PFOS in Wisconsin water
PFOS was detected in 5 of 95 Wisconsin cities with a published result, 5 of them with a sample above a 2024 EPA limit.
5 cities with a sample above a 2024 EPA limit
- HartfordAbove reference
- HartlandAbove reference
- La CrosseAbove reference
- MarshfieldAbove reference
- WestonAbove reference
Not detected or no usable result: 90 cities
- AllouezNot detected
- AppletonNot detected
- AshwaubenonNot detected
- BarabooNot detected
- Beaver DamNot detected
- BellevueNot detected
- BeloitNot detected
- BrookfieldNot detected
- Brown DeerNot detected
- BurlingtonNot detected
- CaledoniaNot detected
- CedarburgNot detected
- Chippewa FallsNot detected
- CudahyNot detected
- Darboy Sanitary DistNot detected
- De PereNot detected
- DeForestNot detected
- Eau ClaireNot detected
- ElkhornNot detected
- Fitchburg DistNot detected
- Fond Du LacNot detected
- Fort AtkinsonNot detected
- Fox Crossing EastNot detected
- Fox Crossing WestNot detected
- FranklinNot detected
- GermantownNot detected
- GlendaleNot detected
- GraftonNot detected
- Grand Chute Tn San DistNot detected
- Green BayNot detected
- GreendaleNot detected
- Greenville VilNot detected
- HarrisonNot detected
- HolmenNot detected
- HowardNot detected
- HudsonNot detected
- JanesvilleNot detected
- KaukaunaNot detected
- KenoshaNot detected
- Little ChuteNot detected
- MadisonNot detected
- ManitowocNot detected
- MarinetteNot detected
- MenashaNot detected
- Menomonee FallsNot detected
- MenomonieNot detected
- MequonNot detected
- MiddletonNot detected
- MilwaukeeNot detected
- MonroeNot detected
- MuskegoNot detected
- NeenahNot detected
- New BerlinNot detected
- New RichmondNot detected
- North ShoreNot detected
- Oak CreekNot detected
- OconomowocNot detected
- OnalaskaNot detected
- OregonNot detected
- OshkoshNot detected
- PlattevilleNot detected
- Pleasant PrairieNot detected
- PloverNot detected
- Port WashingtonNot detected
- PortageNot detected
- RacineNot detected
- ReedsburgNot detected
- River FallsNot detected
- SheboyganNot detected
- ShorewoodNot detected
- South MilwaukeeNot detected
- SpartaNot detected
- Stevens PointNot detected
- StoughtonNot detected
- Sun PrairieNot detected
- SuperiorNot detected
- SussexNot detected
- Two RiversNot detected
- VeronaNot detected
- WatertownNot detected
- WaukeshaNot detected
- WaunakeeNot detected
- WaupunNot detected
- WausauNot detected
- WauwatosaNot detected
- West AllisNot detected
- West BendNot detected
- Whitefish BayNot detected
- WhitewaterNot detected
- Wisconsin RapidsNot detected
Values are from the published EPA record; a contaminant that was never tested is shown as pending, never as a pass. A system-level result, not a measurement of any single home. That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation.
What can carry a PFOS reduction claim
- Reverse osmosis
Semi-permeable membrane separation removing dissolved minerals, heavy metals, and persistent fluorinated chemicals down to 0.0001 microns.
- Activated carbon (GAC)
Highly porous adsorption media targeting chlorine, disinfection byproducts, volatile organic compounds, and organic chemicals.
- Anion exchange
Synthetic polyvalent resin beads that exchange unwanted dissolved ionic contaminants for harmless benchmark ions.
Boiling does not remove a dissolved chemical compound and can concentrate it. Many pitcher and refrigerator filters carry no verified claim for a compound like this at all.
A finding establishes the need, the need names the capability, the capability requires a verified certification. No product appears before that sequence completes. Filter Finder →