Reverse osmosis & faucet filters typically do NOT filter out the following 100 contaminants:
(NOTE: As companies work to improve their product and
achieve certification with NSF for each contaminant, this list
may need updating. We are not responsible for old information.)

1,1,1-Trichloropropanone
1,1-Dichloropropanone
1,2,3-Trichloropropane
1,2-Diphenylhydrazine
1,3-Dichlorobenzene
2,4,6-Trichlorophenol
2,4-Dichlorophenol
2,4-Dimethylphenol
2,4-Dinitrophenol
2,4-Dinitrotoluene
2,6-Dinitrotoluene
2-Chloroethyl vinyl ether
2-Chloronaphthalene
2-Chlorophenol
2-Nitrophenol
3,3-Dichlorobenzidine
4,4-DDD
4,4-Dibromo-1,1-biphenyl
4,6-Dinitro-2-methyl phenol
4-Bromophenyl phenyl ether
4-Chloro-3-methyl phenol
4-Chlorophenyl phenyl ether
4-Nitrophenol
Acenaphthene
Acenaphthylene
Aldicarb (Temik)
Aldrin
alpha-BHC
alpha-Endosulfan
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
Benzo(b)fluoranthene
Benzo(ghi)perylene
Benzo(k)fluoroanthene
beta-BHC
beta-Endosulfan
Bis(2-chloroethoxy)methane
Bis(2-chloroethyl)ether
Bis(2-chloroisopropyl)ether
Bis(2-ethylhexyl)phthalate
Bromochloroacetonitrile
Bromodichloromethane
Bromoform
Butyl benzyl phthalate
Carbaryl
Chloral Hydrate
Chlordane
Chlorodibromomethane
Chloroform
Chlorpyrifos
Chrysene
cis-1,3-Dichloropropene
delta-BHC
Dibenzo(a,h)anthracene
Dibromoacetonitrile
Dichloroacetonitrile
Dieldrin
Diethyl phthalate
Dimethyl phthalate
Di-n-butyl phthalate
Di-n-octyl phthalate
Endosulfan Sulfate
Endrin Aldehyde
Fluoranthene
Fluorene
Guthion
Hexachlorobenzene
Hexachloroethane
Hydrocarbons (Gasoline, Kerosene, Diesel Fuel)
Isophorone
Malathion
Mercury
Microcystin LR
MTBE
Mutagen X (MX or 3-chloro-4-dichloromethyl-5-hydroxy-2[5H]-furanone)
Naphthalene
Nitrobenzene
N-Nitrosodi-n-propylamine
N-Nitrosodiphenylamine
Parathion
PCB-1016
PCB-1221
PCB-1232
PCB-1242
PCB-1248
PCB-1254
PCB-1260
Phenanthrene
Phenol
Pyrene
Strychnine
TCDD (2,3,7,8-Tetrachlorodibenzo-para-dioxin)
TCDF (2,3,7,8-Tetrachlorodibenzofuran)
Toxaphene
trans-1,3-Dichloropropene
Trichloroacetonitrile
Vinyl chloride
VOCs