Both are regulated, just by different agencies. Here is who checks what, how to read the report your utility sends every July, and when buying bottles is genuinely worth it for your family.
What to remember
- The EPA regulates public tap water under the Safe Drinking Water Act and sets legal limits on more than 90 contaminants; the FDA regulates bottled water.
- Your water utility must send a Consumer Confidence Report every year by July 1 showing where your water comes from and what was found in it.
- US children drink an average of 23 ounces of plain water a day, so bottled water for everyday use adds up fast; tap in reusable bottles costs far less.
- Keep bottled water on hand for utility notices, advisories and emergencies, and follow your water system’s instructions when one is issued.
- Fluoridated tap water reduces cavities by about 25 percent in children and adults; the recommended fluoride level is 0.7 milligrams per liter.
Water is one of the few things every person in your house consumes every day, and federal survey data show that children and teens in the United States drink an average of 23 ounces of plain water daily. That makes the bottled versus tap question a real household decision, not a trivia question. Both are regulated, just by different agencies, and only one of them comes with a free annual report spelling out exactly what is in it.
Who Regulates Tap Water and Who Regulates Bottled Water
Tap water from a public system answers to the EPA under the Safe Drinking Water Act, which Congress passed in 1974. The EPA sets legal limits on more than 90 contaminants and also sets the testing schedules and methods water systems must follow. States can take over setting and enforcing their own standards as long as they are at least as strict as the national ones.
The EPA also publishes secondary standards for 15 chemicals that affect taste, color or smell rather than health. Utilities are not required to meet those, which is one reason tap water can taste different from town to town without being unsafe.
Bottled water plays by a different rulebook. The FDA regulates it, and the agency requires bottlers to shield their sources from germs and chemicals, run their own tests and follow additional safety rules. So both options are regulated; the agency, the rules and the paperwork behind them are not the same.
How to Read Your Local Water Quality Report
Public water systems owe their customers a water quality report once a year, and the EPA requires it to arrive by July 1. It is called a Consumer Confidence Report, and it should reach you in the mail or be posted online. It covers three things: where your tap water comes from, the levels of germs and chemicals found during the year, and the health risks of drinking water that contains them.
Three terms make the report much easier to parse:
- Contaminant. Anything in your water other than water molecules themselves. The word sounds alarming, but contaminants can be good or bad depending on the substance and the amount. Utilities often add low levels of chlorine to kill germs, so chlorine shows up in the table even though it protects you.
- Source water. The rivers, streams, lakes, reservoirs, springs or groundwater that supply your tap.
- Violation. Any occasion when your utility fell short of safe drinking water standards or broke the EPA’s rules.
Not everyone gets a copy automatically. If you live in an apartment, condo or rental where a management company pays the water bill, check the utility’s website or ask your landlord or building manager. You also will not receive a report if your water comes from a hospital, school or campground with its own system.
Parent tip: Questions after reading the report? Contact your water utility, your health department, or the EPA’s Drinking Water Hotline at 800-426-4791.
What Bottled Water Costs a Family Per Year
Start with the average: 23 ounces a day per child adds up quickly, and a household with two or three kids goes through a lot of drinking water over a year, before anyone fills a pot for pasta.
Single-serve bottled water costs far more per gallon than the tap water already piped into your kitchen, so switching the family’s daily drinking water to cases of bottles turns a bill you already pay into a separate line in the grocery budget. Tap water in reusable bottles covers school lunches, practice and car rides just as well.
If you keep bottled water on hand anyway, larger containers usually cost less per gallon than single-serve bottles. Stocking up in bulk has its own pitfalls, though; our guide to mistakes to avoid when buying household goods in bulk covers the common ones.
When Bottled Water Makes Sense
Utilities have to notify customers when tap water falls short of EPA standards. When a notice arrives, or when an advisory follows a broken water main, bottled water is the straightforward short-term answer while you follow your water system’s instructions. Advisories and violations also have to be recorded in the Consumer Confidence Report tables using specific EPA language, so the record sticks around.
Bottled water earns its place outside emergencies too. A stored supply makes sense as part of a household emergency kit, and travel, sports tournaments and long car trips are all easier with bottles packed.
