Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 611 - PRIMARY DRINKING WATER STANDARDS › Subpart AG - INTERIM LEAD AND COPPER RULES › Appendix A - Regulated Contaminants

Current through Register Vol. 48, No. 28, July 12, 2024
Microbiological Contaminants
Contaminant (units): Total Coliform
				  Bacteria
Traditional MCL in mg/l: TT
To convert for CCR, multiply by: -
MCL in CCR units: TT
MCLG: N/A
Major sources in drinking water: Naturally present
				  in the environment.
Health effects language: Use language found in
				  Section
				  611.883(h)(7)(A)(i)
Contaminant (units): E. coli
Traditional MCL in mg/l: 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.
To convert for CCR, multiply by: -
MCL in CCR units: 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.
MCLG: 0
Major sources in drinking water: Human and animal
				  fecal waste.
Health effects language: 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
				  special health risk for infants, young children, the elderly, and people with
				  severely-compromised immune systems.
Contaminant (units): Fecal Indicators (enterococci
				  or coliphage).
Traditional MCL in mg/l: TT.
To convert for CCR, multiply by: -
MCL in CCR units: TT.
MCLG: N/A
Major sources in drinking water: Human and animal
				  fecal waste.
Health effects language: 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.
Contaminant (units): Total organic carbon
				  (ppm)
Traditional MCL in mg/l: TT
To convert for CCR, multiply by: -
MCL in CCR units: TT
MCLG: N/A
Major sources in drinking water: Naturally present
				  in the environment.
Health effects language: Total organic carbon
				  (TOC) has no health effects. However, total organic carbon provides a medium
				  for the formation of disinfection byproducts. These byproducts include
				  trihalomethanes (THMs) and haloacetic acids (HAAs). Drinking water containing
				  these byproducts 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.
Contaminant (units): Turbidity (NTU)
Traditional MCL in mg/l: TT
To convert for CCR, multiply by: -
MCL in CCR units: TT
MCLG: N/A
Major sources in drinking water: Soil
				  runoff.
Health effects language: 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
Contaminant (units): Beta/photon emitters
				  (mrem/yr)
Traditional MCL in mg/l: 4 mrem/yr
To convert for CCR, multiply by: -
MCL in CCR units: 4
MCLG: 0
Major sources in drinking water: Decay of natural
				  and man-made deposits.
Health effects language: Certain minerals are
				  radioactive and may emit forms of radiation known as photons and beta
				  radiation. Some people who drink water containing beta particle and photon
				  radioactivity in excess of the MCL over many years may have an increased risk
				  of getting cancer.
Contaminant (units): Alpha emitters (pCi/l)
Traditional MCL in mg/l: 15 pCi/l
To convert for CCR, multiply by: -
MCL in CCR units: 15
MCLG: 0
Major sources in drinking water: Erosion of
				  natural deposits.
Health effects language: 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.
Contaminant (units): Combined radium
				  (pCi/l)
Traditional MCL in mg/l: 5 pCi/l
To convert for CCR, multiply by: -
MCL in CCR units: 5
MCLG: 0
Major sources in drinking water: Erosion of
				  natural deposits.
Health effects language: 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.
Contaminant (units): Uranium (µg/l)
Traditional MCL in mg/l: 30 µg/l
To convert for CCR, multiply by: -
MCL in CCR units: 30
MCLG: 0
Major sources in drinking water: Erosion of
				  natural deposits.
Health effects language: Some people who drink
				  water containing uranium in excess of the MCL over many years may have an
				  increased risk of getting cancer and kidney toxicity.
Inorganic Contaminants
Contaminant (units): Antimony (ppb)
Traditional MCL in mg/l: 0.006
To convert for CCR, multiply by: 1000
MCL in CCR units: 6
MCLG: 6
Major sources in drinking water: Discharge from
				  petroleum refineries; fire retardants; ceramics; electronics; solder.
Health effects language: 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.
Contaminant (units): Arsenic (ppb)
Traditional MCL in mg/l: 0.010
To convert for CCR, multiply by: 1000
MCL in CCR units: 50
MCLG: 0
Major sources in drinking water: Erosion of
				  natural deposits; runoff from orchards; runoff from glass and electronics
				  production wastes.
