Water System Name: |
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Report Date: |
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We test the drinking water quality for many constituents as required by
state and federal regulations. This
report shows the results of our monitoring for the period of January 1 -
December 31, 2010.
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Type of water source(s) in use: |
Surface Water, = State Water Project (Aqueduct). Ground Water, = Well |
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Name & location of
source(s): |
Surface Water = Willowsprings turnout, Munzs Ranch Road. |
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Ground Water = Brookwood Well. |
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An assessment of drinking water source (Brookwood Well) for the Water System was completed in Apil 2009 conducted by Lake Elizabeth Mutual Water Company and California Department of Public Health. |
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Time and place of
regularly scheduled board meetings for public participation: |
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For more information,
contact: |
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Phone: (661) 724-1806 | ||||||
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TERMS USED
IN THIS REPORT |
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Maximum Contaminant Level (MCL): The highest level of a contaminant that
is allowed in drinking water. Primary
MCLs are set as close to the PHGs (or MCLGs) as is economically and
technologically feasible. Secondary
MCLs are set to protect the odor, taste, and appearance of drinking water. Maximum Contaminant Level Goal (MCLG): The level of a
contaminant in drinking water below which there is no known or expected risk
to health. MCLGs are set by the U.S.
Environmental Protection Agency (USEPA). Public Health Goal (PHG): The level of a contaminant in drinking water
below which there is no known or expected risk to health. PHGs are set by the California
Environmental Protection Agency. Maximum Residual
Disinfectant Level (MRDL): The
highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition
of a disinfectant is necessary for control of microbial contaminants. Maximum Residual
Disinfectant Level Goal (MRDLG): The level of a drinking
water disinfectant below which there is no known or expected risk to
health. MRDLGs do not reflect the
benefits of the use of disinfectants to control microbial contaminants. |
Primary Drinking Water Standards (PDWS): MCLs and MRDLs for
contaminants that affect health along with their monitoring and reporting
requirements, and water treatment requirements. Secondary Drinking Water Standards (SDWS): MCLs for contaminants
that affect taste, odor, or appearance of the drinking water. Contaminants with SDWSs do not affect the
health at the MCL levels. Treatment Technique (TT): A required process intended to reduce the
level of a contaminant in drinking water. Regulatory Action Level (AL): The concentration of a contaminant which, if
exceeded, triggers treatment or other requirements that a water system must
follow. Variances and Exemptions: Department permission to exceed an MCL or
not comply with a treatment technique under certain conditions. ND:
not detectable at testing limit 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 picogram per liter (pg/L) pCi/L: picocuries per liter (a measure of radiation) |
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The sources of drinking
water (both
tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs,
springs, and wells. As water travels
over the surface of the land or through the ground, it dissolves
naturally-occurring minerals and, in some cases, radioactive material, and can
pick up substances resulting from the presence of animals or from human
activity.
Contaminants that may be present in
source water include:
·
Microbial contaminants, such as viruses and bacteria, that may come from
sewage treatment plants, septic systems, agricultural livestock operations, and
wildlife.
·
Inorganic contaminants, such as salts and metals, that can be
naturally-occurring or result from urban stormwater runoff, industrial or
domestic wastewater discharges, oil and gas production, mining, or farming.
·
Pesticides and herbicides, that may come from a variety of sources such as
agriculture, urban stormwater runoff, and residential uses.
·
Organic chemical contaminants, including synthetic and volatile organic chemicals,
that are by-products of industrial processes and petroleum production, and can
also come from gas stations, urban stormwater runoff, agricultural application,
and septic systems.
·
Radioactive contaminants, that can be naturally-occurring or be the result of
oil and gas production and mining activities.
In order to ensure that tap water is safe to drink, the USEPA and the state Department of Public Health
(Department) prescribe regulations that limit the amount of certain
contaminants in water provided by public water systems. Department regulations also establish limits
for contaminants in bottled water that provide the same protection for public
health.
