Americans spent over $19 billion on bottled water in 2023, making it the best-selling packaged beverage in the country. The implicit assumption: bottled water is safer than tap. But is that actually true?
The Regulatory Gap
Here's the surprising reality: tap water in the U.S. is more strictly regulated than bottled water.
- Tap water is regulated by the EPA under the Safe Drinking Water Act. Utilities must test frequently (some contaminants daily), report results annually in Consumer Confidence Reports, notify customers within 24 hours of acute health violations, and meet legally enforceable Maximum Contaminant Levels.
- Bottled water is regulated by the FDA as a packaged food product. The FDA sets standards that are "at least as protective" as the EPA's, but the testing frequency, public disclosure requirements, and enforcement are significantly weaker.
Specifically: bottled water companies are not required to notify consumers of violations. A water utility that exceeds an MCL must alert customers immediately. A bottled water company can quietly recall a product.
The 40% Rule
Multiple studies, including a landmark NRDC analysis, found that approximately 40% of bottled water is simply municipal tap water, often treated further but sometimes not. Major brands including Aquafina (PepsiCo) and Dasani (Coca-Cola) are purified tap water. This is legal and disclosed in fine print, but rarely prominently labeled.
What the Testing Shows
The most thorough independent study of bottled water, the EWG 2008 bottled water report, tested 10 brands and found:
- 38 different contaminants detected across 10 brands
- Contaminants included disinfection byproducts, nitrates, arsenic, and caffeine
- 2 brands had contaminant levels that exceeded California state limits
More recently, researchers have found microplastics in bottled water at levels 10–100x higher than in tap water. A 2024 study in PNAS found approximately 240,000 plastic particles per liter in some brands, a growing area of concern with uncertain health implications.
PFAS in Bottled Water
The EPA's PFAS MCLs (4 ppt for PFOA and PFOS) apply only to public water systems, not bottled water. The FDA has not finalized equivalent limits. Consumer Reports testing found PFAS in several major bottled water brands. Until the FDA acts, bottled water has less PFAS oversight than your tap.
The Cost Math
Tap water costs roughly $0.001–$0.002 per gallon in most U.S. cities. Bottled water averages $1.22 per liter, about $4.62 per gallon. That's a 2,000–3,000x price premium. A family that drinks one case of bottled water per week spends roughly $700–$900 per year.
When Bottled Water Makes Sense
- During boil-water notices or confirmed utility failures
- When traveling to areas with unsafe tap water
- Immediately after discovering elevated lead before a filter is installed
The Better Alternative
For most Americans, the best choice is filtered tap water: safer than most bottled water, far cheaper, and dramatically lower in plastic waste. Check your tap water quality at SafeWater → and see our filter guide → to find the right filtration for your specific contaminants.