STEM water levels

	A	B	C	D	E
1	Contaminant	MCLG1 (mg/L)2	MCL or TT1 (mg/L)2	Potential Health Effects from Long-Term Exposure Above the MCL (unless specified as short-term)	Sources of Contaminant in Drinking Water
2	Microorganisms
3	Cryptosporidium	0	TT3	Gastrointestinal illness (such as diarrhea, vomiting, and cramps)	Human and animal fecal waste
4	Giardia lamblia	0	TT3	Gastrointestinal illness (such as diarrhea, vomiting, and cramps)	Human and animal fecal waste
5	Heterotrophic plate count (HPC)	n/a	TT3	HPC has no health effects; it is an analytic method used to measure the variety of bacteria that are common in water. The lower the concentration of bacteria in drinking water,the better maintained the water system is.	HPC measures a range of bacteria that are naturally present in the environment
6	Legionella	0	TT3	Legionnaire's Disease, a type of pneumonia	Found naturally in water; multiplies in heating systems
7	Total Coliforms (including fecal coliform and E. Coli)	0	5.0%4	Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present	Coliforms are naturally present in the environment; as well as feces; fecal coliforms and E. coli only come from human and animal fecal waste.
8	Turbidity	n/a	TT3	Turbidity is a measure of the cloudiness of water. It is used to indicate water quality and filtration effectiveness (such as whether disease-causing organisms are present).Higher turbidity levels are often associated with higher levels of disease-causing microorganisms such as viruses, parasites and some bacteria. These organisms can cause symptoms such as nausea, cramps, diarrhea, and associated headaches.	Soil runoff
9	Viruses (enteric)	0	TT3	Gastrointestinal illness (such as diarrhea, vomiting, and cramps)	Human and animal fecal waste
10	Disinfecton Byproducts
11	Bromate	0	0.01	Increased risk of cancer	Byproduct of drinking water disinfection
12	Chlorite	0.8	1	Anemia; infants and young children: nervous system effects	Byproduct of drinking water disinfection
13	Haloacetic acids (HAA5)	n/a6	0.06	Increased risk of cancer	Byproduct of drinking water disinfection
14	Total Trihalomethanes (TTHMs)	n/a6	0.08	Liver, kidney or central nervous system problems; increased risk of cancer	Byproduct of drinking water disinfection
15	Disinfectants
16	Chloramines (as Cl2)	MRDLG=41	MRDL=4.01	Eye/nose irritation; stomach discomfort, anemia	Water additive used to control microbes
17	Chlorine (as Cl2)	MRDLG=41	MRDL=4.01	Eye/nose irritation; stomach discomfort	Water additive used to control microbes
18	Chlorine dioxide (as ClO2)	MRDLG=0.81	MRDL=0.81	Anemia; infants and young children: nervous system effects	Water additive used to control microbes
19	Inorganic Chemicals
20	Antimony	0.006	0.006	Increase in blood cholesterol; decrease in blood sugar	Discharge from petroleum refineries; fire retardants; ceramics; electronics; solder
21	Arsenic	0	0.010 as of 01/23/06	Skin damage or problems with circulatory systems, and may have increased risk of getting cancer	Erosion of natural deposits; runoff from orchards, runoff from glass and electronics production wastes
22	Asbestos (fiber > 10 micrometers)	7 million fibers per liter (MFL)	7 MFL	Increased risk of developing benign intestinal polyps	Decay of asbestos cement in water mains; erosion of natural deposits
23	Barium	2	2	Increase in blood pressure	Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits
24	Beryllium	0.004	0.004	Intestinal lesions	Discharge from metal refineries and coal-burning factories; discharge from electrical, aerospace, and defense industries
25	Cadmium	0.005	0.005	Kidney damage	Corrosion of galvanized pipes; erosion of natural deposits; discharge from metal refineries; runoff from waste batteries and paints
26	Chromium	0.1	0.1	Allergic dermatitis	Discharge from steel and pulp mills; erosion of natural deposits
27	Copper	1.3	TT7; Action Level=1.3	Short term exposure: Gastrointestinal distress Long term exposure: Liver or kidney damage People with Wilson's Disease should consult their personal doctor if the amount of copper in their water exceeds the action level	Corrosion of household plumbing systems; erosion of natural deposits
28	Cyanide (as free cyanide)	0.2	0.2	Nerve damage or thyroid problems	Discharge from steel/metal factories; discharge from plastic and fertilizer factories
