Chemical or Substance
CAS RN
Health
Risk
Limit ug/L
ppbillion
Toxicologic
Endpoint
Acenaphthene
83-32-9
400
liver
Acetone
67-64-1
700
kidney
Alachlor
15972-60-8
4
cancer
Aldicarb
116-06-3
1
nervous system
Allyl chloride (3 chloropropene)
107-05-1
30
nervous system
Anthracene
120-12-7
2000
-----
Antimony
7440-36-0
6
-----
Atrazine
1912-24-9
20
cardiovascular system
Barium
7440-39-3
2000
cardiovascular system
Benzene
Benzene
10
cancer
Benzoic acid
65-85-0
30,000
------
Beryllium
7440-41-7
0.08
cancer
1,1-Biphenyl (Diphenyl)
92-52-4
300
kidney
Bis(chloroethyl)ether (BCEE)
111-44-4
0.3
cancer
Bis(chloromethyl)ether (BCME)
542-88-1
0.002
cancer
Boron
7440-42-8
600
male reproductive system
Bromodichloromethane
75-27-4
6
cancer
Bromoform
75-25-2
40
cancer
Bromomethane (Methyl bromide)
74-83-9
10
stomach
n-Butanol
71-36-3
700
nervous system
Butyl benzyl phthalate
85-68-7
100
------
Butylphthalyl butylglycolate (BPBG)
85-70-1
7000
-------
Cadmium
7440-43-9
4
kidney
Carbon disulfide
75-15-0
700
developmental effects
Carbon tetrachloride
56-23-5
3
cancer
Chloramben
133-90-4
100
liver
Chlorobenzene
108-90-7
100
liver
Chloroform
67-66-3
60
cancer
2-Chlorophenol
95-57-8
30
developmental effects
Chlorothalonil
1897-45-6
30
cancer
Chromium III
16065-83-1
20,000
---------
Chromium VI
18540-29-9
100
------
Cumene (Isopropyl benzene)
98-82-8
300*
------
Cyanide, free
57-12-5
100
endocrine system,
nervous system
Dibromochloromethane
124-48-1
10
liver
1,2-Dibromoethane (Ethylene dibromide,
EDB)
106-93-4
0.004
cancer
Dibutyl phthalate
84-74-2
700
-----
Dicamba
1918-00-9
200
developmental effects
1,2-Dichlorobenzene
95-50-1
600
liver
1,4-Dichlorobenzene (para)
106-46-7
10
cancer
3,3'-Dichlorobenzidine
91-94-1
0.8
cancer
Dichlorodifluoromethane
75-71-8
1000
------
p,p'-Dichlorodiphenyl dichloroethane (DDD)
72-54-8
1
cancer
p,p'-Dichlorodiphenyldichloroethylene
(DDE)
72-55-9
1
cancer
p,p'-Dichlorodiphenyltrichloroethane (DDT)
50-29-3
1
cancer
1,1-Dichloroethane
75-34-3
70
kidney
1,2-Dichloroethane
107-06-2
4
cancer
1,2-Dichloroethylene (cis)
156-59-2
70
hematologic system
1,1-Dichloroethylene (Vinylidene chloride)
75-35-4
6
liver
1,2-Dichloroethylene, trans-
156-60-5
100
-----
Dichloromethane (Methylene chloride)
75-09-2
50
cancer
2,4-Dichlorophenol
120-83-2
20
immune system
2,4-Dichlorophenoxyacetic acid (2,4-D)
94-75-7
70
hematologic system,
kidney, liver
1,2-Dichloropropane
78-87-5
5
cancer
1,3-Dichloropropene
542-75-6
2
cancer
Di(2-ethylhexyl)phthalate (DEHP)
117-81-7
20
cancer
Diethyl phthalate
84-66-2
6000
-----
2,4-Dimethylphenol
105-67-9
100
hematologic system,
nervous system
Dimethylphthalate
131-11-3
70,000
kidney
2,4-Dinitrophenol
51-28-5
10
eyes
Disulfoton
298-04-4
0.3
nervous system
Ethylbenzene
100-41-4
700
kidney, liver
S-Ethyl dipropylthiocarbamate (EPTC)
759-94-4
200
cardiovascular system,
nervous system
Ethyl ether
60-29-7
1000
-----
Ethylene glycol
107-21-1
10,000
kidney
Fluoranthene
206-44-0
300
kidney, liver
Fluorene (9H-Fluorene)
86-73-7
300
hematologic system
Formaldehyde
50-00-0
1000
stomach
Heptachlor
76-44-8
0.08
cancer
Heptachlor epoxide
1024-57-3
0.04
cancer
Hexachlorobenzene
118-74-1
0.2
cancer
Hexachlorobutadiene
87-68-3
1
kidney
Hexane (n-hexane)
110-54-3
400
nervous system
Isophorone
78-59-1
100
kidney
Linuron
330-55-2
1
hematologic system
Manganese
7439-96-5
100*
nervous system
Methanol
67-56-1
3000
liver, nervous system
2-Methyl-4-chlorophenoxyacetic acid
(MCPA)
94-74-6
3
kidney, liver
Methyl ethyl ketone (MEK, 2-butanone)
78-93-3
4000
developmental effects
Methyl isobutyl ketone (MIBK)
108-10-1
300
kidney, liver
2-Methylphenol (o-cresol)
95-48-7
30
nervous system
3-Methylphenol (m-cresol)
108-39-4
30
nervous system
4-Methylphenol (p-cresol)
106-44-5
3
---
Metolachlor
51218-45-2
100
developmental effects
Metribuzin
21087-64-9
200
kidney, liver
Naphthalene
91-20-3
300
------
Nickel, soluble salts
7440-02-0
100
-----
Nitrate (as nitrogen)
14797-55-8
10,000
hematologic system
N-Nitrosodiphenylamine
86-30-6
70
cancer
Pentachlorophenol
87-86-5
3
cancer
Phenol
108-95-2
4000
developmental effects
Picloram
1918-02-1
500
liver
Polychlorinated biphenyls (PCBs)
1336-36-3
0.04
cancer
Prometon
1610-18-0
100
---
Propachlor
1918-16-7
90
---
Pyrene
129-00-0
200
kidney
Selenium
7782-49-2
30
----
Silver
7440-22-4
30
-----
Simazine
122-34-9
30
hematologic system
1,1,1,2-Tetrachloroethane
630-20-6
70
kidney, liver
1,1,2,2-Tetrachloroethane
79-34-5
2
cancer
1,1,2,2-Tetrachloroethylene
127-18-4
7
cancer
Thallium salts
7440-28-0
0.6
liver
Tin
7440-31-5
4000
kidney, liver
Toluene
108-88-3
1000
kidney, liver
Toxaphene
8001-35-2
0.3
cancer
1,1,1-Trichloroethane
71-55-6
600
liver
1,1,2-Trichloroethane
79-00-5
3
liver
1,1,2-Trichloroethylene (TCE)
79-01-6
30**
cancer
Trichlorofluoromethane
75-69-4
2000
----
2,4,6-Trichlorophenol
88-06-2
30
cancer
2,4,5-Trichlorophenoxyacetic acid (2,4,5-T)
93-76-5
70
developmental effects,
hematologic system
2 (2,4,5-Trichlorophenoxy) propionic acid
93-72-1
60
liver
1,2,3-Trichloropropane
96-18-4
40
kidney, liver
1,1,2-Trichloro-1,2,2-trifluoroethane
76-13-1
200,000
-----
1,3,5-Trinitrobenzene
99-35-4
03**
-----
Vanadium
7440-62-2
50
-----
Vinyl chloride
75-01-4
0.2
cancer
Xylenes (mixture of isomers o, m, p)
1330-20-7
10,000
nervous system
Zinc
7440-66-6
2,000
------
       
