The Frigidaire Puresource Ultra ULTRAWF is NSF 53 certified, which means that it reduces the following contaminants:
- Chlorine taste and odor
- Chlorobenzene
- Cysts
- 2,4-D
- Alachlor
- Atrazine
- Lead
- Mercury
- Lindane
- O-Dichlorobenzene
- Toxaphene (Pesticide)
- Particulate class I
- Turbidity
- Styrene
- Tetrachloroethylene