Tables 1, 2,
3, 4, and 5 list all of the drinking water contaminants that were detected
during the most recent sampling for the constituent. The presence
of these contaminants in the water does not necessarily indicate that the water
poses a health risk. The Department
allows us to monitor for certain contaminants less than once per year because
the concentrations of these contaminants do not change frequently. Some of the data, though representative of
the water quality, are more than one year old.
Table 1 – sampling results showing the detection of coliform bacteria |
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Microbiological Contaminants (complete if bacteria detected) |
Highest No. of Detections |
No. of months in violation |
MCL |
MCLG |
Typical Source of Bacteria |
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Total Coliform Bacteria |
(In a mo.)
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More than 1 sample in a month with a detection |
0 |
Naturally present in the environment |
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Fecal Coliform or E. coli |
(In the year)
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"0"
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A routine sample and a repeat sample detect total coliform and either sample also detects fecal coliform or E. coli |
0 |
Human and animal fecal waste |
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Table 2 – sampling results showing the detection of Lead and copper |
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Lead and Copper (complete if lead or copper detected in the last sample set) 7/2009 Tri-Annual |
No. of samples collected |
90th percentile level detected |
No. sites exceeding AL |
AL |
PHG |
Typical Source of Contaminant |
Health Effects Language |
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Lead (ppb) 7/2009 Tri-Annual |
10
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15 |
0.2 ppb |
Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits |
If present, elevated levels of lead can cause serious health problems, especially for pregnat women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. Lake Elizabeth Mutual Water Company is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using for drinking or cooking. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Sate Drinkong Water Hotline or at http://www.epa.gov/safewater/lead.
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Copper (ppb) 7/2009 Tri-Annual |
10
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1.3 |
300 ppb |
Internal corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives |
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 may experience gastrointestinal distress. Some people who drink water containing copper in excess of the action level over many years may suffer liver or kidney damage. People with Wilson’s Disease should consult their personal doctor. |
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TAble 3 – sampling results for sodium and hardness |
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Chemical or Constituent (and reporting units) |
Sample Date |
Surface Water, Level Detected |
Brookwood Well, |
Typical Source of Contaminant |
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Sodium (Na) (ppm) |
10/14/10
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72 mg/L |
35 mg/L
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none |
Salt present in the water and is generally naturally occurring |
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Hardness (ppm) |
10/14/10
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108 mg/L |
253 mg/L
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none |
Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually naturally occurring |
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INORGANIC ---SURFACE WATER
TAble 4 – detection of
contaminants with a Primary Drinking Water Standard |
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Chemical or
Constituent |
Sample Date |
Surface Water, Level
Detected |
Brookwood Well, |
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Typical
Source of Contaminant |
Health Effects Language |
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10/14/10 |
20 ug/L |
ND |
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1000ug/L |
600 ppb
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Some people who drink water containing aluminum in excess of the MCL over many years may experience short-term gastrointestinal tract effects. |
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2 ug/L |
ND |
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10 ug/L |
0.004 ppb |
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Some people who drink water containing arsenic in excess of the MCL over many years may experience skin damage or circulatory system problems, and may have an increased risk of getting cancer. |
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10/14/10 |
35.5 ug/L |
68.7 ug/L |
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1000 ug/L |
2,000 ppb |
Discharge of oil drilling wastes and from metal refineries; erosion of natural deposits |
Some people who drink water containing barium in excess of the MCL over many years may experience an increase in blood pressure. |
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10/14/10 |
ND |
ND |
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50 ug/L |
withdrawn |
Discharge from steel and pulp mills and chrome plating; erosion of natural deposits |
Some people who use water containing chromium in excess of the MCL over many years may experience allergic dermatitis. |
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FLUORIDE |
10/14/10 |
ND |
0.5 mg/L |
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2 mg/L |
1,000 ppb |
