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PFAS were detected in 25 of 29 North Carolina rivers and creeks sampled between 2022 and 2024, according to an Environment America report released in 2026. That is 86% of the waterways in this targeted sample—not evidence that 86% of every river in the state is contaminated. Nineteen sites measured above 4 parts per trillion (ppt), and 13 measured above 10 ppt.
What the 86% finding actually means
Local conservation groups collected samples from 29 North Carolina waterways over 2022–2024. Environment America reported PFAS in 25 of those samples. The sample included several dozen PFAS compounds, and many of the waterways sampled feed drinking-water supplies.
| Measure | Result | How to interpret it |
|---|---|---|
| Waterways with PFAS detected | 25 of 29 | 86% of the waterways included in this targeted sample |
| Sites above 4 ppt | 19 of 29 | Above the federal maximum contaminant level for PFOA and PFOS when those compounds are the contaminants measured |
| Sites above 10 ppt | 13 of 29 | Above the federal maximum contaminant level for GenX chemicals, PFNA and PFHxS when those compounds are the contaminants measured |
The percentages describe this 29-site investigation. They are not a statewide census, and a positive result does not by itself show whether a particular household’s tap water exceeds a legal limit. Concentrations can vary by compound, location, sampling date and treatment system.
Why PFAS are called “forever chemicals”
They persist in the environment
PFAS are a large family of manufactured chemicals. Many do not break down readily, allowing them to remain in water, soil and sediment for long periods. Some PFAS can also bioaccumulate, meaning concentrations can build up in living organisms over time. The term “forever chemicals” describes this persistence; it does not mean every PFAS behaves identically.
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Detection is not the same as a single statewide risk level
The report covered multiple PFAS compounds rather than one substance. A result must be interpreted alongside the specific compounds detected, their concentrations, exposure pathways and the applicable drinking-water standard. A river sample also cannot be used to predict the exact PFAS level at every downstream intake or private well.
What North Carolina’s wastewater data adds
North Carolina’s Department of Environmental Quality (NC DEQ) reported early results from a 2023 wastewater pilot. PFAS were found in every sampled facility and across wastewater, biosolids, soil and compost samples. The pilot estimated that 87% to 98% of PFAS entering the sampled treatment plants left in treated effluent discharged to surface water.
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Those percentages are estimates from the pilot facilities, not measurements of every treatment plant in the state. NC DEQ says the work was an early assessment and that detailed fate-and-transport analysis was outside the project’s scope. The results indicate that conventional wastewater treatment may transfer much of the incoming PFAS load to effluent rather than destroy it.
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Federal limits currently cited by NC DEQ
NC DEQ’s drinking-water guidance lists these federal maximum contaminant levels:
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| PFAS group | Maximum contaminant level |
|---|---|
| PFOA and PFOS | 4 ppt |
| GenX chemicals, PFNA and PFHxS | 10 ppt |
Many PFAS still do not have federal limits. A water system can therefore have a detectable PFAS result even when no specific enforceable limit applies to the compound found. Federal regulatory plans were being reconsidered in 2026, so readers should verify the current rule and their utility’s latest notice before treating these standards as unchanged.
If you use a public water system
Ask the utility whether it has sampled for PFAS, which compounds were included, when samples were collected and what concentrations were reported. Utilities may have results in annual water-quality reports, public notices or records available on request. A river result near an intake does not automatically represent finished tap water because treatment, blending and intake location can change concentrations.
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If you rely on a private well
NC DEQ advises private-well owners to use a certified laboratory for PFAS testing. Ask the laboratory which PFAS compounds it measures, its reporting limit and how the sample must be collected. Keep the laboratory report, sampling date and well location so future results can be compared under similar conditions.
How to decide whether to filter
NC DEQ identifies several possible formats: whole-house systems, under-sink units, pitchers and refrigerator filters. The right choice depends on where exposure occurs and what the device has actually demonstrated.
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- Point-of-use systems: Under-sink, pitcher and refrigerator filters treat water at a drinking or cooking tap. They generally require less installation and treat less water than a whole-house system.
- Whole-house systems: These treat water entering the home and may be relevant when bathing, washing or other household uses are part of the concern, but they involve greater installation, maintenance and replacement costs.
- Compound coverage: Check which PFAS are covered. A claim for one or a few compounds is not proof that the device removes the entire PFAS family.
- Verified reduction: Look for independently certified performance and the tested reduction level for the specific PFAS compounds of concern. Do not assume a generic carbon or “water purifier” claim removes PFAS.
- Maintenance evidence: Confirm cartridge life, replacement price and whether performance depends on flow rate, water chemistry or installation. An overdue cartridge can reduce protection.
- Testing: Compare the manufacturer’s test evidence with an independent laboratory result when possible, especially for a private well or a system with a known PFAS source.
Filtering is a household exposure-reduction step, not a substitute for identifying and controlling a contamination source. If a filter is installed, follow the device’s sampling and replacement instructions and keep records of changes.
What residents should do next
- Identify your water source. Determine whether your home is served by a public utility, a shared system or a private well.
- Request existing data. Ask a public utility for PFAS sampling results and the compounds tested. For a private well, contact a certified laboratory before collecting a sample.
- Match the test to the decision. If the concern is drinking water, obtain a result from the kitchen tap or the well under the laboratory’s instructions. If you are investigating a river, use the agency or organization’s sampling location and date rather than extrapolating to your home.
- Choose treatment by evidence. Select a point-of-use or whole-house format only after checking certified compound coverage, verified reduction performance, installation limits and replacement requirements.
- Track changes. Keep reports and retest after a substantial change in the source, treatment system or well conditions.
What is known—and what is not—about statewide exposure
NC DEQ secretary Reid Wilson was reported by AOL in 2026 as estimating that 3.5 million North Carolinians drink PFAS-contaminated water. That figure is an attributed estimate, not an independently verified statewide count, and it should not be read as a measurement of every resident’s tap-water concentration.
The findings have prompted renewed calls for stronger controls. “Every North Carolinian should be able to drink clean and safe water, free of toxic chemicals,” said Kemp Burdette, Cape Fear Riverkeeper, who pointed to industrial discharges in the Cape Fear Basin. Attorney General Jeff Jackson said, “Everyone deserves to have safe water to drink.” The report and the wastewater pilot show widespread detection in the samples studied, while questions about source tracking, transport, treatment effectiveness and future regulation remain site-specific.
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