Water Ingredients

Contaminants and minerals found in ranked waters and tap water systems — health guidelines, risks and which products contain each compound.

2,809 compounds272 contaminants2,537 minerals
#1

Calcium Chloride

Inorganics

Mineral
#2

Magnesium Chloride

Minerals

Mineral
#3

Potassium Bicarbonate

Minerals

Mineral
#4

Electrolytes

Minerals

Mineral
#5

Sodium Bicarbonate

Minerals

Mineral
#6

Magnesium Sulfate

Minerals

Mineral
#7

Bromide

Inorganics

Mineral
#8

Chloride

Minerals

Mineral
#9

Sulfate

Other

Mineral
#10

Total Trihalomethanes

Volatile Organic Compounds (VOCs)

Contaminant
#11

Sodium Sulfate

Inorganics

Mineral
#12

Gross Alpha

Inorganics

Contaminant
#13

Gross Beta

Radiological Elements

Contaminant
#14

Radium 226/228

Radiological Elements

Contaminant
#15

Silica

Inorganics

Mineral
#16

Arsenic

Heavy Metals

Contaminant
#17

Barium

Heavy Metals

Contaminant
#18

Fluoride

Fluoride

Mineral
#19

Nitrate (as NO₃⁻)

Inorganics

Mineral
#20

Uranium

Radiological Elements

Contaminant
#21

Dipotassium Phosphate

Inorganics

Mineral
#22

Bicarbonate Alkalinity (as HCO3)

Inorganics

Mineral
#23

Pink Himalayan Salt

Minerals

Mineral
#24

Bromodichloromethane

Disinfectant by-product

Contaminant
#25

Chloroform

Volatile Organic Compounds (VOCs)

Contaminant
#26

Dibromochloromethane

Disinfectant by-product

Contaminant
#27

Radon

Radiological Elements

Contaminant
#28

Potassium Chloride

Minerals

Mineral
#29

Chloramine

Chemical Disinfectants

Contaminant
#30

CO2

Inorganics

Mineral
#31

Haloacetic acids (HAA9)

Disinfectant by-product

Contaminant
#32

Haloacetic acids (HAA5)

Disinfectant by-product

Contaminant
#33

Chromium (hexavalent)

Heavy Metals

Contaminant
#34

Nitrite

Inorganics

Contaminant
#35

Bromate

Disinfectant by-product

Contaminant
#36

Calcium

Minerals

Mineral
#37

Magnesium

Minerals

Mineral
#38

Potassium

Minerals

Mineral
#39

Sodium

Minerals

Mineral
#40

Manganese

Minerals

Mineral
#41

Aluminum

Inorganics

Mineral
#42

Bromoform

Disinfectant by-product

Contaminant
#43

Dibromoacetic acid

Disinfectant by-product

Contaminant
#44

Dichloroacetic acid

Disinfectant by-product

Contaminant
#45

Trichloroacetic acid

Disinfectant by-product

Contaminant
#46

Nickel

Heavy Metals

Mineral
#47

Zinc

Minerals

Mineral
#48

Chlorine Dioxide

Chemical Disinfectants

Contaminant
#49

Chlorine

Chemical Disinfectants

Contaminant
#50

Lead

Heavy Metals

Contaminant
#51

Mercury

Heavy Metals

Contaminant
#52

Cadmium

Heavy Metals

Contaminant
#53

Copper

Minerals

Mineral
#54

Spring water

Other

Mineral
#55

1,4-Dioxane

Volatile Organic Compounds (VOCs)

Contaminant
#56

Bromochloroacetic acid

Disinfectant by-product

Contaminant
#57

PFAS

Perfluorinated Chemicals (PFAS)

Contaminant
#58

Tap water

Other

Mineral
#59

Benzene

Volatile Organic Compounds (VOCs)

Contaminant
#60

Asbestos

Radiological Elements

Contaminant
#61

Mineral Water

Other

Mineral
#62

Carbon Dioxide (CO2)

Inorganics

Mineral
#63

Boron

Minerals

Mineral
#64

Thallium

Heavy Metals

Contaminant
#65

Antimony

Heavy Metals

Contaminant
#66

Beryllium

Heavy Metals

Contaminant
#67

Iron

Minerals

Mineral
#68

Selenium

Minerals

Mineral
#69

Silver

Inorganics

Mineral
#70

Cyanide

Inorganics

Contaminant
#71

Carbon tetrachloride

Volatile Organic Compounds (VOCs)

Mineral
#72

Chlorate

Disinfectant by-product

Contaminant
#73

1,2,3-Trichloropropane

Volatile Organic Compounds (VOCs)

Contaminant
#74

1,2-Dibromo-3-chloropropane

Volatile Organic Compounds (VOCs)

Contaminant
#75

Tetrachloroethylene (perchloroethylene)

Volatile Organic Compounds (VOCs)

Contaminant
#76

Trichloroethylene

Volatile Organic Compounds (VOCs)

Contaminant
#77

Molybdenum

Minerals

Mineral
#78

Added Sugar

Sweeteners

Mineral
#79

Bisphenols

Microplastics

Contaminant
#80

Chlorodibromoacetic acid

Disinfectant by-product

Contaminant