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Some people who drink water containing fluoride in excess of the federal MCL of 4 mg/L over many years may get bone disease, including pain and tenderness of the bones. Children who drink water containing fluoride in excess of the state MCL of 2 mg/L may get mottled teeth. |
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10/14/10 |
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0.8 ug/L |
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AL = 15 |
0.2 ppb |
Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits
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Infants and children who drink water containing lead in excess of the action level may experience delays in their physical or mental development. Children may show slight deficits in attention span and learning abilities. Adults who drink this water over many years may develop kidney problems or high blood pressure. |
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10/14/10 |
2 ug/L |
1 ug/L |
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100 ug/L |
12 ppb |
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Some people who drink water containing nickel in excess of the MCL over many years may experience liver and heart effects. |
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10/14/10 |
2.2 mg/L |
15.4 mg/L |
6.0 mg/L |
45 mg/L |
10,000 as N ppb |
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 may quickly become seriously ill and, if untreated, may die because high nitrate levels can interfere with the capacity of the infant’s blood to carry oxygen. Symptoms include shortness of breath and blueness of the skin. High nitrate levels may also affect the oxygen-carrying ability of the blood of pregnant women. |
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10/14/10 |
ND |
ND |
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6 ug/L |
6 ppb |
Perchlorate is an inorganic chemical used in solid rocket propellant, fireworks, explosives, flares, matches, and a variety of industries. It usually gets into drinking water as a result of environmental contamination from historic aerospace or other industrial operations that used or use, store, or dispose of perchlorate and its salts. |
Perchlorate has been shown to interfere with uptake of iodide by the thyroid gland, and to thereby reduce the production of thyroid hormones, leading to adverse affects associated with inadequate hormone levels. Thyroid hormones are needed for normal prenatal growth and development of the fetus, as well as for normal growth and development in the infant and child. In adults, thyroid hormones are needed for normal metabolism and mental function. |
TAble 5 – detection of CONTAMINANTS With a secondary drinking water standard |
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Chemical or
Constituent |
Sample Date |
Surface Water, Level
Detected |
Brookwood Well, |
#2 Well, |
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Typical
Source of Contaminant |
Health Effects Language |
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10/14/10 |
115 mg/L |
48 mg/L |
21 mg/L |
500 mg/L |
Runoff/leaching from natural deposits; seawater influence. |
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10/14/10 |
340ug/L |
60 ug/L |
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300+ug/L |
Leaching of natural deposits, industrial discharge. |
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10/14/10 |
20ug/L |
ND |
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50+ug/L
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Erosion of natural deposits |
The notification level for manganese is used to protect consumers from neurological effects. High levels of manganese in people have been shown to result in effects of the nervous system. |
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10/14/10 |
28 mg/L |
64 mg/L |
8
39 mg/L |
500 mg/L |
Runoff / Corrosion of natural deposits, inustrial wastes |
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Table 6 – RADIO CHEMICALS ANALYSIS (RADIOLOGICAL) |
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Chemical or
Constituent |
Sample Date |
Surface Water, Level
Detected |
Brookwood Well, |
#2 Well, |
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Typical
Source of Contaminant |
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10/22/2009 |
5.14 pCi/L |
2.69 pCi/L |
2.85 pCi/L |
15 pCi/L |
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10/22/2009 |
ND |
1.69 pCi/L |
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50 pCi/L |
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10/22/2009 |
2.32 pCi/L |
1.80 pCi/L |
2.28 pCi/L |
20 pCi/L |
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10/22/2009 |
0.289 pCi/L |
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2 pCi/L |
Erosion of natual deposits |
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10/22/2009 |
120 pCi/L |
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20000 pCi/L |
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*Any violation
of an MCL, MRDL, or TT is asterisked.
Additional information regarding the violation is provided later in this
report.
Additional General Information on
Drinking Water
Drinking water, including bottled water, may
reasonably be expected to contain at least small amounts of some
contaminants. The presence of
contaminants does not necessarily indicate that the water poses a health risk.
More information about contaminants and potential health effects can be
obtained by calling the USEPA’s Safe Drinking Water Hotline (1-800-426-4791).
Some people may be
more vulnerable to contaminants in drinking water than the general
population. Immuno-compromised persons such
as persons with cancer undergoing chemotherapy, persons who have undergone
organ transplants, people with HIV/AIDS or other immune system disorders, some
elderly, and infants can be particularly at risk from infections. These people
should seek advice about drinking water from their health care providers.
