PFOS in Maryland water
PFOS was detected in 4 of 29 Maryland cities with a published result, 4 of them above the federal limit.
4 cities above the federal limit
Not detected or no usable result: 25 cities
- AnnapolisNot detected
- BaltimoreNot detected
- BowieNot detected
- Broad CreekNot detected
- CambridgeNot detected
- Chapel Hill - Aberdeen Proving GroundsNot detected
- Crofton-OdentonNot detected
- CumberlandNot detected
- EastonNot detected
- FrederickNot detected
- Freedom DistrictNot detected
- FrostburgNot detected
- Glen Burnie-BroadneckNot detected
- HagerstownNot detected
- Harford County D P WNot detected
- Havre De GraceNot detected
- Howard County D P W DistributionNot detected
- La PlataNot detected
- Lexington ParkNot detected
- New Design - Frederick CountyNot detected
- Ocean CityNot detected
- Ocean PinesNot detected
- RockvilleNot detected
- Waldorf - Charles CountyNot detected
- Washington Suburban SanitaryNot 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.
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 →