Washington Administrative Code › Title 246 - Health, Department of › WATER SYSTEMS › Chapter 246-290 - Group A public water supplies › Part 7 - REPORTING › Subpart B - Consumer Confidence Reports › Section 246-290-72012 - Regulated contaminants

Current through Register Vol. 24-14, July 15, 2024
Contaminant
MCL or SAL (units match lab results)
To convert lab results for CCR, multiply by
MCL or SAL in CCR units
MCLG in CCR units
Major Sources in Drinking Water
Health Effects Language
Microbiological Contaminants
Total Coliform Bacteria
TT
-
TT
0
Naturally present in the environment
Coliforms are bacteria that are naturally present
								  in the environment and are used as an indicator that other, potentially
								  harmful, waterborne pathogens may be present or that a potential pathway exists
								  through which contamination may enter the drinking water distribution system.
								  We found coliforms indicating the need to look for potential problems in water
								  treatment or distribution. When this occurs, we are required to conduct
								  assessment(s) to identify problems and to correct any problems that were found
								  during these assessments.
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
.
-
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 (
E. coli
)
TT
-
TT
0
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
TT
-
TT
N/A
Naturally present in the environment
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.
Turbidity
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.
Giardia lamblia
Viruses
Cryptosporidium
TT
-
TT
0
Human and animal fecal waste
Inadequately treated water may contain
								  disease-causing organisms. These organisms include bacteria viruses, and
								  parasites which can cause symptoms such as nausea, cramps, diarrhea, and
								  associated headaches.
Heterotrophic plate count (HPC) bacteria
TT
-
TT
N/A
HPC measures a range of bacteria that are
								  naturally present in the environment
Inadequately treated water may contain
								  disease-causing organisms. These organisms include bacteria viruses, and
								  parasites which can cause symptoms such as nausea, cramps, diarrhea, and
								  associated headaches.
Legionella
TT
-
TT
0
Found naturally in water; multiplies in heating
								  systems
Inadequately treated water may contain
								  disease-causing organisms. These organisms include bacteria viruses, and
								  parasites which can cause symptoms such as nausea, cramps, diarrhea, and
								  associated headaches.
Radioactive Contaminants
Beta/photon emitters
4 mrem/yr
-
4 mrem/yr
0
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 emitters in excess of the MCL over many years
								  may have an increased risk of getting cancer.
Alpha emitters [gross alpha excluding uranium and
								  radon]
15 pCi/l
-
15 (pCi/L)
0
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 [226 & 228]
5 pCi/l
-
5 (pCi/L)
0
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
30 ppb
-
30 ppb
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 of getting cancer
								  and kidney toxicity.
Inorganic Contaminants
Antimony
.006 ppm
1000
6 ppb
6 ppb
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
0.010 ppm
1000
10 ppb
0
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
7 MFL
-
7 MFL
7 MFL
Decay of asbestos cement water mains; 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
2 ppm
-
2 ppm
2 ppm
Discharge of drilling wastes; Discharge from
								  metal refineries; Erosion of natural deposits
Some people who drink water containing barium in
								  excess of the MCL over many years could experience an increase in their blood
								  pressure.
Beryllium
.004 ppm
1000
4 ppb
4 ppb
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.
Cadmium
.005 ppm
1000
5 ppb
5 ppb
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.
Chromium
.1 ppm
1000
100 ppb
100 ppb
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
TT AL = 1.3 ppm
-
TT AL = 1.3 ppm
1.3 ppm
Corrosion of household plumbing systems; 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
.2 ppm
1000
200 ppb
200 ppb
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
4 ppm
-
4 ppm
4 ppm
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
TT AL = .015 ppm
1000
TT AL = 15 ppb
0
Corrosion of household plumbing systems; Erosion
								  of natural deposits
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.
Mercury [inorganic]
.002 ppm
1000
2 ppb
2 ppb
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
-
10.0 ppm
10.0 ppm
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
1.0 ppm
-
1.0 ppm
1.0 ppm
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
.05 ppm
1000
50 ppb
50 ppb
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
.002 ppm
1000
2 ppb
0.5 ppb
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.
Disinfection Byproducts (DBPs)
Bromate
.010 ppm
1000
10 ppb
0
Byproduct of drinking water disinfection
Some people who drink water containing bromate in
								  excess of the MCL over many years may have an increased risk of getting cancer.
Chloramines
MRDL = 4 ppm
-
MRDL = 4 ppm
MRDLG = 4 ppm
Water additive used to control microbes
Some people who use drinking 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.