29	Fluoride	4	4	Bone disease (pain and tenderness of the bones); Children may get mottled teeth	Water additive which promotes strong teeth; erosion of natural deposits; discharge from fertilizer and aluminum factories
30	Lead	0	TT7; Action Level=0.015	Infants and children: Delays in physical or mental development; children could show slight deficits in attention span and learning abilities Adults: Kidney problems; high blood pressure	Corrosion of household plumbing systems; erosion of natural deposits
31	Mercury (inorganic)	0.002	0.002	Kidney damage	Erosion of natural deposits; discharge from refineries and factories; runoff from landfills and croplands
32	Nitrate (measured as Nitrogen)	10	10	Infants below the age of six months who drink water containing nitrate in excess of the MCL could become seriously ill and, if untreated, may die. Symptoms include shortness of breath and blue-baby syndrome.	Runoff from fertilizer use; leaking from septic tanks, sewage; erosion of natural deposits
33	Nitrite (measured as Nitrogen)	1	1	Infants below the age of six months who drink water containing nitrite in excess of the MCL could become seriously ill and, if untreated, may die. Symptoms include shortness of breath and blue-baby syndrome.	Runoff from fertilizer use; leaking from septic tanks, sewage; erosion of natural deposits
34	Selenium	0.05	0.05	Hair or fingernail loss; numbness in fingers or toes; circulatory problems	Discharge from petroleum refineries; erosion of natural deposits; discharge from mines
35	Thallium	0.0005	0.002	Hair loss; changes in blood; kidney, intestine, or liver problems	Leaching from ore-processing sites; discharge from electronics, glass, and drug factories
36	Organic Chemicals
37	Acrylamide	0	TT8	Nervous system or blood problems; increased risk of cancer	Added to water during sewage/wastewater treatment
38	Alachlor	0	0.002	Eye, liver, kidney or spleen problems; anemia; increased risk of cancer	Runoff from herbicide used on row crops
39	Atrazine	0.003	0.003	Cardiovascular system or reproductive problems	Runoff from herbicide used on row crops
40	Benzene	0	0.005	Anemia; decrease in blood platelets; increased risk of cancer	Discharge from factories; leaching from gas storage tanks and landfills
41	Benzo(a)pyrene (PAHs)	0	0.0002	Reproductive difficulties; increased risk of cancer	Leaching from linings of water storage tanks and distribution lines
42	Carbofuran	0.04	0.04	Problems with blood, nervous system, or reproductive system	Leaching of soil fumigant used on rice and alfalfa
43	Carbon tetrachloride	zero	0.005	Liver problems; increased risk of cancer	Discharge from chemical plants and other industrial activities
44	Chlordane	0	0.002	Liver or nervous system problems; increased risk of cancer	Residue of banned termiticide
45	Chlorobenzene	0.1	0.1	Liver or kidney problems	Discharge from chemical and agricultural chemical factories
46	2,4-D	0.07	0.07	Kidney, liver, or adrenal gland problems	Runoff from herbicide used on row crops
47	Dalapon	0.2	0.2	Minor kidney changes	Runoff from herbicide used on rights of way
48	1,2-Dibromo-3-chloropropane (DBCP)	0	0.0002	Reproductive difficulties; increased risk of cancer	Runoff/leaching from soil fumigant used on soybeans, cotton, pineapples, and orchards
49	o-Dichlorobenzene	0.6	0.6	Liver, kidney, or circulatory system problems	Discharge from industrial chemical factories
50	p-Dichlorobenzene	0.075	0.075	Anemia; liver, kidney or spleen damage; changes in blood	Discharge from industrial chemical factories
51	1,2-Dichloroethane	0	0.005	Increased risk of cancer	Discharge from industrial chemical factories
52	1,1-Dichloroethylene	0.007	0.007	Liver problems	Discharge from industrial chemical factories
53	cis-1,2-Dichloroethylene	0.07	0.07	Liver problems	Discharge from industrial chemical factories
54	trans-1,2-Dichloroethylene	0.1	0.1	Liver problems	Discharge from industrial chemical factories
55	Dichloromethane	0	0.005	Liver problems; increased risk of cancer	Discharge from drug and chemical factories
56	1,2-Dichloropropane	0	0.005	Increased risk of cancer	Discharge from industrial chemical factories
57	Di(2-ethylhexyl) adipate	0.4	0.4	Weight loss, liver problems, or possible reproductive difficulties.	Discharge from chemical factories
58	Di(2-ethylhexyl) phthalate	0	0.006	Reproductive difficulties; liver problems; increased risk of cancer	Discharge from rubber and chemical factories