Health effects language: 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.
Contaminant (units): Asbestos (MFL)
Traditional MCL in mg/l: 7 MFL
To convert for CCR, multiply by: -
MCL in CCR units: 7
MCLG: 7
Major sources in drinking water: Decay of asbestos
				  cement water mains; erosion of natural deposits.
Health effects language: 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.
Contaminant (units): Barium (ppm)
Traditional MCL in mg/l: 2
To convert for CCR, multiply by: -
MCL in CCR units: 2
MCLG: 2
Major sources in drinking water: Discharge of
				  drilling wastes; discharge from metal refineries; erosion of natural
				  deposits.
Health effects language: Some people who drink
				  water containing barium in excess of the MCL over many years could experience
				  an increase in their blood pressure.
Contaminant (units): Beryllium (ppb)
Traditional MCL in mg/l: 0.004
To convert for CCR, multiply by: 1000
MCL in CCR units: 4
MCLG: 4
Major sources in drinking water: Discharge from
				  metal refineries and coal-burning factories; discharge from electrical,
				  aerospace, and defense industries.
Health effects language: Some people who drink
				  water containing beryllium well in excess of the MCL over many years could
				  develop intestinal lesions.
Contaminant (units): Bromate (ppb)
Traditional MCL in mg/l: 0.010
To convert for CCR, multiply by: 1000
MCL in CCR units: 10
MCLG: 0
Major sources in drinking water: By-product of
				  drinking water disinfection.
Health effects language: Some people who drink
				  water containing bromate in excess of the MCL over many years may have an
				  increased risk of getting cancer.
Contaminant (units): Cadmium (ppb)
Traditional MCL in mg/l: 0.005
To convert for CCR, multiply by: 1000
MCL in CCR units: 5
MCLG: 5
Major sources in drinking water: Corrosion of
				  galvanized pipes; erosion of natural deposits; discharge from metal refineries;
				  runoff from waste batteries and paints.
Health effects language: Some people who drink
				  water containing cadmium in excess of the MCL over many years could experience
				  kidney damage.
Contaminant (units): Chloramines (ppm)
Traditional MCL in mg/l: MRDL=4
To convert for CCR, multiply by: -
MCL in CCR units: MRDL=4
MCLG: MRDLG=4
Major sources in drinking water: Water additive
				  used to control microbes.
Health effects language: Some people who drink
				  water containing chloramines well in excess of the MRDL could experience
				  irritating effects to their eyes and nose. Some people who drink water
				  containing chloramines well in excess of the MRDL could experience stomach
				  discomfort or anemia.
Contaminant (units): Chlorine (ppm)
Traditional MCL in mg/l: MRDL=4
To convert for CCR, multiply by: -
MCL in CCR units: MRDL=4
MCLG: MRDLG=4
Major sources in drinking water: Water additive
				  used to control microbes.
Health effects language: Some people who drink
				  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.
Contaminant (units): Chlorine dioxide (ppb)
Traditional MCL in mg/l: MRDL=800
To convert for CCR, multiply by: 1000
MCL in CCR units: MRDL=800
MCLG: MRDLG=800
Major sources in drinking water: Water additive
				  used to control microbes.
Health effects language: Some infants and young
				  children who drink water containing chlorine dioxide well 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.
Contaminant (units): Chlorite (ppm)
Traditional MCL in mg/l: MRDL=1
To convert for CCR, multiply by: -
MCL in CCR units: MRDL=1
MCLG: MRDLG=0.8
Major sources in drinking water: By-product of
				  drinking water disinfection.
Health effects language: Some infants and young
				  children who drink water containing chlorite well 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.
Contaminant (units): Chromium (ppb)
Traditional MCL in mg/l: 0.1
To convert for CCR, multiply by: 1000
MCL in CCR units: 100
MCLG: 100
Major sources in drinking water: Discharge from
				  steel and pulp mills; erosion of natural deposits.
