The States With the Worst Tap Water in 2026
Your building's water comes from a public system that has to meet federal standards, and a large share of systems fall short at some point in the year. In 2024, 31% of active U.S. public water systems had at least one reported drinking water violation, and about 7% had a health-based violation, according to the EPA's national public water systems compliance report. A 2023 U.S. Geological Survey (USGS) study estimated that at least 45% of the nation's tap water contains one or more types of PFAS (per- and polyfluoroalkyl substances, often called forever chemicals).
No single official ranking of the worst tap water states exists, but five states where Bottleless Nation serves businesses keep showing up in the contamination data: Texas, New Jersey, Pennsylvania, Arizona, and Wisconsin.
Texas: PFAS in City Systems, Farmland, and Wells
In April 2024, 49 Texas public water systems reported PFAS levels above the EPA's first enforceable limits, and experts told the Texas Tribune the real count was likely higher because not every system had reported yet. In February 2025, Johnson County, south of Fort Worth, declared a state of disaster after PFAS from biosolids (treated sewage sludge spread as fertilizer) turned up on farmland and in nearby water wells at levels several hundred times above EPA limits. In March 2025, the City of Fort Worth sued PFAS manufacturers and the U.S. Department of Defense, seeking $400 million in damages.
Private wells leave a gap of their own. The federal government doesn't regulate private well water under the Safe Drinking Water Act, and the EPA says private well owners are responsible for the safety of their own water. A business on a private well in Texas is responsible for its own testing.
New Jersey: Early PFAS Limits and a Lead Pipe Deadline
New Jersey moved on PFAS years ahead of the federal government. The state set a drinking water limit of 13 parts per trillion (ppt) for PFNA in 2018, then adopted limits of 14 ppt for PFOA and 13 ppt for PFOS in 2020, among the strictest in the country at the time. New Jersey utilities have tested for these compounds under state rules longer than utilities in most states, so more of the problem is on record.
Lead is the state's other long-running issue. A lead service line is the pipe connecting a building to the water main, and older buildings are the most likely to still have one. A 2021 state law requires public community water systems to inventory and replace every lead service line within 10 years. Until the pipe serving your building is replaced, the steps facilities managers can take on lead still apply.
Pennsylvania: PFAS in Most of the Streams Tested
A 2023 USGS study, done with the Pennsylvania Department of Environmental Protection and the Susquehanna River Basin Commission, sampled 161 rivers and streams across the state and found PFAS in 76% of them. The highest concentrations turned up in heavily populated areas, including Philadelphia and Pittsburgh, and the waterways tested include drinking water sources for Philadelphia and nearby communities.
The study measured raw river and stream water, not what comes out of the tap, since utilities treat water before it reaches a building. For businesses in and around Philadelphia, PFAS at the tap depends on how the local utility treats its supply, and the utility's yearly water quality report is the place to check.
Arizona: Arsenic, Chromium-6, and Hard Water
Arsenic occurs naturally in Arizona's groundwater, picked up as water moves through rock and soil. After the EPA tightened its arsenic limit from 50 to 10 parts per billion (ppb), the Arizona Department of Environmental Quality estimated that nearly one-third of the state's regulated water systems didn't meet the new standard. The arsenic risks for businesses in high-risk markets carry over to any building on that supply.
A 2016 Environmental Working Group (EWG) analysis of EPA data found Phoenix had the highest chromium-6 levels of any city it reviewed. In Tucson, the EPA ordered the U.S. Air Force and the Arizona Air National Guard in 2024 to address PFAS in groundwater under a city well field that supplies drinking water.
Phoenix-area water is also hard, and hard water in Phoenix leaves scale inside ice machines, coffee makers, and water heaters whether or not anything in the water is a health concern. Bottleless Nation's Phoenix team installs and services units across the Phoenix area.
Wisconsin: Farm Runoff and PFAS in Private Wells
Wisconsin has roughly 800,000 private wells, and farming shapes what ends up in many of them. The state Department of Natural Resources (DNR) estimates that 90% of the nitrate contamination in Wisconsin's groundwater comes from agriculture. A 2023 state survey estimated that about 43% of private wells contain one or more pesticides. Nitrate is most dangerous for infants, and the health risks and federal limit for nitrates explain why it matters for a workplace too.
PFAS shows up as well. A survey by the DNR, the University of Wisconsin-Stevens Point, and the Wisconsin State Laboratory of Hygiene sampled 450 shallow private wells and found at least one PFAS compound in 71% of them. Most results came in below state health recommendations, and fewer than 4% topped the 4 ppt limits the EPA had proposed for PFOA and PFOS at the time.
Fabulous clean water. We are on a well at our office, but the water from the RO machine is clear and tasty. Randy Bower does a great job taking care of our needs.
— Drew C., Appleton, WI (Google review)
Which Contaminants Show Up Most?