59	Dinoseb	0.007	0.007	Reproductive difficulties	Runoff from herbicide used on soybeans and vegetables
60	Dioxin (2,3,7,8-TCDD)	0	0.00000003	Reproductive difficulties; increased risk of cancer	Emissions from waste incineration and other combustion; discharge from chemical factories
61	Diquat	0.02	0.02	Cataracts	Runoff from herbicide use
62	Endothall	0.1	0.1	Stomach and intestinal problems	Runoff from herbicide use
63	Endrin	0.002	0.002	Liver problems	Residue of banned insecticide
64	Epichlorohydrin	0	TT8	Increased cancer risk, and over a long period of time, stomach problems	Discharge from industrial chemical factories; an impurity of some water treatment chemicals
65	Ethylbenzene	0.7	0.7	Liver or kidneys problems	Discharge from petroleum refineries
66	Ethylene dibromide	zero	0.00005	Problems with liver, stomach, reproductive system, or kidneys; increased risk of cancer	Discharge from petroleum refineries
67	Glyphosate	0.7	0.7	Kidney problems; reproductive difficulties	Runoff from herbicide use
68	Heptachlor	0	0.0004	Liver damage; increased risk of cancer	Residue of banned termiticide
69	Heptachlor epoxide	0	0.0002	Liver damage; increased risk of cancer	Breakdown of heptachlor
70	Hexachlorobenzene	0	0.001	Liver or kidney problems; reproductive difficulties; increased risk of cancer	Discharge from metal refineries and agricultural chemical factories
71	Hexachlorocyclopentadiene	0.05	0.05	Kidney or stomach problems	Discharge from chemical factories
72	Lindane	0.0002	0.0002	Liver or kidney problems	Runoff/leaching from insecticide used on cattle, lumber, gardens
73	Methoxychlor	0.04	0.04	Reproductive difficulties	Runoff/leaching from insecticide used on fruits, vegetables, alfalfa, livestock
74	Oxamyl (Vydate)	0.2	0.2	Slight nervous system effects	Runoff/leaching from insecticide used on apples, potatoes, and tomatoes
75	Polychlorinated biphenyls (PCBs)	0	0.0005	Skin changes; thymus gland problems; immune deficiencies; reproductive or nervous system difficulties; increased risk of cancer	Runoff from landfills; discharge of waste chemicals
76	Pentachlorophenol	0	0.001	Liver or kidney problems; increased cancer risk	Discharge from wood preserving factories
77	Picloram	0.5	0.5	Liver problems	Herbicide runoff
78	Simazine	0.004	0.004	Problems with blood	Herbicide runoff
79	Styrene	0.1	0.1	Liver, kidney, or circulatory system problems	Discharge from rubber and plastic factories; leaching from landfills
80	Tetrachloroethylene	0	0.005	Liver problems; increased risk of cancer	Discharge from factories and dry cleaners
81	Toluene	1	1	Nervous system, kidney, or liver problems	Discharge from petroleum factories
82	Toxaphene	0	0.003	Kidney, liver, or thyroid problems; increased risk of cancer	Runoff/leaching from insecticide used on cotton and cattle
83	2,4,5-TP (Silvex)	0.05	0.05	Liver problems	Residue of banned herbicide
84	1,2,4-Trichlorobenzene	0.07	0.07	Changes in adrenal glands	Discharge from textile finishing factories
85	1,1,1-Trichloroethane	0.2	0.2	Liver, nervous system, or circulatory problems	Discharge from metal degreasing sites and other factories
86	1,1,2-Trichloroethane	0.003	0.005	Liver, kidney, or immune system problems	Discharge from industrial chemical factories
87	Trichloroethylene	0	0.005	Liver problems; increased risk of cancer	Discharge from metal degreasing sites and other factories
88	Vinyl chloride	0	0.002	Increased risk of cancer	Leaching from PVC pipes; discharge from plastic factories
89	Xylenes (total)	10	10	Nervous system damage	Discharge from petroleum factories; discharge from chemical factories
90	Radionuclides
91	Alpha particles	0	15 picocuries per Liter (pCi/L)	Increased risk of cancer	Erosion of natural deposits of certain minerals that are radioactive and may emit a form of radiation known as alpha radiation
92	Beta particles and photon emitters	0	4 millirems per year	Increased risk of cancer	Decay of natural and man-made deposits of certain minerals that are radioactive and may emit forms of radiation known as photons and beta radiation
93	Radium 226 and Radium 228 (combined)	0	5 pCi/L	Increased risk of cancer	Erosion of natural deposits
94	Uranium	0	30 ug/L as of 12/08/03	Increased risk of cancer, kidney toxicity	Erosion of natural deposits
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