West Virginia and the origin of the C8 case

Few places carry as much weight in the national PFAS story as West Virginia. For decades the DuPont Washington Works plant near Parkersburg released C8, the compound better known as PFOA and used to manufacture Teflon, straight into the Ohio River. That discharge worked its way into drinking water on both the West Virginia and downstream Ohio sides of the river and became the seed of one of the most consequential PFAS legal fights the country has seen. Much of what Americans now take for granted about PFAS liability began on this stretch of the Ohio.

The fallout was heavily documented. The C8 Science Panel, created as a condition of the litigation, tied PFOA exposure to six health conditions after years of study. DuPont and its spinoff Chemours eventually paid close to $671 million in 2017 to resolve roughly 3,550 personal-injury suits brought by West Virginia and Ohio residents over PFOA from the Parkersburg plant (Wikipedia, EHN, HPCBD). The reach of that settlement helped set the template for how the rest of the nation now weighs PFAS harm.

The 2024 limits West Virginia follows

West Virginia has not written its own enforceable PFAS maximum contaminant level as of 2026 and follows the federal EPA standard instead. The 2024 national rules impose enforceable limits of 4 ppt for PFOA and 4 ppt for PFOS, together with 10 ppt each for PFNA, PFHxS, and GenX. Given the valley's specific history with PFOA, that 4 ppt PFOA ceiling lands with particular force along the Ohio River corridor around Parkersburg.

How to remove PFAS from your water

Three treatment methods bring PFAS down dependably. Granular activated carbon (GAC) adsorbs long-chain compounds such as PFOA and performs well as a whole-house filter. Anion exchange resin captures PFAS as charged ions and is strong on the shorter-chain versions. Reverse osmosis (RO) filters through a dense membrane and provides the highest reduction achievable at a single tap.

Whether whole-house or point-of-use serves you best depends on your needs. A point-of-entry GAC or anion system treats water at every fixture, while a point-of-use RO focuses on drinking and cooking. In the Parkersburg area and across West Virginia, pairing a whole-house filter with an under-sink RO produces thorough, layered coverage.

Confirm your level with a test

PFAS betray no taste or smell, so testing is the only way to know where you stand. Request your utility's latest PFAS results, and if you rely on a private well, use a certified laboratory that reports each regulated compound. Base your system on those results rather than on the region's reputation alone. And remember that PFAS filtration media do not last forever: carbon and anion resin gradually reach capacity while RO membranes lose efficiency, so plan on periodic retesting and timely media or cartridge changes to keep your water below the federal limits.

Choosing treatment along the Ohio River corridor

West Virginia's history makes the buying decision unusually concrete, because PFOA is the compound most likely to headline a test near Parkersburg, and PFOA is precisely what granular activated carbon handles well. A home in the corridor with a documented PFOA reading is a strong candidate for a whole-house catalytic-carbon or anion system sized to its flow, finished with an under-sink RO for drinking and ice; that layered approach covers both the household water used for bathing and laundry and the smaller volume you actually consume. Farther from the plant, or on a supply reporting non-detects, a point-of-use RO alone may be all the reassurance you need. Whatever your situation, base the purchase on a certified panel that separates the individual compounds rather than on the valley's reputation, factor in local hardness or sediment that can shorten media life, and keep a retesting schedule. The legacy here is real, but your own numbers, not the region's past, should decide the system you install.

For help matching treatment to your test, see our PFAS water filter removal guide.