If your report raises a concern you do not fully understand, or you worry about lead in your water, call your water utility or your health department instead of guessing. Officials can tell you what applies to your home and which steps actually help.
Do You Need a Home Water Filter?
Maybe, but decide from data, not packaging. Your Consumer Confidence Report tells you which germs and chemicals were actually found in your water and at what levels, so read it before spending money.
A few principles help:
- Taste complaints point to secondary standards. If your only gripe is flavor, smell or color, the report may reflect one of the 15 aesthetic chemicals the EPA treats as guidelines rather than health rules. Filters aimed at taste usually cost less than those built for specific contaminants.
- Match the filter to the contaminant. If the report lists something at a level that concerns you, look for a filter certified to reduce that specific contaminant rather than a vague general claim.
- Maintenance is part of the purchase. A filter performs only if you replace cartridges on the schedule the manufacturer sets.
Decoding filter marketing is a skill in itself. We break down similar label terms in our air purifier glossary and our guide to sunscreen terms, and the pattern is the same: defined, regulated terms carry weight, and vague ones do not.
Tap vs. Bottled Water Side by Side
| Question | Tap Water | Bottled Water |
|---|---|---|
| Who regulates it | The EPA under the Safe Drinking Water Act; states may enforce standards at least as strict | The FDA, which requires source protection, testing and other safety rules |
| How you know what is in it | Annual Consumer Confidence Report, delivered by July 1 | Whatever the company states on the label or its website |
| What it costs a family | Part of a water bill you already pay | A separate purchase; single-serve bottles cost far more per gallon |
| Fluoride | Adjusted to 0.7 mg per liter where communities choose to fluoridate | Varies; check the label or ask the bottler |
| Best for | Everyday drinking, cooking and reusable bottles | Advisories, emergencies, travel and a stored backup supply |
Tap water suits the day to day. Bottled water suits households that want a stored backup, families dealing with a utility notice or advisory, and trips away from home. Most families end up using both, with tap doing the everyday work.
Fluoride and Your Kids’ Teeth
Community water fluoridation means adjusting how much fluoride is in the water supply to the level public health experts advise for cavity prevention. The recommended concentration is 0.7 milligrams per liter, and drinking fluoridated water cuts cavities by about 25 percent in children and adults. The CDC counts fluoridation among its 10 standout public health achievements of the 20th century, pointing to the drop in cavities since communities began fluoridating water in 1945.
Whether to fluoridate is a decision for state and local governments, and sometimes voters. Some areas already have naturally occurring fluoride at levels proven to prevent cavities, some communities add fluoride to reach the optimal level, and some remove fluoride when the natural level is too high.
There is a money angle too. Where the water is fluoridated, avoiding cavity treatment saves communities an average of $32 per resident each year, and communities of 1,000 or more people see an estimated return of $20 for every $1 spent.
If bottled water is most of what your kids drink, check the label or contact the bottler, since fluoride content varies. And if your local water is not fluoridated, ask your dentist or pediatrician whether your children need fluoride from another source. That call depends on your kids’ actual teeth, so it belongs with a professional who can see them.
Parents also ask
Is bottled water safer than tap water for kids?
Both are regulated. Public tap water must meet EPA standards covering more than 90 contaminants, while the FDA regulates bottled water. Your annual water quality report shows what was actually found in your local tap water, which is the best place to start.
How do I find my water quality report?
The EPA requires utilities to deliver it by July 1 every year, by mail or online. If a management company pays your water bill, ask your landlord or building manager or check the utility’s website. You can also call the EPA’s Drinking Water Hotline at 800-426-4791.
Does bottled water have fluoride?
It varies by brand and water source, so check the label or contact the bottler. If bottled water is most of what your kids drink, ask your dentist or pediatrician whether they need fluoride from another source.
Do we need a home water filter?
Start with your Consumer Confidence Report. If taste is your only complaint, a basic filter may be enough. If the report lists a contaminant that concerns you, look for a filter certified to reduce that specific contaminant and replace cartridges on schedule.
This guide is general information for U.S. shoppers, not legal advice. Safety rules and store policies change, so follow the product’s instructions and labels and check official sources such as CPSC.gov, NHTSA.gov and FTC.gov.