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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants


Find a Contaminant


December 2009

Look up drinking water contaminants in EWG's Tap Water Database. Find out where the contaminant comes from, its health risk and how to filter it out of your water.

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Unregulated Contaminants detected

1
  1,1,1,2-Tetrachloroethane
  1,1,1-Trichloroethane
  1,1,2,2-Tetrachloroethane
  1,1,2-Trichloroethane
  1,1-Dichloroethane
  1,1-Dichloroethylene
  1,1-Dichloropropanone
  1,1-Dichloropropene
  1,2,3-Trichlorobenzene
  1,2,3-Trichloropropane
  1,2,4-Trichlorobenzene
  1,2,4-Trimethylbenzene
  1,2-Dibromo-3-chloropropane (DBCP)
  1,2-Dichloroethane
  1,2-Dichloropropane
  1,3,5-Trimethylbenzene
  1,3-Dichloropropane
  1,3-Dichloropropene
  1,4-Dioxane
  1-Chlorobutane

2
  2,2-Dichloropropane
  2,3,7,8-TCDD (Dioxin)
  2,4,5-T
  2,4,5-TP (Silvex)
  2,4-D
  2,6-Dinitrotoluene
  2-Hexanone
  2-Methyl naphthalene

3
  3-Hydroxycarbofuran

4
  4-Methyl-2-pentanone

A
  Acenaphthene
  Acenaphthylene
  Acetaldhyde
  Acetochlor
  Acetone
  Acrylonitrile
  Alachlor (Lasso)
  Aldicarb
  Aldicarb sulfone
  Aldicarb sulfoxide
  Aldrin
  Alpha Chlordane
  Alpha particle activity
  Alpha particle activity (excl radon and uranium)
  Alpha particle activity (incl. radon & uranium)
  Alpha particle activity (suspended)
  Alpha, Dissolved
  alpha-Lindane
  Aluminum
  Anthracene
  Antimony (total)
  Aroclor 1016
  Aroclor 1221
  Aroclor 1232
  Aroclor 1242
  Aroclor 1248
  Aroclor 1254
  Aroclor 1260
  Arsenic (total)
  Asbestos
  Atrazine

B
  Barium (total)
  Bentazon (Basagran)
  Benzene
  Benzoic acid
  Benzo[a]anthracene
  Benzo[a]pyrene
  Benzo[b]fluoranthene
  Benzo[b]fluoranthene & Benzo[k]fluoranthene
  Benzo[g,h,i]perylene
  Benzo[k]fluoranthene
  Beryllium (total)
  beta-Lindane
  bis(2-chloroethyl) ether
  bis(2-ethylhexyl) phthalate
  Bromacil
  Bromate
  Bromide
  Bromide-82
  Bromobenzene
  Bromochloroacetic acid
  Bromochloromethane
  Bromodichloroacetic acid
  Bromodichloromethane
  Bromoform
  Bromomethane
  Butachlor
  Butanal
  Butane
  Butyl Benzylphthalate
  Butylate (Sutan)

C
  Cadmium (total)
  Caffeine
  Carbaryl
  Carbofuran
  Carbon tetrachloride
  Cesium-134
  Chloramine
  Chlorate
  Chlordane
  Chlorine dioxide
  Chlorite
  Chlorneb
  Chloroacetonitrile
  Chlorodibromoacetic acid
  Chlorodifluoromethane
  Chloroethane
  Chloroform
  Chloromethane
  Chromium (hexavalent)
  Chromium (total)
  Chrysene
  cis-1,2-Dichloroethylene
  cis-1,3-Dichloropropene
  Combined Radium (-226 & -228)
  Combined Uranium (mg/L)
  Combined Uranium (pCi/L)
  Copper
  Cyanazine (Bladex)
  Cyanide
  Cyanogen Chloride

D
  Dacthal
  Dalapon
  DCPA di acid degradate
  DCPA mono acid degradate
  delta-BHC
  Desethylatrazine
  Di(2-Ethylhexyl) adipate
  Di(2-ethylhexyl) phthalate
  Di-n-butylphthalate
  Di-n-octylphthalate
  Diazinon (Spectracide)
  Dibenzofuran
  Dibenz[a,h]anthracene
  Dibromoacetic acid
  Dibromochloromethane
  Dibromomethane
  Dicamba
  Dichloroacetic acid
  Dichloroacetonitrile
  Dichlorobenzenes (total)
  Dichlorobiphenyl
  Dichlorodifluoromethane
  Dichlorofluoromethane
  Dichloroiodomethane
  Dichloromethane (methylene chloride)
  Dieldrin
  Diethylphthalate
  Dimethylphthalate
  Dinoseb
  Diquat
  Diuron

