Geology Reference
In-Depth Information
TABLE 13.1 National Primary Drinking Water Standards for Selected Contaminants (USEPA, 2007
Contaminant
MCLG
1
MCL
1
Potential Health Effects
Contaminant Sources
Microbiological
5.0%
2
'
3
Coliforms (total)
0
Gastrointestinal Illness (Gil)
human/animal fecal waste
Cryptosporidium
0
Gil (diarrhea, vomiting, cramps)
human/animal fecal waste
TT
3
Giardia lamblia
0
Gil (diarrhea, vomiting, cramps)
human/animal fecal waste
TT
3
Legionella
0
Legionnaire's Disease
multiplies in heating sys.
TT
3
—
Turbidity
assoc. with microorganisms
soil runoff
TT
3
Viruses (enteric)
0
Gil (diarrhea, vomiting, cramps)
human/animal fecal waste
TT
3
Inorganics
Antimony
0.006
0.006
incr. blood cholesterol, deer, sugar
oil ref.; fire retard.; ceramics; solder
nde,
5
orchards, electronics
Arsenic
4
0.010
skin, circulatory, cancer
Asbestos
7 MFL
benign intestinal polyps
asbestos cement in water mains
7MFL
5
Barium
2
2
incr. blood pressure
drilling wastes; metal refin.; nde
Beryllium
0.004
0.004
Intestinal lesions
metal refin., defense industries.
Cadmium
0.005
0.005
kidney
galvanize pipes, battery waste
Chromium
0.1
0.1
dermatitis
steel and pulp mills, nde
Copper
1.3
Gil, liver, kidney
plumbing, nde
(1.3)TT
7
Cyanide (free)
0.2
0.2
nerve, thyroid problems
steel/metal/plastic/fertilizer fact.
Fluoride
4.0
4.0
bone disease, mottled teeth
additive, nde, aluminum waste
Lead
0
mental dev, kidney, blood pres.
plumbing, nde
(0.015) TT
7
Mercury (inorganic)
0.002
0.002
kidney
factories, landfills, farms, nde
Nitrate (as N)
10
10
<6 mos, illness/death, "blue-baby"
fertilizer, septic tanks, nde
Nitrite
1
1
<6 mos, illness/death, "blue-baby"
fertilizer, septic tanks, nde
Selenium
0.05
0.05
hair, fingernail loss, numbness, circ.
oil ref., mines, nde
Thallium
0.0005
0.002
hair loss; blood, kidney, liver
ore-proc, electron, glass and fact.
Radionuclides
Alpha particles
4
15 pCi/L
cancer risk
nde of radioactive mines
4
Beta particles
4 mrem/yr
cancer risk
decay radioactive mins.
Radium 226 + 228
4
5 pCi/L
cancer risk
nde
Uranium
0
30 ug/L
cancer risk; kidney toxicity
nde
Organic Chemicals
Atrizine
0.003
0.003
cardiovasc, repro. problems
herbicide runoff
Carbofuran
0.04
0.04
blood, nervous syst, repro.
soil fumigant (rice, alfalfa)
Chlordane
0
0.002
liver, nervous syst., cancer
residue of banned termiticide
2,4-D
0.07
0.07
liver, kidney, adrenal glands
herbicide runoff
Diquat
0.02
0.02
cataracts
herbicide runoff
