South Carolina Code of Regulations › Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL › Subchapter 61-58.12 - Consumer Confidence Reports › Appendix 61-58.12.D - CONSUMER CONFIDENCE REPORTS: REGULATED CONTAMINANTS

Current through Register Vol. 48, No. 6, June 28, 2024
APPENDIX D. CONSUMER CONFIDENCE REPORTS: REGULATED
				CONTAMINANTS
Contaminant (units)
Traditional MCL in mg/L
To convert for CCR, multiply by
MCL in CCR units
MCLG
Major sources in drinking water
Health effects language
Microbiological contaminants:
Total Coliform Bacteria[Dagger]
MCL: (systems that collect >= 40 samples/month) 5%
							 of monthly samples are positive; (systems that collect <40 samples/month) 1
							 positive monthly sample.
MCL: (systems that collect >= 40 samples/mont h)
							 5% of monthly samples are positive; (systems that collect <40 samples/mont
							 h) 1 positive monthly sample.
0
Naturally present in the environment
Coliforms are bacteria that are naturally present in
							 the and are used as an indicator that other, potentially harmful bacteria may
							 be present. Coliforms were found in more samples than allowed and this was a
							 warning of potential problems.
Total Coliform Bacteria[Double
							 Dagger]
TT
N/A
Naturally present in the environment
Use language in R.51-58.12.
							 C(11)(g)(i)(A)
Fecal coliform and E. coli[Dagger]
0
0
0
Human and animal fecal waste
Fecal coliforms and E. Coli are bacteria whose
							 presence indicates that the water may be contaminated with human or animal
							 wastes. Microbes in these wastes can cause short-term effects, such as
							 diarrhea, cramps, nausea, headaches, or other symptoms. They may pose a special
							 health risk for infants, young children, some of the elderly, and people with
							 severely-compromised immune systems.
E. coli[Double Dagger]
Routine and repeat samples are total
							 coliform-positive and either is E. coli-positive or system fails to take repeat
							 samples following E. coli-positive routine sample or system fails to analyze
							 total coliform-positive repeat sample for E. coli
Routine and repeat samples are total
							 coliform-positive and either is E. coli-positive or system fails to take repeat
							 samples following E. coli-positive routine sample or system fails to analyze
							 total coliform-positive repeat sample for E. coli
0
Human and animal fecal waste
E. coli are bacteria whose presence indicates that
							 the water may be contaminated with human or animal wastes. Human pathogens in
							 these wastes can cause short-term effects, such as diarrhea, cramps, nausea,
							 headaches, or other symptoms. They may pose a greater health risk for infants,
							 young children, the elderly, and people with severely-compromised immune
							 systems.
Fecal Indicators (enterococci or
							 coliphage).
TT
TT
N/A
Human and animal fecal waste.
Fecal indicators are microbes whose presence
							 indicates that the water may be contaminated with human or animal wastes.
							 Microbes in these wastes can cause short-term health effects, such as diarrhea,
							 cramps, nausea, headaches, or other symptoms. They may pose a special health
							 risk for infants, young children, some of the elderly, and people with severely
							 compromised immune systems.
Total organic carbon (ppm)
TT
TT
N/A
Naturally present
Total organic carbon (TOC) has no health effects.
							 However, total organic carbon in the environment provides a medium for the
							 formation of disinfection by-products. These byproducts include trihalomethanes
							 (THMs) and haloacetic acids (HAAs). Drinking water containing these by-products
							 in excess of the MCL may lead to adverse health effects, liver or kidney
							 problems, or nervous system effects, and may lead to an increased risk of
							 getting cancer.
Turbidity (NTU)
TT
TT
N/A
Soil runoff
Turbidity has no health effects. However, turbidity
							 can interfere with disinfection and provide a medium for microbial growth.
							 Turbidity may indicate the presence of disease-causing organisms. These
							 organisms include bacteria, viruses, and parasites that can cause symptoms such
							 as nausea, cramps, diarrhea and associated headaches.
Radioactive contaminants:
Beta/photon emitters (mrem/yr)
4 mrem/yr
4
N/A
Decay of natural and man-made
							 deposits.
Certain minerals are radioactive and may emit forms
							 of radiation known as photons and beta radiation. Some people who drink water
							 containing beta and photon in excess of the MCL over many years may have an
							 increased risk of getting cancer.
Alpha emitters (pCi/L)
15 pCi/L
15
N/A
Erosion of natural deposits.