                                                MINNESOTA DEPARTMENT OF HEALTH

Groundwater
Health Risk Limits
The following table is a list of the current Health Risk Limits for Groundwater and Toxicologic Endpoints (promulgated in
1993/94).
http://www.health.state.mn.us/divs/eh/groundwater/hrltable.html

What are VOCs?
Volatile Organic Chemicals (VOCs) are carbon-containing compounds that evaporate easily from water into air at normal
air temperatures. (This is why the distinctive odor of gasoline and many solvents can easily be detected.) VOCs are
contained in a wide variety of commercial, industrial and residential products including fuel oils, gasoline, solvents,
cleaners and degreasers, paints, inks, dyes, refrigerants and pesticides.  People are most commonly exposed to VOCs
through the air, in food, through skin contact, and potentially in drinking water supplies.

How do VOCs get into drinking water?
Most VOCs found in the environment result from human activity. When VOCs are spilled or improperly disposed of, a
portion will evaporate, but some will soak into the ground. In soil, VOCs may be carried deeper by rain, water or snow
melt and eventually reach the groundwater table. When VOCs migrate underground to nearby wells, they can eventually
end up in drinking water supplies.

How extensively are VOCs found in drinking water wells?
The U.S. Environmental Protection Agency (EPA) estimates that Volatile Organic Chemicals are present in one-fifth of
the nation's water supplies. Minnesota Department of Health (MDH) studies suggest that 3 - 6% of public water supplies
and about 2 - 4% of all water supplies in Minnesota contain detectable amounts of VOCs.

What are the health risks associated with VOC contamination?
VOCs vary considerably in their toxic (or harmful) effects. Researchers have collected an extensive amount of
information about the health effects of VOCs, from animals studies, and from studies of human exposures to large
quantities of chemicals in the workplace.

VOCs at levels higher than the HRLs may be harmful to the central nervous system, the kidneys or the liver. VOCs may
also cause irritation when they contact the skin, or may irritate mucous membranes if they are inhaled. Some VOCs are
known or suspected carcinogens (or cancer-causers).
http://www.health.state.mn.us/divs/eh/hazardous/topics/vocs.html