Last week I watched a woman at Walmart spend a solid three minutes comparing two brands of bottled water, holding them side by side like she was choosing between fine wines. She finally grabbed the one with the sleeker label and a higher price tag. I wanted to tap her on the shoulder and tell her something, but I didn’t. I should have. Because there’s a decent chance both of those bottles were filled with the exact same thing she could get from her kitchen faucet — and the research backs that up.
Nearly two-thirds of bottled water starts at a tap
Here’s the number that changed how I think about bottled water: roughly 64% of bottled water sold in the U.S. is sourced from municipal water systems. Municipal water systems. That’s the same infrastructure that pumps water into your house, your apartment, your office bathroom. The majority of what’s sitting on store shelves in those neat rows of plastic bottles traces back to the same pipes and treatment plants that serve your neighborhood.
The Environmental Working Group (EWG) has been studying bottled water for years, and their findings paint a picture that most people wouldn’t expect. When they tested 10 popular brands, each one contained an average of eight contaminants. We’re talking caffeine, acetaminophen, fertilizer residue, solvents, and chemicals that leach from plastic. Two brands — Walmart’s Sam’s Choice and Giant Food’s Acadia — were particularly bad, with Sam’s Choice exceeding California’s bottled water quality standards in some tests.
So no, the fancy packaging doesn’t mean the water inside is fancy. Often, it’s not even close.
The brands that are basically repackaged tap water
Let’s name names, because that’s really what you came here for. Dasani — one of the most recognizable water brands in the country — sources its water from municipal systems in California, Minnesota, Arizona, Colorado, and Michigan. It’s Coca-Cola’s water brand, and it’s tap water that’s been filtered and repackaged. Lifewtr, made by PepsiCo, does the same thing.
Nestle Pure Life pulls from both wells and municipal sources. Kirkland Signature water, the Costco house brand produced by Niagara Bottling LLC, uses a mix of tap water, well water, and spring water. Propel and Essentia? Also tap water, though they add electrolytes and market themselves toward people who work out. Which, honestly, is kind of a brilliant business move — charge more for tap water with a pinch of minerals and a sports-oriented label.
None of these companies are hiding this information, exactly. But they’re certainly not advertising it on their labels in bold print either. You’d have to dig into fine print or do your own research to figure out where your water actually comes from.
What these companies actually do to the water
To be fair, most bottled water companies don’t just turn on a faucet and start filling bottles. There’s usually some level of processing involved. Reverse osmosis is common. So is ozonation and carbon filtration. These methods remove a lot of impurities and can genuinely improve the taste and safety of the water. Some brands also add minerals back in after filtering — partly for taste, partly so they can market the water as “enhanced” or “purified.”
On the flip side, the level of treatment varies wildly from brand to brand. There’s no universal standard that says “all bottled water must go through X number of filtration steps.” Some companies invest heavily in purification technology. Others do the bare minimum. And because the FDA oversees bottled water (rather than the EPA, which handles tap water), the testing requirements are actually less strict. Tap water gets tested more frequently and is subject to tighter monitoring under the Safe Drinking Water Act.
That’s the part that catches most people off guard. The water from your sink is held to a higher regulatory standard than the water you’re paying two or three dollars for at the gas station.
Most brands fail at basic transparency
The EWG evaluated the top U.S. bottled water brands against three straightforward criteria: Does the label tell you where the water comes from? Does it describe how the water was treated? And does the company publicly share water quality test results? Simple questions. You’d think most brands would have no problem answering them.
Most failed. When the EWG did this evaluation, only three brands earned top marks for transparency: Gerber Pure Purified Water, Nestle Pure Life Purified Water, and Penta Ultra-Purified Water. That’s it. Three. Out of the entire industry. The rest either left out source information, didn’t mention treatment methods, or refused to make their testing data available to the public. Bottled water companies aren’t required to disclose any of this, and so the vast majority simply don’t.
The EWG’s recommendations were direct: companies should label specific water sources and treatment methods, publish accessible water quality reports, and test for unregulated chemicals — including those that might leach from the plastic bottles themselves. Whether the industry will ever adopt these as standard practices is another story entirely.
Microplastics are the other problem nobody talks about
While the tap-water-in-a-bottle issue gets most of the attention, there’s a second concern lurking in the background. A study by Orb Media found that 93% of bottled water samples from around the world contained microplastic particles. Ninety-three percent. These tiny bits of plastic can come from the bottles themselves — the very packaging that’s supposed to keep your water clean and protected.
This is one reason some newer brands have moved away from traditional plastic. In a recent taste test of 22 bottled water brands, the top-ranked water — Path Water — stood out partly because it comes in a refillable aluminum bottle. Just Water, which ranked 7th, uses a recycled plant-based container. These aren’t just marketing gimmicks. When you’re drinking out of plastic, you’re potentially ingesting microplastic fragments with every sip. The packaging matters more than most people realize.
Some brands genuinely taste different (and worse)
One thing I found fascinating was that taste test I mentioned. Allrecipes had a writer sample 22 different bottled water brands, and the results were all over the place. Dasani — the tap-water-sourced Coca-Cola brand — was called out for a “slightly metallic taste.” Essentia had “subtle bitter notes.” Fiji, which markets itself as pristine island water, apparently had a “chemical-like aftertaste.” Trader Joe’s Natural Mountain Spring Water tasted like plastic.
Meanwhile, brands like Summit Spring were praised for tasting “fresh and slightly earthy — almost like drinking really fresh water from a park fountain.” Acqua Panna was described as subtly sweet. Saratoga Springs Water had a “pleasantly soft, refreshing, and minerally flavor.” The Whole Foods store brand, 365 Naturally Alkaline Spring Water, scored 3rd place overall and costs less than most competitors.
So there’s a real irony here. Some of the most expensive and heavily marketed waters taste worse than cheaper alternatives. And several of the tap-water-sourced brands ranked near the bottom. You’d think that, at minimum, repackaged municipal water would taste neutral. Turns out, even that’s not guaranteed — especially when the plastic bottle itself is affecting the flavor.
What to actually do with this information
The EWG’s advice is pretty clear: make filtered tap water your first choice. Buy a decent filter — a Brita pitcher, an under-sink system, whatever fits your budget — and fill a reusable bottle. You’ll save money. You’ll reduce plastic waste. And in many cases, you’ll end up with water that’s been tested more rigorously than anything you could buy at the store.
If you do need to grab a bottle on the go, look for brands that actually tell you where the water comes from and how it was treated. Check whether the company publishes water quality reports. And pay attention to the packaging — aluminum and plant-based containers are generally better bets than standard plastic when it comes to avoiding microplastics and off-flavors. BPA-free plastic is a step up from older bottles, but it’s still plastic.
Also, don’t let the label fool you. Words like “purified,” “enhanced,” and “premium” don’t necessarily mean the water came from a mountain spring or deep aquifer. More often than not, it means someone ran city water through a filter and slapped on a nice label. That’s legal. It’s common. And now you know.
Here’s something to sit with, though: if 64% of bottled water is municipal tap water, that means the remaining 36% comes from springs, wells, and other non-municipal sources. But almost nobody can tell you which brands fall into which category without doing research. The fact that this information is so hard to come by — in an industry worth tens of billions of dollars a year — says something about how the system is designed. It’s not designed for you to know. Maybe it should be.