Certain minerals are radioactive and may emit a form
							 of radiation known as alpha radiation. Some people who drink water containing
							 alpha emitters in excess of the MCL over many years may have an increased risk
							 of getting cancer.
Combined radium (pCi/L)
5 pCi/L
5
N/A
Erosion of natural deposits.
Some people who drink water containing radium-226 or
							 228 in excess of the MCL over many years may have an increased risk of getting
							 cancer.
Uranium (pCi/L)
30 µg/L
30
0
Erosion of natural deposits.
Some people who drink water containing uranium in
							 excess of the MCL over many years may have an increased risk getting cancer and
							 kidney toxicity.
Inorganic contaminants:
Antimony (ppb)
.006
1000
6
6
Discharge from petroleum refineries; fire retardants;
							 ceramics; electronics; solder.
Some people who drink water containing antimony well
							 in excess of the MCL over many years could experience increases in blood
							 cholesterol and decreases in blood sugar.
Arsenic (ppb)
10.010
1000
110.
10
Erosion of natural deposits; Runoff from orchards;
							 Runoff from glass and electronics production wastes.
Some people who drink water containing arsenic in
							 excess of the MCL over many years could experience skin damage or problems with
							 their circulatory system, and may have an increased risk of getting
							 cancer.
Asbestos (MFL)
7 MFL
7
7
Decay of asbestos cement water mains; production
							 wastes; erosion of natural deposits.
Some people who drink water containing asbestos in
							 excess of the MCL over many years may have an increased risk of developing
							 benign intestinal polyps.
Barium (ppm)
2
2
2
Discharge of drilling; wastes; Discharge from metal
							 refineries; Erosion of natural deposits.
Some people who drink water containing barium in of
							 the MCL over many years could experience an increase in their blood
							 pressure.
Beryllium (ppb)
.004
1000
4
4
Discharge from metal refineries and coal-burning
							 factories;
Discharge from electrical, aerospace, and defense
							 industries
Some people who drink water containing beryllium well
							 in excess of the MCL over many years could develop intestinal
							 lesions
Bromate (ppb)
.010
1000
10
0
By-product of drinking water
							 chlorination.
Some people who drink water containing bromate in
							 excess of the MCL over many years may have an increased risk of getting
							 cancer.
Cadmium (ppb)
.005
1000
5
5
Corrosion of galvanized pipes; Erosion of natural
							 deposits;
Discharge from metal refineries; Runoff from waste
							 batteries and paints.
Some people who drink water containing cadmium in
							 excess of the MCL over many years could experience kidney damage.
Chloramines (ppm)
MRDL = 4
MRDL = 4
MRDLG = 4
Water additive used to control
							 microbes.
Some people who use water containing chloramines well
							 in excess of the MRDL could experience irritating to their eyes and nose. Some
							 people who drink water containing chloramines well in excess of the MRDL could
							 experience stomach discomfort or anemia.
Chlorine (ppm)
MRDL = 4
MRDL = 4
MRDLG = 4
Water additive used to control
							 microbes
Some people who use water containing chlorine well in
							 excess of the MRDL could experience irritating effects to their eyes and nose.
							 Some people who drink water containing chlorine well in excess of the MRDL
							 could experience stomach discomfort.
Chlorine dioxide (ppb)
MRDL = .8
1000
MRDL = 800
MRDLG = 800
Water additive used to control
							 microbes
Some infants and young children who drink water
							 containing chlorine dioxide in excess of the MRDL could experience nervous
							 system effects. Similar effects may occur in fetuses of pregnant women who
							 drink water containing chlorine dioxide in excess of the MRDL. Some people may
							 experience anemia.
Chlorite (ppm)
1
1
0.8
By-product of drinking water
							 chlorination.
Some infants and young children who drink water
							 containing chlorite in excess of the MCL could experience nervous system
							 effects. Similar effects may occur in fetuses of pregnant women who drink water
							 containing chlorite in excess of the MCL. Some people may experience
							 anemia.
Chromium (ppb)
.1
1000
100
100
Discharge from steel and pulp; mills; Erosion of
							 Natural deposits.
Some people who use water containing chromium well in
							 excess of the MCL over many years could experience allergic
							 dermatitis.
Copper (ppm)
AL=1.3
AL=1.3
1.3
Corrosion of household plumbing. Erosion of natural
							 deposits.
Copper is an essential nutrient, but some people who
							 drink water containing copper in excess of the action level over a relatively
							 short amount of time could experience gastrointestinal distress. Some people
							 who drink water containing copper in excess of the action level over many years
							 could suffer liver or kidney damage. People with Wilson's Disease should
							 consult their personal doctor.