Health effects language: Some people who use water
				  containing chromium well in excess of the MCL over many years could experience
				  allergic dermatitis.
Contaminant (units): Copper (ppm)
Traditional MCL in mg/l: AL=1.3
To convert for CCR, multiply by: -
MCL in CCR units: AL=1.3
MCLG: 1.3
Major sources in drinking water: Corrosion of
				  household plumbing systems; erosion of natural deposits.
Health effects language: 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.
Contaminant (units): Cyanide (ppb)
Traditional MCL in mg/l: 0.2
To convert for CCR, multiply by: 1000
MCL in CCR units: 200
MCLG: 200
Major sources in drinking water: Discharge from
				  steel/metal factories; discharge from plastic and fertilizer factories.
Health effects language: 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.
Contaminant (units): Fluoride (ppm)
Traditional MCL in mg/l: 4
To convert for CCR, multiply by: -
MCL in CCR units: 4
MCLG: 4
Major sources in drinking water: Erosion of
				  natural deposits; water additive that promotes strong teeth; discharge from
				  fertilizer and aluminum factories.
Health effects language: 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 or pitting of the teeth, and occurs only in
				  developing teeth before they erupt from the gums.
Contaminant (units): Lead (ppb)
Traditional MCL in mg/l: AL=0.015
To convert for CCR, multiply by: 1000
MCL in CCR units: AL=15
MCLG: 0
Major sources in drinking water: Corrosion of
				  household plumbing systems; erosion of natural deposits.
Health effects language: Infants and children who
				  drink water containing lead in excess of the action level could experience
				  delays in their physical or mental development. Children could show slight
				  deficits in attention span and learning abilities. Adults who drink this water
				  over many years could develop kidney problems or high blood pressure.
Contaminant (units): Mercury (inorganic)
				  (ppb)
Traditional MCL in mg/l: 0.002
To convert for CCR, multiply by: 1000
MCL in CCR units: 2
MCLG: 2
Major sources in drinking water: Erosion of
				  natural deposits; discharge from refineries and factories; runoff from
				  landfills; runoff from cropland.
Health effects language: Some people who drink
				  water containing inorganic mercury well in excess of the MCL over many years
				  could experience kidney damage.
Contaminant (units): Nitrate (ppm)
Traditional MCL in mg/l: 10
To convert for CCR, multiply by: -
MCL in CCR units: 10
MCLG: 10
Major sources in drinking water: Runoff from
				  fertilizer use; leaching from septic tanks, sewage; erosion of natural
				  deposits.
Health effects language: 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.
Contaminant (units): Nitrite (ppm)
Traditional MCL in mg/l: 1
To convert for CCR, multiply by: -
MCL in CCR units: 1
MCLG: 1
Major sources in drinking water: Runoff from
				  fertilizer use; leaching from septic tanks, sewage; erosion of natural
				  deposits.
Health effects language: 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.
Contaminant (units): Selenium (ppb)
Traditional MCL in mg/l: 0.05
To convert for CCR, multiply by: 1000
MCL in CCR units: 50
MCLG: 50
Major sources in drinking water: Discharge from
				  petroleum and metal refineries; erosion of natural deposits; discharge from
				  mines.
Health effects language: 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.
Contaminant (units): Thallium (ppb)
Traditional MCL in mg/l: 0.002
To convert for CCR, multiply by: 1000
MCL in CCR units: 2
MCLG: 0.5
Major sources in drinking water: Leaching from
				  ore-processing sites; discharge from electronics, glass, and drug
				  factories.
Health effects language: 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
Contaminant (units): 2,4-D (ppb)
Traditional MCL in mg/l: 0.07
To convert for CCR, multiply by: 1000
MCL in CCR units: 70
MCLG: 70
Major sources in drinking water: Runoff from
				  herbicide used on row crops.
Health effects language: 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.
Contaminant (units): 2,4,5-TP (silvex)
				  (ppb)
Traditional MCL in mg/l: 0.05
To convert for CCR, multiply by: 1000
MCL in CCR units: 50
MCLG: 50
Major sources in drinking water: Residue of banned
				  herbicide.