E
  Endosulfan I
  Endosulfan II
  Endosulfan Sulfate
  Endothall
  Endrin
  Endrin Aldehyde
  EPTC (Eptam)
  Ethyl Acetate
  Ethyl ether
  Ethyl Methacrylate
  Ethyl-t-butyl ether (ETBE)
  Ethylbenzene
  Ethylene dibromide (EDB)
  Ethylene Glycol

F
  Fluometuron
  Fluoranthene
  Fluorene
  Foaming agents (surfactants)
  Formaldehyde

G
  Gamma Chlordane
  Glyoxal
  Glyphosate
  Gross beta particle & photon emitters (man-made)
  Gross beta particle activity (dissolved)
  Gross beta particle activity (mrem/yr)
  Gross beta particle activity (pCi/L)
  Gross beta particle activity (suspended)

H
  Heptachlor
  Heptachlor epoxide
  Heptanal
  Hexachlorobenzene (HCB)
  Hexachlorobutadiene
  Hexachlorocyclopentadiene
  Hexachloroethane
  Hexazinone
  Hydrogen sulfide

I
  Indeno[1,2,3-cd]pyrene
  Iodine-131
  Iodomethane
  Isophorone
  Isopropyl alcohol
  Isopropyl ether
  Isopropylbenzene

L
  Lead (total)
  Lindane
  Lithium

M
  m- & p- Xylene
  m-Dichlorobenzene
  m-Xylene
  Manganese
  Manganese, Dissolved
  Mercury (total inorganic)
  Merphos
  Methane
  Methomyl
  Methoxychlor
  Methyl Acetate
  Methyl acrylonitrile
  Methyl ethyl ketone
  Methyl isobutyl ketone
  Methyl methacrylate
  Metolachlor
  Metribuzin
  Mirex
  Molinate (Ordram)
  Molybdenum
  Monobromoacetic acid
  Monochloroacetic acid
  Monochlorobenzene (Chlorobenzene)
  MTBE

N
  n-Butylbenzene
  n-Hexane
  n-Nitroso di-N-Propylamine
  N-nitrosodi-n-butylamine (ndba)
  n-Nitrosodimethylamine
  N-nitrosopyrrolidine (npyr)
  n-Propylbenzene
  Naphthalene
  Nitrate
  Nitrate & nitrite
  Nitrite
  Nitrobenzene
  Nonanal

O
  o-Chlorotoluene
  o-Dichlorobenzene
  o-Xylene
  Oxamyl (Vydate)

P
  p,p'-DDT
  p-Chlorotoluene
  p-Dichlorobenzene
  p-Isopropyltoluene
  p-Xylene
  para-para DDD
  para-para DDE
  Paraquat
  Parathion (ethyl)
  PCB 1262
  Pentachlorophenol
  Pentanal
  Pentane
  Perchlorate
  Perfluorobutane Sulfonate (PFBS)
  Perfluorobutanoic Acid (PFBA)
  Perfluorohexane Sulfonate (PFHXS)
  Perfluorohexanoic Acid (PFXHA)
  Perfluorooctane Sulfonate (PFOS)
  Perfluorooctanoic Acid (PFOA)
  Perfluoropentanoic Acid (PFPEA)
  Phenanthrene
  Phenols
  Phosphorus
  Picloram
  Potassium-40 (total)
  Prometon
  Prometryn
  Propachlor
  Propanal
  Pyrene

R
  Radium-226
  Radium-228
  Radon

S
  sec-Butylbenzene
  Selenium (total)
  Silicon
  Silver (total)
  Simazine
  Strontium
  Strontium-89
  Strontium-90
  Styrene

T
  Tebuthiuron
  Tert-Amyl-Methyl Ether
  Tert-Butyl Alcohol
  tert-Butylbenzene
  Tetrachloroethylene
  Tetrahydrofuran
  Thallium (total)
  Thiobencarb (Bolero)
  Tin (total)
  Titanium
  Toluene
  Total haloacetic acids (HAAs)
  Total polychlorinated biphenyls (PCBs)
  Total trihalomethanes (TTHMs)
  Toxaphene
  trans-1,2-Dichloroethylene
  trans-1,3-Dichloropropene
  trans-1,4-Dichloro-2-butene
  Tribromoacetic acid
  Trichloroacetic acid
  Trichloroethylene
  Trichlorofluoromethane
  Trichlorotrifluoroethane
  Trifluralin
  Tritium

U
  Uranium-234
  Uranium-234 (pCi/L)
  Uranium-235
  Uranium-238
  Uranium-238 (pCi/L)

V
  Vanadium
  Vinyl chloride