Cyanide (ppb)
2
1000
200
200
Discharge from steel/metal factories;
Discharge from plastic and fertilizer
							 factories.
Some people who drink water containing cyanide well
							 in excess of the MCL over many years could experience nerve damage or problems
							 with their thyroid.
Fluoride (ppm)
4
4
4
Erosion of natural deposits; Water additive which
							 promotes strong teeth Discharge from fertilizer and aluminum
							 factories
Some people who drink water containing fluoride in
							 excess of the MCL over many years could get bone disease, including pain and
							 tenderness of the bones. Fluoride in drinking water at half the MCL or more may
							 cause mottling of children's teeth, usually in children less than nine years
							 old. Mottling, also known as dental fluorosis, may include brown staining
							 and/or pitting of the teeth, and occurs only in developing teeth before they
							 erupt from the gums.
Lead
AL=.015
1000
AL=15
0
Corrosion of household plumbing systems; Erosion of
							 natural deposits
Exposure to lead in drinking water can cause serious
							 health effects in all age groups. Infants and children can have decreases in IQ
							 and attention span. Lead exposure can lead to new learning and behavior
							 problems or exacerbate existing learning and behavior problems. The children of
							 women who are exposed to lead before or during pregnancy can have increased
							 risk of these adverse health effects. Adults can have increased risks of heart
							 disease, high blood pressure, kidney or nervous system problems.
Mercury [inorganic] (ppb)
.002
1000
2
2
Erosion of natural deposits; discharge from
							 refineries and factories; Runoff from landfills; Runoff from
							 cropland.
Some people who drink water containing inorganic
							 mercury well in excess of the MCL over many years could experience kidney
							 damage
Nitrate (ppm)
10
10
10
Runoff from fertilizer use; Leaching from septic
							 tanks, sewage; Erosion of natural deposits.
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.
Nitrite (ppm)
1
1
1
Runoff from fertilizer use; Leaching from septic
							 tanks sewage; Erosion of natural deposits
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.
Selenium (ppb)
.05
1000
50
50
Discharge from petroleum and metal refineries;
							 Erosion of natural deposits; Discharge from mines.
Selenium is an essential nutrient. However, some
							 people who drink water containing selenium in excess of the MCL over many years
							 could experience hair or fingernail losses, numbness in fingers or toes, or
							 problems with their circulation
Thallium (ppb)
.002
1000
2
0.5
Leaching from ore-processing sites; Discharge from
							 electronics, glass, and drug factories.
Some people who drink water containing thallium in
							 excess of the MCL over many years could experience hair loss, changes in their
							 blood, or problems with their kidneys, intestines, or liver.
Synthetic organic contaminants including pesticides
							 and herbicides:
2,4-D (ppb)
.07
1000
70
70
Runoff from herbicide used on row
							 crops.
Some people who drink water containing the weed
							 killer 2,4-D well in excess of the MCL over many years could experience
							 problems with their kidneys, liver, or adrenal glands.
2,4,5-TP [Silvex](ppb)
.05
1000
50
50
Residue of banned herbicide
Some people who drink water containing silvex in
							 excess of the MCL over many years could experience liver problems.
Acrylamide
TT
TT
0
Added to water during sewage/ wastewater
							 treatment.
Some people who drink water containing high levels of
							 acrylamide over a long period of time could have problems with their nervous
							 system or blood, and may have risk of getting cancer.
Alachlor (ppb)
.002
1000
2
0
Runoff from herbicide used on row
							 crops.
Some people who drink water containing alachlor in
							 excess of the MCL over many years could have problems with their eyes, liver,
							 kidneys, or spleen, or experience anemia, and may have an increased risk of
							 getting cancer.
Atrazine (ppb)
.003
1000
3
3
Runoff from herbicide used on row
							 crops.
Some people who drink water containing atrazine well
							 in excess of the MCL over many years could experience problems with their
							 cardiovascular system or reproductive difficulties.
Benzo(a)pyrene [PAH] (nanograms/l).
.0002
1,000,000
200
0
Leaching from linings of water storage tanks
							 distribution lines.
Some people who drink water containing benzo(a)pyrene
							 in excess of the MCL over many years may experience reproductive difficulties
							 and may have an increased risk of getting cancer.
Carbofuran (ppb)
.04
1000
40
40
Leaching of soil fumigant used on rice and
							 alfalfa.