Health effects language: Some people who drink
				  water containing silvex in excess of the MCL over many years could experience
				  liver problems.
Contaminant (units): Acrylamide
Traditional MCL in mg/l: TT
To convert for CCR, multiply by: -
MCL in CCR units: TT
MCLG: 0
Major sources in drinking water: Added to water
				  during sewage/wastewater treatment.
Health effects language: 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 an increased
				  risk of getting cancer.
Contaminant (units): Alachlor (ppb)
Traditional MCL in mg/l: 0.002
To convert for CCR, multiply by: 1000
MCL in CCR units: 2
MCLG: 0
Major sources in drinking water: Runoff from
				  herbicide used on row crops.
Health effects language: 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.
Contaminant (units): Atrazine (ppb)
Traditional MCL in mg/l: 0.003
To convert for CCR, multiply by: 1000
MCL in CCR units: 3
MCLG: 3
Major sources in drinking water: Runoff from
				  herbicide used on row crops.
Health effects language: 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.
Contaminant (units): Benzo(a)pyrene (PAH)
				  (nanograms/l)
Traditional MCL in mg/l: 0.0002
To convert for CCR, multiply by: 1,000,000
MCL in CCR units: 200
MCLG: 0
Major sources in drinking water: Leaching from
				  linings of water storage tanks and distribution lines.
Health effects language: 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.
Contaminant (units): Carbofuran (ppb)
Traditional MCL in mg/l: 0.04
To convert for CCR, multiply by: 1000
MCL in CCR units: 40
MCLG: 40
Major sources in drinking water: Leaching of soil
				  fumigant used on rice and alfalfa.
Health effects language: Some people who drink
				  water containing carbofuran in excess of the MCL over many years could
				  experience problems with their blood, or nervous or reproductive
				  systems.
Contaminant (units): Chlordane (ppb)
Traditional MCL in mg/l: 0.002
To convert for CCR, multiply by: 1000
MCL in CCR units: 2
MCLG: 0
Major sources in drinking water: Residue of banned
				  termiticide.
Health effects language: 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.
Contaminant (units): Dalapon (ppb)
Traditional MCL in mg/l: 0.2
To convert for CCR, multiply by: 1000
MCL in CCR units: 200
MCLG: 200
Major sources in drinking water: Runoff from
				  herbicide used on rights of way.
Health effects language: Some people who drink
				  water containing dalapon well in excess of the MCL over many years could
				  experience minor kidney changes.
Contaminant (units): Di(2-ethylhexyl)adipate
				  (ppb)
Traditional MCL in mg/l: 0.4
To convert for CCR, multiply by: 1000
MCL in CCR units: 400
MCLG: 400
Major sources in drinking water: Discharge from
				  chemical factories.
Health effects language: 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.
Contaminant (units): Di(2-ethylhexyl)phthalate
				  (ppb)
Traditional MCL in mg/l: 0.006
To convert for CCR, multiply by: 1000
MCL in CCR units: 6
MCLG: 0
Major sources in drinking water: Discharge from
				  rubber and chemical factories.
Health effects language: 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 they may have an increased risk of getting cancer.
Contaminant (units): Dibromochloropropane (DBCP)
				  (ppt)
Traditional MCL in mg/l: 0.0002
To convert for CCR, multiply by: 1,000,000
MCL in CCR units: 200
MCLG: 0
Major sources in drinking water: Runoff/leaching
				  from soil fumigant used on soybeans, cotton, pineapples, and orchards.
Health effects language: 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.
Contaminant (units): Dinoseb (ppb)
Traditional MCL in mg/l: 0.007
To convert for CCR, multiply by: 1000
MCL in CCR units: 7
MCLG: 7
Major sources in drinking water: Runoff from
				  herbicide used on soybeans and vegetables.
Health effects language: Some people who drink
				  water containing dinoseb well in excess of the MCL over many years could
				  experience reproductive difficulties.
Contaminant (units): Diquat (ppb)
Traditional MCL in mg/l: 0.02
To convert for CCR, multiply by: 1000
MCL in CCR units: 20
MCLG: 20
Major sources in drinking water: Runoff from
				  herbicide use.