USEPA/Centers for Disease Control (CDC) guidelines on appropriate means to
lessen the risk of infection by Cryptosporidium
and other microbial contaminants are available from the Safe Drinking Water Hotline
(1-800-426-4791).
Summary Information for Contaminants Exceeding an MCL, MRDL,
or AL or
Violation of Any TT or Monitoring and Reporting Requirement
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Monitoring Requirements Not Met for; 1910056 - Lake Elizabeth Mutual Water Company
Our water system failed to monitor as required for drinking water standards during the past year and, therefore, was in violation of the regulations. Even though this failure was not an emergency, as our customers, you have a right to know what you should do, what happened, and what we did to correct this situation. |
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Monitoring Requirements Not Met for; 1910056 - Lake Elizabeth Mutual Water Company
What should I do?
• “We have since taken the required samples, as described in the last column of the table above. The samples showed we are meeting drinking water standards.” |
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For Systems Providing Ground Water as a
Source of Drinking Water
(Refer to page 1, “Type
of water source in use” to see if your source of water is surface water or
groundwater)
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TAble 7 – Sampling Results
Showing feCal indicator-positive |
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Microbiological
Contaminants (complete if fecal-indicator detected) |
Total No. of Detections |
Sample |
MCL |
PHG |
Typical
Source of Contaminant |
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E. coli |
(In the year) |
Monthly |
0 |
(0) |
Human
and animal fecal waste |
Summary Information for Fecal Indicator-Positive
Table 8 - sampling results showing TREATMENT OF SURFACE WATER SOURCES |
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Treatment Technique (a) (Type of approved filtration technology used) |
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Turbidity Performance Standards (b) (that must be met through the water treatment process) |
Turbidity of the filtered water must: 1 – Be less than or equal to 0.3 NTU in 95% of measurements in a month. 2 – Not exceed 1.0 NTU for more than eight consecutive hours. 3 – Not exceed 5.0 NTU at any time. |
Lowest monthly percentage of samples that met Turbidity Performance Standard No. 1. |
100%
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Highest single turbidity measurement during the year |
0.48 NTU
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Number of violations of any surface water treatment requirements |
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Ground
Water Source Samples, Uncorrected Significant Deficiencies, or Violation of a
Ground Water TT
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For Systems Providing Surface Water as a
Source of Drinking Water
(Refer to page 1, “Type
of water source in use” to see if your source of water is surface water or
groundwater)
(a) A required process intended to reduce the
level of a contaminant in drinking water.
(b) Turbidity
(measured in NTU) is a measurement of the cloudiness of water and is a good
indicator of water quality and filtration performance. Turbidity results which meet performance
standards are considered to be in compliance with filtration requirements.
* Any violation of a
TT is marked with an asterisk.
Additional information regarding the violation is provided earlier in
this report.
DISINFECTION RESIDUAL, PRECURSORS, and BYPRODUCTS
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Type of Sample(s) |
Parameter |
Units |
MCL/MRDL |
DLR |
MRDLG |
RESULTS |
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Distribution |
Chlorine (as total Cl2) |
mg/L |
4.0** |
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4.0 |
0.43 - 0.98 mg/L / 0.79mg/L |
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Treated Water |
Total Organic Carbon (TOC) |
mg/L |
Treatment Requirement |
0.3 |
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0.59- 2.36mg/L / 1.5mg/L |
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Source Water |
Total Organic Carbon (TOC) |
mg/L |
Treatment Requirement |
0.3 |
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0.79-3.77 mg/L / 2.7 mg/L |
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Distribution |
Total Trihalomethanes |
ug/L |
80** |
0.5 |
none |
7.7 - 55.3 / 25.9# |
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Distribution |
Total Haloacetic Acids (5) |
ug/L |
60** |
2 |
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4.0 - 17 / 8.8# |
Summary Information for Violation of a Surface Water TT
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NONE
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