Some people who drink carbofuran in excess of the MCL
							 over many years could experience problems with their blood, or nervous or
							 reproductive systems.
Chlordane (ppb)
.002
1000
2
0
Residue of banned termiticide
Some people who drink water containing chlordane in
							 excess of the MCL over many years could experience problems with their liver or
							 nervous system, and may have an increased risk of getting cancer.
Dalapon (ppb)
.2
1000
200
200
Runoff from herbicide used on rights of
							 way.
Some people who drink water containing dalapon well
							 in excess of the MCL over many years could experience minor kidney
							 changes.
Di(2-ethylhexyl) adipate (ppb).
.4
1000
400
400
Discharge from chemical factories.
Some people who drink water containing
							 di(2-ethylhexyl) adipate well in excess of the MCL over many years could
							 experience toxic effects such as weight loss, liver enlargement or possible
							 reproductive difficulties.
Di(2-ethylhexyl) phthalate (ppb).
.006
1000
6
0
Discharge from rubber and chemical
							 factories.
Some people who drink water containing
							 di(2-ethylhexyl) phthalate well in excess of the MCL over many years may have
							 problems with their liver, or experience reproductive difficulties, and may
							 have an increased risk of getting cancer.
Dibromochloropropane (ppt)
.0002
1,000,000
200
0
Runoff/leaching from soil fumigant used on soybeans,
							 cotton, pineapples, and orchards.
Some people who drink water containing DBCP in excess
							 of the MCL over many years could experience reproductive problems and may have
							 an increased risk of getting cancer.
Dinoseb (ppb)
.007
1000
7
7
Runoff from herbicide used on soybeans and
							 vegetables.
Some people who drink water containing dinoseb well
							 in excess of the MCL over many years could experience reproductive
							 difficulties.
Diquat (ppb)
.02
1000
20
20
Runoff from herbicide use.
Some people who drink water containing diquat in
							 excess of the MCL over many years could get cataracts.
Dioxin [2,3,7,8-TCDD] (ppq).
.00000003
1,000,000,000
30
0
Emissions from waste incineration and other
							 combustion; Discharge from chemical factories.
Some people who drink water containing dioxin in
							 excess of the MCL over many years could experience reproductive difficulties
							 and may have an increased risk of getting cancer.
Endothall (ppb)
.1
1000
100
100
Runoff from herbicide use.
Some people who drink water containing endothall in
							 excess of the MCL over many years could experience problems with their stomach
							 or intestines.
Endrin (ppb)
.002
1000
2
2
Residue of banned insecticide.
Some people who drink water containing endrin in
							 excess of the MCL over many years could experience liver problems.
Epichlorohydrin.
TT
TT
0
Discharge from industrial chemical factories; An
							 impurity of some water treatment chemicals.
Some people who drink water containing high levels of
							 epichlorohydrin over a long period of time could experience stomach problems,
							 and may have an increased risk of getting cancer.
Ethylene dibromide (ppt)
.00005
1,000,000
50
0
Discharge from petroleum refineries.
Some people who drink water containing ethylene
							 dibromide in excess of the MCL over many years could experience problems with
							 their liver, stomach, reproductive system, or kidneys, and may have an
							 increased risk of getting cancer.
Glyphosate (ppb)
.7
1000
700
700
Runoff from herbicide use
Some people who drink water containing glyphosate in
							 excess of the MCL over many years could experience problems with their kidneys
							 or reproductive difficulties.
Heptachlor (ppt)
.0004
1,000,000
400
0
Residue of banned pesticide.
Some people who drink water containing heptachlor in
							 excess of the MCL over many years could experience liver damage and may have an
							 increased risk of getting cancer.
Heptachlor epoxide (ppt)
.0002
1,000,000
200
0
Breakdown of heptachlor.
Some people who drink water containing heptachlor
							 epoxidein excess of the MCL over many years could experience liver damage, and
							 may have an increased risk of getting cancer.
Hexachlorobenzene (ppb)
.001
1000
1
0
Discharge from metal refineries and agricultural
							 chemical factories.
Some people who drink water containing
							 Hexachlorobenzene in excess of the MCL over many years could experience
							 problems with their liver or kidneys, or adverse reproductive effects and may
							 have an increased risk of getting cancer
Hexachlorocyclopentadiene (ppb)
.05
1000
50
50
Discharge from chemical factories
Some people who drink water containing
							 hexachlorocyclopentadiene well in excess of the MCL over many years could
							 experience problems with their kidneys or stomach.