Health effects language: Some people who drink
				  water containing diquat in excess of the MCL over many years could get
				  cataracts.
Contaminant (units): Dioxin (2,3,7,8-TCDD)
				  (ppq)
Traditional MCL in mg/l: 0.00000003
To convert for CCR, multiply by:
				  1,000,000,000
MCL in CCR units: 30
MCLG: 0
Major sources in drinking water: Emissions from
				  waste incineration and other combustion; discharge from chemical
				  factories.
Health effects language: 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.
Contaminant (units): Endothall (ppb)
Traditional MCL in mg/l: 0.1
To convert for CCR, multiply by: 1000
MCL in CCR units: 100
MCLG: 100
Major sources in drinking water: Runoff from
				  herbicide use.
Health effects language: Some people who drink
				  water containing endothall in excess of the MCL over many years could
				  experience problems with their stomach or intestines.
Contaminant (units): Endrin (ppb)
Traditional MCL in mg/l: 0.002
To convert for CCR, multiply by: 1000
MCL in CCR units: 2
MCLG: 2
Major sources in drinking water: Residue of banned
				  insecticide.
Health effects language: Some people who drink
				  water containing endrin in excess of the MCL over many years could experience
				  liver problems.
Contaminant (units): Epichlorohydrin
Traditional MCL in mg/l: TT
To convert for CCR, multiply by: -
MCL in CCR units: TT
MCLG: 0
Major sources in drinking water: Discharge from
				  industrial chemical factories; an impurity of some water treatment
				  chemicals.
Health effects language: 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.
Contaminant (units): Ethylene dibromide
				  (ppt)
Traditional MCL in mg/l: 0.00005
To convert for CCR, multiply by: 1,000,000
MCL in CCR units: 50
MCLG: 0
Major sources in drinking water: Discharge from
				  petroleum refineries.
Health effects language: 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.
Contaminant (units): Glyphosate (ppb)
Traditional MCL in mg/l: 0.7
To convert for CCR, multiply by: 1000
MCL in CCR units: 700
MCLG: 700
Major sources in drinking water: Runoff from
				  herbicide use.
Health effects language: Some people who drink
				  water containing glyphosate in excess of the MCL over many years could
				  experience problems with their kidneys or reproductive difficulties.
Contaminant (units): Heptachlor (ppt)
Traditional MCL in mg/l: 0.0004
To convert for CCR, multiply by: 1,000,000
MCL in CCR units: 400
MCLG: 0
Major sources in drinking water: Residue of banned
				  pesticide.
Health effects language: 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.
Contaminant (units): Heptachlor epoxide
				  (ppt)
Traditional MCL in mg/l: 0.0002
To convert for CCR, multiply by: 1,000,000
MCL in CCR units: 200
MCLG: 0
Major sources in drinking water: Breakdown of
				  heptachlor.
Health effects language: Some people who drink
				  water containing heptachlor epoxide in excess of the MCL over many years could
				  experience liver damage, and may have an increased risk of getting
				  cancer.
Contaminant (units): Hexachlorobenzene
				  (ppb)
Traditional MCL in mg/l: 0.001
To convert for CCR, multiply by: 1000
MCL in CCR units: 1
MCLG: 0
Major sources in drinking water: Discharge from
				  metal refineries and agricultural chemical factories.
Health effects language: 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.
Contaminant (units): Hexachlorocyclopentadiene
				  (ppb)
Traditional MCL in mg/l: 0.05
To convert for CCR, multiply by: 1000
MCL in CCR units: 50
MCLG: 50
Major sources in drinking water: Discharge from
				  chemical factories.
Health effects language: Some people who drink
				  water containing hexachlorocyclopentadiene well in excess of the MCL over many
				  years could experience problems with their kidneys or stomach.
Contaminant (units): Lindane (ppt)
Traditional MCL in mg/l: 0.0002
To convert for CCR, multiply by: 1,000,000
MCL in CCR units: 200
MCLG: 200
Major sources in drinking water: Runoff/leaching
				  from insecticide used on cattle, lumber, gardens.
