Full list of Water Test contaminants
|
Contaminant
|
MCL1 or TT1 (mg/L)2
|
|
Antimony
|
0.006
|
|
Arsenic
|
0.010
|
|
Asbestos (fibers > 10 micrometers)
|
7 million fibers per liter (MFL)
|
|
Barium
|
2.0
|
|
Beryllium
|
0.004
|
|
Cadmium
|
0.005
|
|
Chromium (total)
|
0.1
|
|
Copper
|
TT5; Action level = 1.3
|
|
Cyanide (as free cyanide)
|
0.2
|
|
Fluoride
|
4.0
|
|
Lead
|
5
TT ; Action level =
0.015
|
|
Mercury (inorganic)
|
0.002
|
|
Nitrate (measured as
Nitrogen)
|
10.0
|
|
Nitrite (measured as
Nitrogen)
|
1.0
|
|
Selenium
|
0.05
|
|
Thallium
|
0.002
|
|
|
|
Contaminant
|
MCL1 or TT1 (mg/L)2
|
|
Chloramines (as Cl2)
|
MRDL=4.01
|
|
Chlorine (as Cl2)
|
MRDL=4.01
|
|
Chlorine dioxide (as ClO2)
|
MRDL=0.81
|
|
|
Microorganisms
|
Contaminant
|
MCL1 or TT1 (mg/L)2
|
|
Cryptosporidium
|
TT7
|
|
Fecal coliform and E. coli
|
MCL6
|
|
Giardia lamblia
|
TT7
|
|
Heterotrophic plate count (HPC)
|
TT7
|
|
Legionella
|
TT7
|
|
Total Coliforms
|
5.0%8
|
|
Turbidity
|
TT7
|
|
Viruses (enteric)
|
TT7
|
Disinfection Byproducts
Radionuclides
|
Contaminant
|
MCL1 or TT1 (mg/L)2
|
|
Alpha photon emitters
|
15 picocuries per liter
(pCi/L)
|
|
Beta photon emitters
|
4 millirems per year
|
|
226
Radium and Radium
228 (combined)
|
5 pCi/L
|
|
Uranium
|
30 ug/L
|
|
|
|
Contaminant
|
MCL1 or TT1 (mg/L)2
|
|
Bromate
|
0.010
|
|
Chlorite
|
1.0
|
|
Haloacetic acids (HAAs)
|
0.060
|
|
Total Trihalomethanes
(TTHMs)
|
0.080
|
Disinfectants
|
Contaminant
|
MCL1 or TT1 (mg/L)2
|
|
Dichloromethane
|
0.005
|
|
1,2-Dichloropropane
|
0.005
|
|
Di(2-ethylhexyl) adipate
|
0.4
|
|
Di(2-ethylhexyl)
phthalate
|
0.006
|
|
Dinoseb
|
0.007
|
|
Dioxin (2,3,7,8-TCDD)
|
0.00000003
|
|
Diquat
|
0.02
|
|
Endothall
|
0.1
|
|
Endrin
|
0.002
|
|
Epichlorohydrin
|
TT4
|
|
Ethylbenzene
|
0.7
|
|
Ethylene dibromide
|
0.00005
|
|
Glyphosate
|
0.7
|
|
Heptachlor
|
0.0004
|
|
Heptachlor epoxide
|
0.0002
|
|
Hexachlorobenzene
|
0.001
|
|
Hexachlorocyclo- pentadiene
|
0.05
|
|
|
|
Contaminant
|
MCL1 or TT1 (mg/L)2
|
|
Lindane
|
0.0002
|
|
Methoxychlor
|
0.04
|
|
Oxamyl (Vydate)
|
0.2
|
|
Pentachlorophenol
|
0.001
|
|
Picloram
|
0.5
|
|
Polychlorinated biphenyls
(PCBs)
|
0.0005
|
|
Simazine
|
0.004
|
|
Styrene
|
0.1
|
|
Tetrachloroethylene
|
0.005
|
|
Toluene
|
1.0
|
|
Toxaphene
|
0.003
|
|
2,4,5-TP (Silvex)
|
0.05
|
|
1,2,4-Trichlorobenzene
|
0.07
|
|
1,1,1-Trichloroethane
|
0.2
|
|
1,1,2-Trichloroethane
|
0.005
|
|
Trichloroethylene
|
0.005
|
|
Vinyl chloride
|
0.002
|
|
Xylenes (total)
|
10
|
|
|
Organic Chemicals
|
Contaminant
|
MCL1 or TT1 (mg/L)2
|
|
Acrylamide
|
TT4
|
|
Alachlor
|
0.002
|
|
Atrazine
|
0.003
|
|
Benzene
|
0.005
|
|
Benzo(a)pyrene (PAHs)
|
0.0002
|
|
Carbofuran
|
0.04
|
|
Carbon tetrachloride
|
0.005
|
|
Chlordane
|
0.002
|
|
Chlorobenzene
|
0.1
|
|
2,4-D
|
0.07
|
|
Dalapon
|
0.2
|
|
1,2-Dibromo-3- chloropropane (DBCP)
|
0.0002
|
|
o-Dichlorobenzene
|
0.6
|
|
p-Dichlorobenzene
|
0.075
|
|
1,2-Dichloroethane
|
0.005
|
|
1,1-Dichloroethylene
|
0.007
|
|
cis-1,2-Dichloroethylene
|
0.07
|
|
trans-1,2
Dichloroethylene
|
0.1
|
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