Lindane (ppt)
.0002
1,000,000
200
200
Runoff/leaching from insecticide used on cattle,
							 lumber, gardens.
Some people who drink water containing lindane in
							 excess of the MCL over many years could experience problems with their kidneys
							 or liver.
Methoxychlor (ppb)
.04
1000
40
40
Runoff/leaching from insecticide used on fruits,
							 vegetables, alfalfa, livestock.
Some people who drink water containing methoxychlor
							 in excess of the MCL over many years could experience reproductive
							 difficulties
Oxamyl [Vydate] (ppb)
.2
1000
200
200
Runoff/leaching from insecticide used on apples
							 potatoes and tomatoes.
Some people who drink water containing oxamyl in
							 excess of the MCL over many years could experience slight nervous system
							 effects.
PCBs [Polychlorinated biphenyls]
							 (ppt).
.0005
1,000,000
500
0
Runoff from landfills Discharge of waste
							 chemicals
Some people who drink water containing PCBs in excess
							 of the MCL over many years could experience changes in their skin, problems
							 with their thymus gland, immune deficiencies, or reproductive or nervous system
							 difficulties, and may have an increased risk of getting cancer.
Pentachlorophenol (ppb)
.001
1000
1
0
Discharge from wood preserving
							 factories
Some people who drink water containing
							 pentachlorophenolin excess of the MCL over many years could experience problems
							 with their liver or kidneys, and may have an increased risk of getting
							 cancer.
Picloram (ppb)
.5
1000
500
500
Herbicide runoff
Some people who drink water containing picloram in
							 excess of the MCL over many years could experience problems with their
							 liver.
Simazine (ppb)
.004
1000
4
4
Herbicide runoff
Some people who drink water containing simazine in
							 excess of the MCL over many years could experience problems with their
							 blood.
Toxaphene (ppb)
.003
1000
3
0
Runoff/leaching from insecticide used on cotton and
							 cattle.
Some people who drink water containing toxaphene in
							 excess of the MCL over many years could have problems with their kidneys,
							 liver, or thyroid, and may have an increased risk of getting cancer
Volatile organic contaminants:
Benzene (ppb)
.005
1000
5
0
Discharge from factories; Leaching from gas storage
							 tanks and landfills.
Some people who drink water containing benzene in
							 excess of the MCL over many years could experience anemia or a decrease in
							 blood platelets, and may have an increased risk of getting cancer.
Carbon tetrachloride (ppb)
.005
1000
5
0
Discharge from chemical plants and other industrial
							 activities.
Some people who drink water containing carbon
							 tetrachloride in excess of the MCL over many years could experience problems
							 with in their liver and may have an increased risk of getting
							 cancer.
Chlorobenzene (ppb)
.1
1000
100
100
Discharge from chemical and agricultural chemical
							 factories
Some people who drink water containing chlorobenzene
							 in excess of the MCL over many years could experience problems with their liver
							 or kidneys.
o-Dichlorobenzene (ppb)
.6
1000
600
600
Discharge from industrial chemical
Some people who drink water containing
							 o-dichlorobenzene well in excess of the MCL over liver, kidneys, or circulatory
							 systems.
p-Dichlorobenzene (ppb)
.075
1000
75
75
Discharge from industrial chemical
							 factories
Some people who drink water containing
							 p-dichlorobenzene in excess of the MCL over many years could experience anemia,
							 damage to their liver, kidneys, or spleen, or changes in their
							 blood.
1,2-Dichloroethane (ppb)
.005
1000
5
0
Discharge from industrial chemical
							 factories.
Some people who drink water containing
							 1,2-dichloroethane in excess of the MCL over many years may have an increased
							 risk of getting cancer
1,1-Dichloroethylene (ppb)
.007
1000
7
7
Discharge from industrial chemical
							 factories.
Some people who drink water containing
							 1,1-dichloroethylene in excess of the MCL over many years could experience
							 problems with their liver.
cis-1,2-Dichloroethylene (ppb)
.07
1000
70
70
Discharge from industrial chemical
							 factories.
Some people who drink water containing
							 cis-1,2-dichloroethy -lene in excess of the MCL over many years could
							 experience problems with their liver.
trans-1,2-Dichloroethylene (ppb).
.1
1000
100
10
Discharge from industrial chemical
							 factories.
Some people who drink water containing
							 trans-1,2-dichloro-ethy lene well in excess of the MCL over many years could
							 experience problems with their liver.
