America’s Toxic Tap Water: How EWG Data Reveals Dangerous Water Quality in Most Cities—and What You Can Do
What Are the Top Toxins in American Water?
Thousands of communities across the U.S. face contamination of their drinking water with harmful toxins.
According to the Environmental Working Group (EWG) in 2025, the most prevalent and dangerous contaminants include:
- PFAS (Per- and Polyfluoroalkyl Substances commonly known as Forever Chemicals)
- Fluoride
- Arsenic
- Chromium-6
- Disinfection byproducts like trihalomethanes.
These toxins pose significant health risks, including
- Cancer
- Immune system damage and
- Developmental problems.
Awareness and regular testing are crucial steps toward protecting you and your family’s health.
TOXIC TAP WATER CHART
| Toxin | People Affected (Millions) | Potential Health Effects |
|---|---|---|
| PFAS (Forever Chemicals) | 200 | Cancer, thyroid disease, immune disruption, reproductive harm |
| Fluoride | 252 | Dental and skeletal fluorosis, thyroid dysfunction |
| Arsenic | 108 | Various cancers, cardiovascular issues |
| Chromium-6 | 251 | Cancer, liver damage, immune system effects |
| Total Trihalomethanes (TTHMs) | 296 | Possible cancer, developmental and reproductive harm |
How Does PFAS Exposure Affect My Health?
PFAS are a group of persistent chemicals found in many drinking water sources across the nation.
Exposure to PFAS is linked to increased risks of:
- Cancer
- Hormone disruptions
- Weakened immune response
- and Adverse effects on fetal development.
These “forever chemicals” accumulate in the body and environment, making them particularly concerning for long-term health.
Did you know the popular brand of bottled sparkling water, Topo Chico, had the highest amount of PFA recorded in 2020?
So it is not just tap water but bottled sources as well.
In 2021, they reduced the PFA amount by 50%, but it is still advisable to avoid consuming chemicals like this regularly.
How Do I Check My Local Water Quality?
To assess the safety of your tap water, visit the Environmental Working Group’s Tap Water Database, which offers detailed contaminant profiles for nearly every water utility in the United States.
You can search by zip code to see which toxins have been detected locally and find recommendations for reducing exposure.
Environmental Protection Agency Statistics
New data from the Environmental Protection Agency reveal that millions of Americans are drinking and bathing in contaminated tap water.
PFA, or “forever chemicals,” are found in many cities and towns in America.
Toxic tap water is a serious health threat, and these PFAs are linked to:
- Cancer
- Developmental Issues
- Hormone Disruptions
to name just a few of the key health issues Americans face today from toxic tap water.
PFAs are only one group of toxins found in today’s toxic tap water.
Beyond PFAs, you will find
- Heavy metals
- Nitrates
- Disinfectant byproducts
- Chromium-6
- Radium
- Bromine
- and Haloacetic acids.
Studies show these dangerous substances can lead to cancer.
The data from the EPA, the National Cancer Institute, and peer-reviewed journals support this.
You can see one such nitrate article here.
EWG Water Quality Statistics and Reports
The EWG is a non-profit environmental working group that seeks to protect human and environmental health through research and advocacy.
For example, you can go to the EWG website here.
Then type in your zipcode to see all the toxic tap water contamination you may be facing.
One of their latest findings reveals that nitrates in toxic tap water pose a significant issue for nearly 60 million Americans.
As I mentioned, nitrates have been linked to cancer.
Because nitrates are typically caused by agricultural runoff, you will see nitrate contamination in small rural towns over the big cities.
Nitrates come from a chemical substance found in fertilizer as well as animal manure.
However, big cities also deal with an enormous amount of toxins in their tap water.
Drinking Water Contamination Chart
Frequently Asked Questions Toxic Tap Water
What are the top toxins in American water?
As per the EWG statistics and research the top toxins are Fluroide, Chromium 6 and PFA’s. The EWG emphasizes the need for stronger regulations because what is considered acceptable does not mean it is considered safe.
What health risks do these water contaminants pose?
Fluoride is linked to
Linked to dental and skeletal fluorosis, thyroid dysfunction, bone, cardiovascular, and reproductive problems.
- Chromium-6 (Hexavalent Chromium) is linked to cancer, immune suppression and liver damage. If you read my blog you know how important your liver is to sustaining the health and life force of your body.
- See my post on liver health here.
- PFAS (Perfluoroalkyl and Polyfluoroalkyl Substances) linked to cancer, thyroid disease, immune system harm, and reproductive issues.
How do I know if my tap water is contaminated?
