Private well owners can be left facing PFAS contamination with few of the protections that apply to municipal water systems, according to an Associated Press investigation published Feb. 2. The AP describes PFAS—often called “forever chemicals”—as a class of substances that persist in the environment and that can be difficult to detect and address in households that draw drinking water from their own land-based wells.
The investigation frames the vulnerability as both practical and regulatory: private well users may not know their water is contaminated, and even after a problem is identified, the steps required to restore safe drinking water can take years. The AP says the federal government has set strict limits for PFAS in drinking water from public utilities and has required testing in those systems, but that private wells are generally outside those requirements. The AP reports that the result can be a delayed discovery of contamination near industrial sites, where households’ access to testing and help depends on local decisions and enforcement priorities.
The AP also describes why PFAS are so hard to deal with once they appear. It says PFAS are uniquely able to repel stains and moisture and to withstand heat—properties that made them useful for products ranging from waterproof shoes to firefighting foam—while also noting that PFAS do not break down in the environment and are now common. The AP says research has linked exposure to increased risk of certain cancers and developmental delays in children.
In the AP’s reporting, the logistics of fixing private-well contamination add another layer of difficulty. The AP says that while water utilities can typically treat PFAS in one centralized place, restoring safe water for well owners often has to be done household by household, which can leave some owners without help while regulators, lawyers, and companies negotiate over where the responsibility lies.
The AP cites an example from Peshtigo, Wisconsin, where PFAS was detected nearly a decade ago near a firefighting-foam plant owned by Tyco and parent company Johnson Controls, which manufactured foam used for firefighting. The AP says a dispute over which properties needed new, deeper wells meant one resident might be offered help while another nearby resident would not. The AP reports that Johnson Controls said it has taken full responsibility for the area its investigation showed was its responsibility.
The AP adds that identifying all affected wells can be time-consuming and costly. It says that in North Carolina, PFAS has stretched from a chemical plant nearly 100 miles (160 kilometers) down the Cape Fear River, requiring tens of thousands of tests to determine where contamination ends and to locate households affected by it.
The investigation also points to geographic variation in how quickly and clearly residents get information about private-well testing. Because the AP says there are no national rules limiting PFAS in private wells, it reports that responsibility falls to states. The AP says at least 20 states do not test private wells for PFAS outside of areas where problems are already suspected, based on an AP survey of state agencies, and that many states lack clear policies telling well owners when PFAS problems are identified nearby.
The AP contrasts that with what it describes as more proactive efforts in Michigan. It says Michigan officials have tested groundwater and offered free tests to owners near PFAS hotspots, and that millions of people there rely on private wells. The AP also notes that tests can cost hundreds of dollars and that many well owners are reluctant or unable to pay for them.
Elsewhere, the AP says well owners often remain without support unless contamination becomes the subject of an agreement or legal process. It describes northwest Georgia, where carpet mills began applying PFAS for stain resistance decades ago and where wastewater tainted much of the landscape, but it says only well owners near Calhoun have been offered free tests and that this occurred under a court agreement.
The AP says proposed new federal rules aimed at private wells would not be viable for many well owners who value freedom from government oversight and the absence of a monthly bill. At the same time, it describes how that freedom can turn into a liability when contamination is found, leaving households without an automatic pathway to testing, cleanup, or replacement wells.
To illustrate how PFAS can upend a community, the AP describes a Wisconsin project in which Kristen Hanneman agreed in 2022 to test private wells. The AP says the PFAS in Hanneman’s family well was thousands of times above federal limits for drinking water. The AP reports that the discovery stunned neighbors and has led to years of investigation and worry, as state officials point to a nearby paper mill that spread PFAS-laden sludge on local farm fields, which it believes contaminated groundwater, lakes, and even fish and deer.
The investigation says the mill’s current and former owners say the activities were permitted by the state long before dangers were widely understood and that they stopped using PFAS in their manufacturing process years ago. The AP also says the state has limited resources to help with testing and providing grants for new, deeper, and safer wells, leaving residents of the rural town navigating years of uncertainty about what exposure could mean for them and their children.