Dichloromethane (ppb)
.005
1000
5
0
Discharge from pharmaceutical and chemical
							 factories
Some people who drink water containing
							 dichloromethane in excess of the MCL over many years could have liver problems
							 and may have an increase risk of getting cancer.
1,2-Dichloropropane (ppb)
.005
1000
5
0
Discharge from industrial chemical
							 factories.
Some people who drink water containing
							 1,2-Dichloropropane excess of the MCL over many years may have an increased
							 risk of getting cancer.
Ethylbenzene (ppb)
.7
1000
700
700
Discharge from petroleum refineries.
Some people who drink water containing ethylbenzene
							 well in excess of the MCL over many years could experience problems with their
							 liver or kidneys.
Haloacetic Acids (HAA) (ppb).
.060
1000
60
N/A
By-product of drinking water
							 disinfection.
Some people who drink water containing haloacetic
							 acids in excess of the MCL over many years may have an increased risk of
							 getting cancer.
Styrene (ppb)
.1
1000
100
100
Discharge from rubber and plastic factories and
							 leaching from landfills.
Some people who drink water containing styrene well
							 in excess of the MCL over many years could have problems with their liver,
							 kidneys or circulatory system.
Tetrachloroethylene (ppb)
.005
1000
5
0
Discharge from factories and dry
							 cleaners.
Some people who drink water containing
							 tetrachloroethylene in excess of the MCL over many years could have problems
							 with their liver, and may have an increased risk of getting cancer.
1,2,4-Trichlorobenzene (ppb)
.07
1000
70
70
Discharge from textile-finishing
							 factories.
Some people who drink water containing
							 1,2,4-trichlorobenzene well in excess of the MCL over many years could
							 experience changes in their adrenal glands.
1,1,1-Trichloroethane (ppb)
.2
1000
200
200
Discharge from metal degreasing sites and other
							 factories.
Some people who drink water containing
							 1,1,1-trichloroethane in excess of the MCL over many years could experience
							 problems with their liver, nervous system, or circulatory system.
1,1,2-Trichloroethane (ppb).
.005
1000
5
3
Discharge from industrial chemical
							 factories.
Some people who drink water containing
							 1,1,2-trichloroethane well in excess of the MCL over many years could have
							 problems with their liver, kidneys, or immune systems.
Trichloroethylene (ppb)
.005
1000
5
0
Discharge from metal degreasing sites and other
							 factories
Some people who drink water containing
							 trichloroethylene in excess of the MCL over many years could experience
							 problems with their liver and may have an increased risk of getting
							 cancer.
TTHMs [Total trihalomethanes] (ppb)
0.10/.080
1000
100/80
N/A
By-product of drinking water
							 disinfection.
Some people who drink water containing
							 trihalomethanes in excess of the MCL over many years may experience problems
							 with their liver, kidneys, or central nervous systems, and may have an
							 increased risk of getting cancer.
Toluene (ppm)
1
1
1
Discharge from petroleum factories.
Some people who drink water containing toluene well
							 in excess of the MCL over many years could have problems with their nervous
							 system, kidneys, or liver.
Vinyl Chloride (ppb)
.002
1000
2
0
Leaching from PVC piping; Discharge from from
							 plastics factories.
Some people who drink water containing vinyl chloride
							 in excess of the MCL over many years may have an increased risk of getting
							 cancer.
Xylenes (ppm)
10
10
10
Discharge from petroleum factories;
Discharge from chemical factories.
Some people who drink water containing xylenes in
							 excess of the MCL over many years could experience damage to their nervous
							 system.
Key:
AL=Action Level
MCLG=Maximum Contaminant Level Goal
MRDL=Maximum Residual Disinfectant Level
mrem/year=millirems per year (a measure of radiation absorbed
				by the body)
N/A=Not Applicable
pCi/l=picocuries per liter (a measure of radioactivity)
ppb=parts per billion, or micrograms per liter (µg/l)
MCL=Maximum Contaminant Level
MFL=million fibers per liter
MRDLG=Maximum Residual Disinfectant Level Goal
NTU=Nephelometric Turbidity Units (a measure of water
				clarity)
ppm=parts per million, or milligrams per liter (mg/L)
ppt=parts per trillion, or nanograms per liter
ppq=parts per quadrillion, or picograms per liter
TT=Treatment Technique
Appendix D to R.61-58.12 - endnotes
1These arsenic values are effective
				January 23, 2006. Until then, the MCL is 0.05 mg/L and there is no MCLG.
[Dagger]Until March 31, 2016
[Double Dagger]Beginning April 1, 2016