Health effects language: Some people who drink
				  water containing lindane in excess of the MCL over many years could experience
				  problems with their kidneys or liver.
Contaminant (units): Methoxychlor (ppb)
Traditional MCL in mg/l: 0.04
To convert for CCR, multiply by: 1000
MCL in CCR units: 40
MCLG: 40
Major sources in drinking water: Runoff/leaching
				  from insecticide used on fruits, vegetables, alfalfa, livestock.
Health effects language: Some people who drink
				  water containing methoxychlor in excess of the MCL over many years could
				  experience reproductive difficulties.
Contaminant (units): Oxamyl (vydate) (ppb)
Traditional MCL in mg/l: 0.2
To convert for CCR, multiply by: 1000
MCL in CCR units: 200
MCLG: 200
Major sources in drinking water: Runoff/leaching
				  from insecticide used on apples, potatoes and tomatoes.
Health effects language: Some people who drink
				  water containing oxamyl in excess of the MCL over many years could experience
				  slight nervous system effects.
Contaminant (units): PCBs (polychlorinated
				  biphenyls) (ppt)
Traditional MCL in mg/l: 0.0005
To convert for CCR, multiply by: 1,000,000
MCL in CCR units: 500
MCLG: 0
Major sources in drinking water: Runoff from
				  landfills; discharge of waste chemicals.
Health effects language: 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.
Contaminant (units): Pentachlorophenol
				  (ppb)
Traditional MCL in mg/l: 0.001
To convert for CCR, multiply by: 1000
MCL in CCR units: 1
MCLG: 0
Major sources in drinking water: Discharge from
				  wood preserving factories.
Health effects language: Some people who drink
				  water containing pentachlorophenol in excess of the MCL over many years could
				  experience problems with their liver or kidneys, and may have an increased risk
				  of getting cancer.
Contaminant (units): Picloram (ppb)
Traditional MCL in mg/l: 0.5
To convert for CCR, multiply by: 1000
MCL in CCR units: 500
MCLG: 500
Major sources in drinking water: Herbicide
				  runoff.
Health effects language: Some people who drink
				  water containing picloram in excess of the MCL over many years could experience
				  problems with their liver.
Contaminant (units): Simazine (ppb)
Traditional MCL in mg/l: 0.004
To convert for CCR, multiply by: 1000
MCL in CCR units: 4
MCLG: 4
Major sources in drinking water: Herbicide
				  runoff.
Health effects language: Some people who drink
				  water containing simazine in excess of the MCL over many years could experience
				  problems with their blood.
Contaminant (units): Toxaphene (ppb)
Traditional MCL in mg/l: 0.003
To convert for CCR, multiply by: 1000
MCL in CCR units: 3
MCLG: 0
Major sources in drinking water: Runoff/leaching
				  from insecticide used on cotton and cattle.
Health effects language: 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
Contaminant (units): Benzene (ppb)
Traditional MCL in mg/l: 0.005
To convert for CCR, multiply by: 1000
MCL in CCR units: 5
MCLG: 0
Major sources in drinking water: Discharge from
				  factories; leaching from gas storage tanks and landfills.
Health effects language: 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.
Contaminant (units): Carbon tetrachloride
				  (ppb)
Traditional MCL in mg/l: 0.005
To convert for CCR, multiply by: 1000
MCL in CCR units: 5
MCLG: 0
Major sources in drinking water: Discharge from
				  chemical plants and other industrial activities.
Health effects language: Some people who drink
				  water containing carbon tetrachloride in excess of the MCL over many years
				  could experience problems with their liver and may have an increased risk of
				  getting cancer.
Contaminant (units): Chlorobenzene (ppb)
Traditional MCL in mg/l: 0.1
To convert for CCR, multiply by: 1000
MCL in CCR units: 100
MCLG: 100
Major sources in drinking water: Discharge from
				  chemical and agricultural chemical factories.
Health effects language: Some people who drink
				  water containing chlorobenzene in excess of the MCL over many years could
				  experience problems with their liver or kidneys.