Chlorine
MRDL = 4 ppm
-
MRDL = 4 ppm
MRDLG = 4 ppm
Water additive used to control microbes
Some people who use drinking 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.
Chlorite
1 ppm
-
1 ppm
0.8 ppm
Byproduct of drinking water disinfection
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 mothers who drink
								  water containing chlorite in excess of the MCL. Some people may experience
								  anemia.
Chlorine dioxide
MRDL = .8 ppm
1000
MRDL = 800 ppb
MRDLG = 800 ppb
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 mothers who
								  drink water containing chlorine dioxide in excess of the MRDL. Some people may
								  experience anemia.
Haloacetic Acids (HAA5)
60 ppb
-
60 ppb
N/A for combined dichloroacetic acid = 0;
								  monochloroacetic acid = 70 ppb; trichloroacetic acid = 20 ppb
Byproduct 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.
Total Trihalomethanes [TTHMs]
80 ppb
-
80 ppb
N/A (chloroform = 70 ppb; dibromochloromethane =
								  60 ppb; bromoform = 0; bromodichloromethane = 0)
Byproduct 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.
Synthetic Organic Contaminants including
								  Pesticides and Herbicides
2,4-D
70 ppb
-
70 ppb
70 ppb
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]
50 ppb
-
50 ppb
50 ppb
Residue of banned herbicide
Some people who drink water containing silvex in
								  excess of the MCL over many years could experience liver problems.
Alachlor
2 ppb
-
2 ppb
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
3 ppb
-
3 ppb
3 ppb
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]
.2 ppb
1000
200 ppt
0
Leaching from linings of water storage tanks and
								  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
40 ppb
-
40 ppb
40 ppb
Leaching of soil fumigant used on rice and
								  alfalfa
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.
Chlordane
2 ppb
-
2 ppb
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
200 ppb
-
200 ppb
200 ppb
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
400 ppb
-
400 ppb
400 ppb
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 or reproductive difficulties.
Di(2-ethylhexyl) phthalate
6 ppb
-
6 ppb
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 [DBCP]
.2 ppb
1000
200 ppt
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
7 ppb
-
7 ppb
7 ppb
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.
Dioxin [2,3,7,8-TCDD]
.03 ppt
1,000
30 ppb
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.
Diquat
.02 ppb
1000
20 ppt
20 ppt
Runoff from herbicide use
Some people who drink water containing diquat in
								  excess of the MCL over many years could get cataracts.
Endothall
100 ppb
-
100 ppb
100 ppb
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
2 ppb
-
2 ppb
2 ppb
Residue of banned insecticide
Some people who drink water containing endrin in
								  excess of the MCL over many years could experience liver problems.
Ethylene dibromide
.05 ppb
1000
50 ppt
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
700 ppb
-
700 ppb
700 ppb
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
.4 ppb
1000
400 ppt
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
.2 ppb
1000
200 ppt
0
Breakdown of heptachlor
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.
Hexachlorobenzene
1 ppb
-
1 ppb
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
50 ppb
-
50 ppb
50 ppb
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
.2 ppb
1000
200 ppt
200 ppt
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
40 ppb
-
40 ppb
40 ppb
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]
200 ppb
-
200 ppb
200 ppb
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]
.5 ppb
1000
500 ppt
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
1 ppb
-
1 ppb
0
Discharge from wood preserving factories
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.
PFOA
10 ppt
-
10 ppt
N/A
Run-off or leaching from fire-fighting foam,
								  industrial discharge, and landfills; wastewater treatment plants
Some people who drink water containing PFOA in
								  excess of the SAL over many years may experience problems with their
								  cholesterol, liver, thyroid or immune system; have high blood pressure during
								  pregnancy, have babies with lower birthweights; and be at higher risk of
								  getting certain types of cancers.
PFOS
15 ppt
-
15 ppt
N/A
Run-off or leaching from fire-fighting foam,
								  industrial discharge, and landfills; wastewater treatment plants
Some people who drink water containing PFOS in
								  excess of the SAL over many years may experience problems with their
								  cholesterol, liver, thyroid, kidney, or immune systems; or have children with
								  lower birth-weights.
PFHxS
65 ppt
-
65 ppt
N/A
Run-off or leaching from fire-fighting foam,
								  industrial discharge, and landfills; wastewater treatment plants
Some people who drink water containing PFHxS in
								  excess of the SAL over many years may experience liver or immune problems, or
								  thyroid hormone problems during pregnancy and infancy. It is possible that
								  exposed children may have increased risk of abnormal behavior.
