost entirely on the source water and the treatment, not on the pretty mountain on the label.
Here is the short version: distilled and reverse-osmosis purified water are the least likely to contain PFAS, because the processes that make them physically strip the chemicals out. Spring and mineral water depend entirely on their source. Now the details.
The FDA's bottled water standards spell out exactly what a company can call its product:
So "purified" and "distilled" describe a treatment that removes things. "Spring" and "mineral" describe a source and tell you very little about treatment.
PFAS are a family of synthetic chemicals that resist breaking down, which is why they earned the "forever chemicals" name. The treatments that produce purified water happen to be the same ones that remove PFAS:
That is why a bottle labeled "purified by reverse osmosis" or "distilled" is your safest bet if PFAS is your main worry. The treatment is doing the work regardless of how contaminated the original source was.
Spring and mineral water are a different story. If the underground source is clean, the water is clean. If the aquifer happens to sit near a contamination plume, the PFAS can ride along, because the light treatment used for spring and mineral water is not designed to remove dissolved synthetic chemicals. There is nothing inherently dangerous about spring water, it just inherits whatever its source carries.
The numbers are more reassuring than the headlines suggest. When the FDA tested 197 bottled water samples, 10 had detectable PFAS, but none exceeded the EPA's tap-water limits. For context, the EPA finalized those limits in 2024 at 4 parts per trillion each for PFOA and PFOS, and 10 parts per trillion for several other PFAS compounds.
One caveat worth knowing: the FDA does not yet have its own PFAS standard for bottled water. By law, the FDA sets bottled water limits to match the EPA once the EPA regulates a contaminant in tap water, and that process is still working through the system. So today, bottled water is not independently tested against a PFAS standard the way your local utility soon will be. That is an argument for choosing a treatment-defined product (distilled or purified) when PFAS is your concern, rather than trusting source-defined labels alone.
Mineral water gets marketed as the healthy premium choice, and the minerals it contains, calcium and magnesium mostly, are not bad for you. But minerals and PFAS safety are two separate questions. A mineral water can be rich in calcium and still carry trace PFAS if its source is affected. Do not let "natural minerals" on the front read as "clean of contaminants."
If you want minerals and PFAS protection, the cleaner path is distilled or RO water plus a normal diet, since food, not water, is where most people get their calcium and magnesium anyway.
PFAS is not the only invisible passenger in bottled water. Researchers have repeatedly found microplastics in bottled water, often at higher counts than in tap water, partly because the plastic bottle and cap shed particles over time, especially when bottles sit in heat. A 2024 study using a new imaging technique found that a liter of bottled water can carry hundreds of thousands of nanoplastic particles, far more than older methods detected. The health effects are still being studied, but it is a reason not to assume "bottled" automatically means "purer than tap."
Treatment type affects taste, too. Distilled water tastes flat to many people because the minerals that give water its character are gone. Spring and mineral water taste rounder for the same reason. There is nothing wrong with preferring the taste of spring water, just separate that preference from a safety claim. If you like the mouthfeel of mineral water but want PFAS protection, you can filter your own tap water and add a pinch of mineral drops, getting the taste and the treatment in one shot.
One more practical note on labels: a brand can switch its source water without changing its branding. The smart habit is to look for brands that publish recent, third-party water-quality reports rather than relying on the category word alone. If a company will not show you test data, that silence is information.
It depends on your goal:
You can compare home options on our reverse osmosis guide and our PFAS filter page, and dig into specific brands on the bottled water hub and our PFAS in bottled water breakdown. To see whether PFAS has been detected in your own tap water first, start at the Know Your Exposure homepage.
### Does distilled water have PFAS? Distilled water is among the least likely bottled waters to contain PFAS. Distillation boils water into steam and leaves PFAS behind in the boiling chamber, so the condensed water that ends up in the bottle is largely free of these chemicals. Reverse-osmosis purified water performs similarly well.
### Is spring water free of PFAS? Not necessarily. Spring water's purity depends entirely on its underground source, and the light treatment used does not remove dissolved PFAS. If the spring's aquifer is near contamination, the water can carry PFAS. Look for brands that publish independent testing showing non-detect results.
### What is the difference between purified and spring water? "Purified" describes treatment, water cleaned by distillation, deionization, or reverse osmosis to meet a pharmacopeia standard. "Spring" describes a source, water that flows naturally from an underground formation. Purified water is more aggressively cleaned and therefore lower risk for PFAS; spring water reflects whatever its source contains.
### Is mineral water better for you than purified water? Mineral water contains calcium, magnesium, and other minerals that are fine to consume, but those minerals do not make it safer from PFAS, which depends on the source. Most people get plenty of minerals from food. If your priority is avoiding contaminants, purified or distilled water is the safer pick.
### Does bottled water get tested for PFAS? The FDA has tested bottled water samples and found PFAS in a small fraction, none above EPA tap-water limits, but it does not yet have a dedicated PFAS standard for bottled water. That standard is being developed to match the EPA's 2024 drinking-water limits. For now, treatment-defined waters like distilled and purified offer the most consistent protection.
### Is reverse osmosis the same as purified water? Reverse osmosis is one of the methods the FDA allows for producing purified water, alongside distillation and deionization. A bottle labeled "purified by reverse osmosis" has been pushed through a fine membrane that removes 95 to 99 percent of PFAS, so it qualifies as both RO and purified.
Your next step: pick up the bottle you usually buy and read the category word on the front, spring, purified, distilled, or mineral. If it is source-defined (spring or mineral) and PFAS is your concern, check whether the brand publishes test results, or switch to a distilled or RO product. To know whether you even need to worry based on your local supply, look up your area on the Know Your Exposure homepage.