Contaminant (units): o-Dichlorobenzene
				  (ppb)
Traditional MCL in mg/l: 0.6
To convert for CCR, multiply by: 1000
MCL in CCR units: 600
MCLG: 600
Major sources in drinking water: Discharge from
				  industrial chemical factories.
Health effects language: Some people who drink
				  water containing o-dichlorobenzene well in excess of the MCL over many years
				  could experience problems with their liver, kidneys, or circulatory
				  systems.
Contaminant (units): p-Dichlorobenzene
				  (ppb)
Traditional MCL in mg/l: 0.075
To convert for CCR, multiply by: 1000
MCL in CCR units: 75
MCLG: 75
Major sources in drinking water: Discharge from
				  industrial chemical factories.
Health effects language: 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.
Contaminant (units): 1,2-Dichloroethane
				  (ppb)
Traditional MCL in mg/l: 0.005
To convert for CCR, multiply by: 1000
MCL in CCR units: 5
MCLG: 0
Major sources in drinking water: Discharge from
				  industrial chemical factories.
Health effects language: 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.
Contaminant (units): 1,1-Dichloroethylene
				  (ppb)
Traditional MCL in mg/l: 0.007
To convert for CCR, multiply by: 1000
MCL in CCR units: 7
MCLG: 7
Major sources in drinking water: Discharge from
				  industrial chemical factories.
Health effects language: Some people who drink
				  water containing 1,1-dichloroethylene in excess of the MCL over many years
				  could experience problems with their liver.
Contaminant (units): cis-1,2-Dichloroethylene
				  (ppb)
Traditional MCL in mg/l: 0.07
To convert for CCR, multiply by: 1000
MCL in CCR units: 70
MCLG: 70
Major sources in drinking water: Discharge from
				  industrial chemical factories.
Health effects language: Some people who drink
				  water containing cis-1,2-dichloroethylene in excess of the MCL over many years
				  could experience problems with their liver.
Contaminant (units): trans-1,2-Dichloroethylene
				  (ppb)
Traditional MCL in mg/l: 0.1
To convert for CCR, multiply by: 1000
MCL in CCR units: 100
MCLG: 100
Major sources in drinking water: Discharge from
				  industrial chemical factories.
Health effects language: Some people who drink
				  water containing trans-1,2-dichloroethylene well in excess of the MCL over many
				  years could experience problems with their liver.
Contaminant (units): Dichloromethane (ppb)
Traditional MCL in mg/l: 0.005
To convert for CCR, multiply by: 1000
MCL in CCR units: 5
MCLG: 0
Major sources in drinking water: Discharge from
				  pharmaceutical and chemical factories.
Health effects language: Some people who drink
				  water containing dichloromethane in excess of the MCL over many years could
				  have liver problems and may have an increased risk of getting cancer.
Contaminant (units): 1,2-Dichloropropane
				  (ppb)
Traditional MCL in mg/l: 0.005
To convert for CCR, multiply by: 1000
MCL in CCR units: 5
MCLG: 0
Major sources in drinking water: Discharge from
				  industrial chemical factories.
Health effects language: Some people who drink
				  water containing 1,2-dichloropropane in excess of the MCL over many years may
				  have an increased risk of getting cancer.
Contaminant (units): Ethylbenzene (ppb)
Traditional MCL in mg/l: 0.7
To convert for CCR, multiply by: 1000
MCL in CCR units: 700
MCLG: 700
Major sources in drinking water: Discharge from
				  petroleum refineries.
Health effects language: Some people who drink
				  water containing ethylbenzene well in excess of the MCL over many years could
				  experience problems with their liver or kidneys.
Contaminant (units): Haloacetic acids (HAA5)
				  (ppb)
Traditional MCL in mg/l: 0.060
To convert for CCR, multiply by: 1000
MCL in CCR units: 60
MCLG: N/A
Major sources in drinking water: Byproduct of
				  drinking water disinfection.
Health effects language: Some people who drink
				  water containing haloacetic acids in excess of the MCL over many years may have
				  an increased risk of getting cancer.
