PFAS in Illinois is a documented, statewide issue: state regulators have tested the finished drinking water of all 1,749 community water supplies in Illinois for these so-called forever chemicals, enforceable federal limits now apply to the two most studied compounds, and residents whose water, property, or health has been harmed may have legal claims against the polluters responsible. For Illinois communities that have already lived through industrial groundwater contamination — from Chicago’s old manufacturing corridors to the collar counties and downstate — PFAS is the latest chapter in a long history of pollution reaching people’s homes.
This article explains what PFAS are, what the science says about health risks, where the drinking water rules stand as of this writing, and who may have a claim.
Per- and polyfluoroalkyl substances, known as PFAS, are a family of thousands of widely used man-made chemicals. According to the U.S. EPA, PFAS are long lasting, break down very slowly over time, and have been used in numerous consumer, commercial, and industrial products. That durability is the reason for the “forever chemicals” nickname, and it’s also the problem. EPA reports that PFAS are found in water, air, fish, and soil at locations across the nation, and that because of their widespread use and persistence, many PFAS are found in the blood of people and animals all over the world.
For most families, drinking water is the exposure that matters. Communities near manufacturing plants, airports, military installations, fire training grounds, and landfills tend to face the highest risk, because PFAS used or disposed of at those sites can migrate into groundwater and public water supplies over many years.
Federal health and environmental agencies, including EPA and the CDC’s Agency for Toxic Substances and Disease Registry, have been studying PFAS for years. According to EPA’s summary of the current science, peer-reviewed studies indicate that exposure to certain levels of PFAS may lead to a range of harms. Those include reproductive effects such as decreased fertility and increased high blood pressure in pregnant women, developmental effects in children including low birth weight, increased risk of certain cancers, including prostate, kidney, and testicular cancers, reduced ability of the immune system to fight infection, including reduced vaccine response, interference with the body’s natural hormones, and increased cholesterol levels.
EPA is careful to note that the health effects of PFAS are difficult to pin down, because there are thousands of different PFAS compounds and people are exposed in different ways over different periods. That caution matters in litigation too. Proving that a specific exposure caused a specific illness takes rigorous scientific work, which is one reason these cases benefit from firms with real environmental litigation experience.
The federal rules have shifted several times, so here is the status as of July 2026, when we verified it on EPA’s PFAS drinking water page. In April 2024, EPA finalized the first national drinking water regulation for PFAS, setting enforceable maximum contaminant levels that include a limit of 4.0 parts per trillion for PFOA and PFOS, the two most studied compounds, along with limits for several others. Under the 2024 rule, water systems were to complete initial monitoring by 2027 and implement treatment where needed by 2029.
Since then, EPA has announced changes. In May 2025 the agency said it would keep the limits for PFOA and PFOS while moving to rescind the standards for several other PFAS compounds, and in May 2026 it issued proposed rules that would add a compliance extension option for water systems. Those proposals were still pending when this article was verified. The bottom line for residents is that enforceable federal limits on PFOA and PFOS remain in place, but the details of the broader rule may change, so check current sources or ask a lawyer about the standards that apply to your situation.
Illinois has been ahead of many states on this issue. According to the Illinois EPA, the agency completed a statewide investigation in 2021 into the prevalence of PFAS in finished drinking water at all 1,749 community water supplies in Illinois. The state has adopted groundwater quality standards for six PFAS compounds, published statewide health advisory information, and maintains an interactive dashboard where residents can look up sampling results. Community water supplies in Illinois now monitor for PFAS and must comply with maximum contaminant levels.
Those tools are useful for families who want answers. If your community’s results show PFAS in Illinois drinking water at levels of concern, that public data can also become important evidence in a legal claim.
PFAS litigation is among the most active areas of environmental law in the country, and several groups of Illinois residents may have claims:
Because PFAS releases tend to affect whole neighborhoods at once, some cases proceed collectively. Our overview of how class action lawsuits work in Illinois explains when a group case makes sense and when individual claims are stronger.
Collins Law Group is not a firm that dabbles in environmental cases. Our lawyers have spent years litigating contamination matters across Illinois on behalf of families and communities harmed by industrial pollution, including major groundwater and toxic exposure cases, and the firm’s environmental practice includes record Illinois verdicts. Every case is different, and past results do not guarantee future outcomes. That background matters in PFAS litigation, where the defendants are often large chemical and industrial companies with well-funded defense teams. You can read more about our Illinois environmental law practice and the kinds of contamination cases we handle.
Start with information. Review your water utility’s annual water quality report, look up your community on the Illinois EPA’s PFAS dashboard, and if you rely on a private well near an industrial site, airport, or fire training area, consider having the well tested by a certified laboratory. Keep copies of any notices your utility sends about PFAS, along with your test results and related medical records.
If testing shows contamination, or if you or a family member has been diagnosed with a condition linked to PFAS after years of exposure, talk to a lawyer before accepting any settlement or signing anything from a company involved. Deadlines apply to environmental claims, and the evidence that supports them is easier to gather early.
EPA’s 2024 drinking water rule set enforceable limits of 4.0 parts per trillion for PFOA and PFOS, the two most studied PFAS compounds. Illinois has also adopted groundwater quality standards and health advisory guidance for several PFAS. Because parts of the federal rule were under revision as of mid-2026, ask your utility or a lawyer about the current standards for your water system.
Check your water utility’s annual consumer confidence report and the Illinois EPA’s PFAS sampling dashboard, which includes results from its statewide investigation of all 1,749 community water supplies. If you use a private well, a certified laboratory can test your water for PFAS.
Possibly, if PFAS from an identifiable source contaminated your water or property or contributed to a diagnosed health condition. Claims can seek the cost of clean water, loss of property value, and compensation for personal injuries. A free consultation with an environmental attorney can tell you whether your situation supports a claim.
If PFAS contamination has touched your water, your property, or your family’s health, you don’t have to sort out the science and the law on your own. Collins Law Group has deep experience litigating contamination cases against major polluters across Illinois, and we can help you understand your test results, identify the responsible parties, and pursue every category of compensation available. We offer free consultations, and we handle environmental cases on a contingency basis, so you pay nothing unless we recover for you. Contact Collins Law Group today to discuss your PFAS concerns with our team.
John D. Risvold is an equity partner at Collins Law Group, P.C. in Naperville, Illinois. He represents individuals and families in catastrophic personal injury and wrongful death cases, focusing on commercial trucking crashes, rideshare and autonomous vehicle litigation, medical malpractice and birth injury, and product defect claims. He has tried cases to verdict in Illinois courts, recovered more than $50 million for clients over thirteen years of practice, and has been named to Best Lawyers in America for Personal Injury Litigation and Illinois Super Lawyers.
This article is for general information only and is not legal advice. Reading it does not create an attorney-client relationship. Every case is different; if you have been injured, speak with a lawyer about your specific situation.