According to the Environmental Working Group (EWG), here is how you can know if your tap water is contaminated:
Check Your Local Water Quality Report (Consumer Confidence Report):
Public water systems in the U.S. are required to provide annual water quality reports that detail detected contaminants and their levels. These reports are often available on your water utility’s website or by request.Use the EWG Tap Water Database:
EWG consolidates publicly available data from water systems nationwide into an easy-to-search database where you can enter your zip code to see specific contaminant levels reported in your area along with their health guideline comparisons.Look for Physical Signs and Sensory Clues:
While many contaminants are odorless and tasteless, any unusual changes in water color, cloudiness, or odor can indicate contamination, though this is not always reliable.Conduct Home Water Testing:
You can purchase water testing kits or hire professional services to test your water for specific contaminants such as lead, arsenic, PFAS, and others.Understand Health Guidelines vs. Legal Limits:
EWG’s health guidelines are often more stringent than federal legal limits, so water may be legally compliant but still pose health risks according to EWG standards.
Top Toxins in America’s Tap Water as per EWG Reports
What Can You Do To Remove Toxins From Your Tap Water?
If you’re concerned about toxins in your tap water, the most effective steps you can take are:
- Identify which contaminants are present,
- Select a certified water filter that targets those specific pollutants, and regularly maintain your filtration system.
The Environmental Working Group (EWG) recommends using their online Tap Water Database to learn about the toxins found in your area, like
- PFAS
- Lead
- Arsenic
- and Chromium-6, then choosing a proven filter such as reverse osmosis, activated carbon, or ion exchange.
Based on my research, the Aqua Tru RO system is the best option for an under-sink unit.
This would be the most affordable option.
The AquaTru RO system stands out for its rigorous third-party certifications and proven performance in removing contaminants.
It is independently tested and certified by IAPMO to meet multiple NSF/ANSI standards—specifically NSF/ANSI 42, 53, 58, 401, and P473.
This means AquaTru effectively removes a broad spectrum of 84 contaminants, including lead, arsenic, fluoride, chromium-6, PFAS (“forever chemicals” like PFOA/PFOS), chlorine, nitrates, and many others commonly found in America’s toxic tap water.
Using these methods gives you the best protection against harmful chemicals, heavy metals, and byproducts often missed by basic filters.
Testing your water after filtration ensures you’re consistently protected.
One Critical Issue: Shower and Bath Filters Do NOT Remove Toxic Tap Water Contaminants
After conducting extensive research, I have yet to find a solution for people dealing with these contaminants to address the water they bathe and shower in.
This is because the Reverse Osmosis that removes these contaminants would make the water flow so slowly that it would not be feasible for your shower head.
And those bath filters do not take out most of these serious contaminants.
The most effective solution is to install a Whole House Filter Unit.
While these systems can cost several thousand dollars, they provide comprehensive filtration for all the water entering your home, making it a worthwhile investment for truly clean and safe water throughout your household.
The Pioneer Whole House Filter is a great option to use in conjunction with the AquaTru system at key points, such as your kitchen sink, to remove contaminants like arsenic and nitrates effectively.
However, if you can’t afford it or are renting, then stick with the R.O. or consider getting a distiller.
Distillers can take out a wide range of contaminants, including nitrates.
Use my code ‘detox’ to get a Pure Water Distiller for 10% off at My Pure Water Distiller.
My Personal Thoughts & Why Your Local Water Quality Matters
When I chose the location where I live, that was the most important thing to me 10 years ago.
I wanted to live away from industry, where the water was as pure as possible.
This is something I truly value, as I reflect on the key role water plays in our lives and how it is the basis for a healthy life.
Water is life.
My water comes from a deep aquifer with some of the best water in America, with only one contaminant.
If you’re thinking about moving, make sure to use the EWG Tap Water Database to check the water quality in your prospective area.
This can help you choose a location with clean, safe water—especially if water purity is important to you.
And always test your own water.
Closing Thoughts: Protect Your Health by Knowing What’s in Your Water
Regardless of where you live, being aware of the quality of your tap water is crucial for maintaining your health and peace of mind.
Today’s most dangerous contaminants—PFAS, lead, arsenic, and nitrates—are present in water supplies across the country, and simple solutions like basic shower or bath filters aren’t enough.
Experts and organizations like the Environmental Working Group (EWG) recommend using their Tap Water Database to identify local risks and investing in proven filtration systems such as reverse osmosis and whole-house filters to safeguard your family.
When considering a move or upgrading your home’s water system, take time to review local water reports and choose certified filters that remove the toxins most relevant to your area.
Clean water isn’t just a convenience—it’s an essential investment in your well-being.
By prioritizing water safety and taking informed action, you can ensure a healthier life for yourself and those you care about.
For more resources and guidance, always consult reputable sites like EWG, as many local water authorities may not go to the same depths as they do to protect you and the environment.
Get involved locally to help you, your family, and your community.
Toxic tap water is a serious issue that requires immediate attention.
After all, water is the very foundation of our lives.
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