Five contaminants account for most of the findings above. The table lists each one with its federal standard and the states in this piece where it came up.
| Contaminant | Federal standard | Main concern | States in this piece |
|---|---|---|---|
| PFOA and PFOS (PFAS) | 4 ppt each, health goal of zero | Long-term health effects at very low levels | TX, NJ, PA, AZ, WI |
| Lead | Health goal of zero | Harm to children even at low exposure | NJ |
| Arsenic | 10 ppb | Cancer risk, often from natural sources | AZ |
| Nitrate | 10 mg/L (as nitrogen) | Dangerous for infants | WI |
| Chromium-6 | No separate federal limit (covered under total chromium) | Cancer risk | AZ |
PFAS rules are still moving. The EPA's 2024 rule set enforceable limits of 4 ppt for PFOA and PFOS, with a health goal of zero, and gives utilities until 2029 to comply. On May 18, 2026, the EPA proposed keeping those two limits while letting utilities request two more years, to 2031, and proposed rescinding the 2024 standards for four other PFAS measures. Neither proposal was final as of October 2026. The PFAS guide for businesses tracks the full regulatory picture.
Lead has no safe threshold for children. The EPA set its health goal for lead in drinking water at zero, and the EPA and the Centers for Disease Control and Prevention (CDC) say there is no known safe level of lead in a child's blood.
How Do You Check Your Building's Water?
A state's track record gives context, but your utility's results are what matter for your building. Every community water system publishes a yearly Consumer Confidence Report listing what it detected. The EWG Tap Water Database compares utility results with EWG's own health guidelines, which are often stricter than EPA legal limits. Bottleless Nation's free tap water quality lookup shows the contaminants detected in your local supply by zip code.
Utility reports stop at the water main. Lead can still enter between the main and your tap from service lines, solder, and fixtures, and standard water tests don't cover PFAS. A PFAS test has to go through a certified lab using an EPA drinking water method such as Method 533 or 537.1. For a contaminant-by-contaminant rundown, what's in your tap water and what businesses can do about it covers each one.
What Businesses in These States Can Do
A bottleless water purification system connects to your building's water line and purifies the water on site, so what your team drinks doesn't ride on what the utility is dealing with that month. Bottleless Nation's S1 and S3 water and ice units send water through four stages of purification: a sediment filter, a carbon filter, a reverse osmosis membrane, and a final carbon filter. The M6 hot and cold water cooler adds a fifth stage, a mineral boost filter.
Reverse osmosis pushes water through a membrane so fine that most contaminants can't get through, and it reduces PFAS, lead, arsenic, and nitrate. The S1, S3, and M6 are certified to NSF/ANSI 58 for reverse osmosis and NSF/ANSI 55 for ultraviolet (UV) treatment. Each unit has a UV LED light inside the water tank that keeps stored water sanitized, and SMART monitoring that reports how the unit is running back to Bottleless Nation. The guide to how reverse osmosis works for business drinking water covers the process step by step.
The S1 and S3 make ice from the same purified water, and Bottleless Nation can add S3 units or a standalone commercial ice machine depending on the space and how much ice the site uses. In hard-water markets like Phoenix, what hard water does to commercial ice machines is worth reading before you choose equipment.
Bottleless Nation sets up water for nearly any type of workplace, from healthcare facilities to manufacturing plants and warehouses to government and municipal buildings. Installation and service calls come at no extra charge. Our team handles annual preventative maintenance and the annual filter change on every machine, commercial ice machines included, and aims to respond to service calls within two days. At every visit, our technicians use a meter to test the total dissolved solids (TDS, the minerals and other matter dissolved in water) in your tap water and in our purified water.
Bottleless Nation serves businesses in all five of these states, across 33 markets nationwide. Talk to our team about what's in your building's water and which setup fits your space.
Related Guides
- What's in Your Tap Water and What Businesses Can Do About It
- PFAS in Drinking Water: What Every Business Needs to Know
- Lead in Drinking Water: What Facilities Managers Need to Know
- Arsenic in Drinking Water: What Businesses in High-Risk Markets Need to Know
- Nitrates in Drinking Water: What Businesses Need to Know
- Hard Water and Commercial Equipment: The True Cost
Frequently Asked Questions
Which states have the worst tap water in 2026?
No single official ranking exists. Published lists combine different data, such as violation counts, PFAS detections, lead pipes, and well contamination. Texas, New Jersey, Pennsylvania, Arizona, and Wisconsin all appear in that data for PFAS, lead, arsenic, nitrate, or chromium-6. Your utility's yearly water quality report is the best guide to your own building.
Does my business need to test its own water?
A utility report covers the public system, not the pipes inside your building, and it may not include every PFAS compound. Buildings with older plumbing can test for lead at the tap, and a certified lab can run a PFAS test. Businesses on a private well are responsible for all of their own testing.
Does reverse osmosis reduce PFAS?
Yes. Reverse osmosis reduces PFAS along with lead, arsenic, and nitrate. Bottleless Nation's S1, S3, and M6 units are certified to NSF/ANSI 58 for reverse osmosis and NSF/ANSI 55 for UV treatment.
Who handles maintenance and filter changes?
Bottleless Nation's team does. We handle annual preventative maintenance and the annual filter change on every machine, commercial ice machines included. Installation and service calls come at no extra charge, and we aim to respond to service calls within two days.
What happens to the used filters?
Used filters from water purification systems usually end up in a landfill. Bottleless Nation sends ours to Reworld, which destroys them at about 1,100°C. An EPA-validated study at Reworld's Lake County, Florida facility found 99% destruction of the PFAS surrogate compound it tracked.
Does Bottleless Nation serve businesses in these states?
Yes. Bottleless Nation serves businesses in and around Dallas-Fort Worth, Houston, Austin, San Antonio, Newark, Trenton, Philadelphia, Phoenix, Milwaukee, Appleton, and Altoona, and the full list of Bottleless Nation locations shows every market we serve.