PFNA
9 ppt
-
9 ppt
N/A
Run-off or leaching from fire-fighting foam,
								  industrial discharge, and landfills; wastewater treatment plants
Some people who drink water containing PFNA in
								  excess of the SAL over many years may experience cholesterol, immune, liver or
								  reproductive problems. Children exposed prenatally may have lower birthweights
								  and increased risk of abnormal development.
PFBS
345 ppt
-
345 ppt
N/A
Run-off or leaching from fire-fighting foam,
								  industrial discharge, and landfills; wastewater treatment plants
Some people who drink water containing PFBS in
								  excess of the SAL may experience higher risk of cholesterol, liver, kidney or
								  thyroid problems. Early life is the most sensitive period for altered thyroid
								  hormone; sensitive populations include persons who are pregnant, nursing or
								  less than a year old.
Picloram
500 ppb
-
500 ppb
500 ppb
Herbicide runoff
Some people who drink water containing picloram
								  in excess of the MCL over many years could experience problems with their
								  liver.
Simazine
4 ppb
-
4 ppb
4 ppb
Herbicide runoff
Some people who drink water containing simazine
								  in excess of the MCL over many years could experience problems with their
								  blood.
Toxaphene
3 ppb
-
3 ppb
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
5 ppb
-
5 ppb
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
5 ppb
-
5 ppb
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 their liver and may have an increased risk of getting cancer.
Chlorobenzene
100 ppb
-
100 ppb
100 ppb
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
600 ppb
-
600 ppb
600 ppb
Discharge from industrial chemical factories
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.
p-Dichlorobenzene
75 ppb
-
75 ppb
75 ppb
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
5 ppb
-
5 ppb
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
7 ppb
-
7 ppb
7 ppb
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
70 ppb
-
70 ppb
70 ppb
Discharge from industrial chemical factories
Some people who drink water containing
								  cis-1,2-dichloroethylene in excess of the MCL over many years could experience
								  problems with their liver.
trans-1,2-Dichloroethylene
(()) 100 ppb
-
100 ppb
100 ppb
Discharge from industrial chemical factories
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.
Dichloromethane
5 ppb
-
5 ppb
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 increased risk of getting cancer.
1,2-Dichloropropane
5 ppb
-
5 ppb
0
Discharge from industrial chemical factories
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.
Ethylbenzene
700 ppb
-
700 ppb
700 ppb
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.
Styrene
100 ppb
-
100 ppb
100 ppb
Discharge from rubber and plastic factories;
								  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
5 ppb
-
5 ppb
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
70 ppb
-
70 ppb
70 ppb
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
200 ppb
-
200 ppb
200 ppb
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
5 ppb
-
5 ppb
3 ppb
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.
Toluene
1000 ppm
-
1000 ppm
1000 ppm
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
2 ppb
-
2 ppb
0
Leaching from PVC piping: Discharge 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
10,000 ppb
-
10,000 ppb
10,000 ppb
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.
Treatment Technique Violations
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 an increased risk of getting
								  cancer.
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.
Groundwater rule TT violations
TT
-
TT
N/A
-
Inadequately treated or inadequately protected
								  water may contain disease-causing organisms. These organisms can cause symptoms
								  such as diarrhea, nausea, cramps, and associated headaches.
Key
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 (ug/L)
ppt
= parts per trillion, or
								  nanograms per liter (ng/L)
ppq
= parts per quadrillion, or
								  picograms per liter (pg/L)
SAL
= state action level
TT
= Treatment Technique
Reviser's note:
The brackets and enclosed
						  material in the text of the above section occurred in the copy filed by the
						  agency and appear in the Register pursuant to the requirements of
						  RCW
						  34.08.040.
Statutory Authority:
						  RCW
						  43.20.050 and
						  70.119A.080. 10-20-068, §
						  246-290-72012, filed 9/29/10, effective 11/1/10. Statutory Authority:
						  RCW
						  70.119A.180 and
						  43.20.050. 08-03-061, §
						  246-290-72012, filed 1/14/08, effective 2/14/08. Statutory Authority:
						  RCW
						  43.20.050 and
						  70.119A.080. 04-04-056, §
						  246-290-72012, filed 1/30/04, effective 3/1/04. Statutory Authority:
						  RCW
						  43.20.050(2) and (3) and
						  70.119A.080. 03-08-037, §
						  246-290-72012, filed 3/27/03, effective 4/27/03. Statutory Authority:
						  RCW
						  43.20.050. 00-15-080, § 246-290-72012,
						  filed 7/19/00, effective 8/19/00.
Reviser's note:
The brackets and enclosed
						  material in the text of the above section occurred in the copy filed by the
						  agency.