Contaminant (units): Styrene (ppb)
Traditional MCL in mg/l: 0.1
To convert for CCR, multiply by: 1000
MCL in CCR units: 100
MCLG: 100
Major sources in drinking water: Discharge from
				  rubber and plastic factories; leaching from landfills.
Health effects language: 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.
Contaminant (units): Tetrachloroethylene
				  (ppb)
Traditional MCL in mg/l: 0.005
To convert for CCR, multiply by: 1000
MCL in CCR units: 5
MCLG: 0
Major sources in drinking water: Discharge from
				  factories and dry cleaners.
Health effects language: 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.
Contaminant (units): 1,2,4-Trichlorobenzene
				  (ppb)
Traditional MCL in mg/l: 0.07
To convert for CCR, multiply by: 1000
MCL in CCR units: 70
MCLG: 70
Major sources in drinking water: Discharge from
				  textile-finishing factories.
Health effects language: 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.
Contaminant (units): 1,1,1-Trichloroethane
				  (ppb)
Traditional MCL in mg/l: 0.2
To convert for CCR, multiply by: 1000
MCL in CCR units: 200
MCLG: 200
Major sources in drinking water: Discharge from
				  metal degreasing sites and other factories.
Health effects language: 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.
Contaminant (units): 1,1,2-Trichloroethane
				  (ppb)
Traditional MCL in mg/l: 0.005
To convert for CCR, multiply by: 1000
MCL in CCR units: 5
MCLG: 3
Major sources in drinking water: Discharge from
				  industrial chemical factories.
Health effects language: 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.
Contaminant (units): Trichloroethylene
				  (ppb)
Traditional MCL in mg/l: 0.005
To convert for CCR, multiply by: 1000
MCL in CCR units: 5
MCLG: 0
Major sources in drinking water: Discharge from
				  metal degreasing sites and other factories.
Health effects language: 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.
Contaminant (units): TTHMs (total trihalomethanes)
				  (ppb)
Traditional MCL in mg/l: 0.10 /0.080
To convert for CCR, multiply by: 1000
MCL in CCR units: 100/80
MCLG: N/A
Major sources in drinking water: Byproduct of
				  drinking water disinfection.
Health effects language: 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 system, and
				  may have an increased risk of getting cancer.
Contaminant (units): Toluene (ppm)
Traditional MCL in mg/l: 1
To convert for CCR, multiply by: -
MCL in CCR units: 1
MCLG: 1
Major sources in drinking water: Discharge from
				  petroleum factories.
Health effects language: 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.
Contaminant (units): Vinyl Chloride (ppb)
Traditional MCL in mg/l: 0.002
To convert for CCR, multiply by: 1000
MCL in CCR units: 2
MCLG: 0
Major sources in drinking water: Leaching from PVC
				  piping; discharge from plastics factories.
Health effects language: Some people who drink
				  water containing vinyl chloride in excess of the MCL over many years may have
				  an increased risk of getting cancer.
Contaminant (units): Xylenes (ppm)
Traditional MCL in mg/l: 10
To convert for CCR, multiply by: -
MCL in CCR units: 10
MCLG: 10
Major sources in drinking water: Discharge from
				  petroleum factories; discharge from chemical factories.
Health effects language: Some people who drink
				  water containing xylenes in excess of the MCL over many years could experience
				  damage to their nervous system.
Key
Abbreviation
Meaning
AL
action level
MCL
maximum contaminant level
MCLG
maximum contaminant level goal
MFL
million fibers per liter
MRDL
maximum residual disinfectant level
MRDLG
maximum residual disinfectant level goal
mrem/year
millirems per year (a measure of radiation absorbed
							 by the body)
N/A
not applicable
NTU
nephelometric turbidity units (a measure of water
							 clarity)
pCi/l
picocuries per liter (a measure of
							 radioactivity)
ppm
parts per million, or milligrams per liter
							 (mg/l)
ppb
parts per billion, or micrograms per liter
							 (µg/l)
ppt
parts per trillion, or nanograms per liter
ppq
parts per quadrillion, or picograms per liter
TT
treatment technique
BOARD NOTE: Derived from appendix A to subpart O to 40 CFR
					 141.