DDW-2024-008487

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Water Quality Report -2023
Twin Oaks Local District

We are pleased to present to you this year's Annual Drinking Water Quality Report. This
report is designed to inform you about the quality of the water and services we deliver to you
every day. Our constant goal is to provide you with a safe and dependable supply of drinking
water. We want you to understand the efforts we make to continually improve the water
treatment process and protect our water resources. We are committed to ensuring the quality of
your water. Our water source has been determined to be from groundwater. Our water sources
are two wells and a consecutive connection to Whispering Pines Water System.

The Drinking Water Source Protection Plan for Twin Oaks Local District is available for
your review. It contains information about source protection zones, potential contamination
sources and management strategies to protect our drinking water. Our sources have been
determined to have a low level of susceptibility from potential contamination from sources such
as a country road. We have also developed management strategies to further protect our sources
from contamination. Please contact us if you have questions or concerns about our source
protection plan.

There are many connections to our water distribution system. When connections are properly
installed and maintained, the concerns are very minimal. However, unapproved and improper piping changes
or connections can adversely affect not only the availability, but also the quality of the water. A cross
connection may let polluted water or even chemicals mingle into the water supply system when not properly
protected. This not only compromises the water quality but can also affect your health. So, what can you do?
Do not make or allow improper connections at your homes. Even that unprotected garden hose lying in the
puddle next to the driveway is a cross connection. The unprotected lawn sprinkler system after you have
fertilized or sprayed is also a cross connection. When the cross connection is allowed to exist at your home,
it will affect you and your family first. If you’d like to learn more about helping to protect the quality of our
water, call us for further information about ways you can help.
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If you have any questions about this report or concerning your water utility, please contact
David Asay at 435-463-3555 ([e-mail]). We want our valued customers to be
informed about their water utility. If you want to learn more, please attend any of our regularly
scheduled meetings. They are held once a quarter, contact our office for dates and times.

Twin Oaks routinely monitors for constituents in our drinking water in accordance with
the Federal and Utah State laws. The following table shows the results of our monitoring for the
period of January 1st to December 31st, 2023. All drinking water, including bottled drinking
water, may be reasonably expected to contain at least small amounts of some constituents. It's
important to remember that the presence of these constituents does not necessarily pose a health
risk.
In the following table you will find many terms and abbreviations you might not be
familiar with. To help you better understand these terms we've provided the following
definitions:

Non-Detects (ND) - laboratory analysis indicates that the constituent is not present.
ND/Low - High - For water systems that have multiple sources of water, the Utah Division of Drinking
Water has given water systems the option of listing the test results of the constituents in one table, instead
of multiple tables. To accomplish this, the lowest and highest values detected in the multiple sources are
recorded in the same space in the report table.
Parts per million (ppm) or Milligrams per liter (mg/l) - one part per million corresponds to one minute in
two years or a single penny in $10,000.
Parts per billion (ppb) or Micrograms per liter (ug/l) - one part per billion corresponds to one minute in
2,000 years, or a single penny in $10,000,000.
Parts per trillion (ppt) or Nanograms per liter (nanograms/l) - one part per trillion corresponds to one
minute in 2,000,000 years, or a single penny in $10,000,000,000.
Picocuries per liter (pCi/L) - picocuries per liter is a measure of the radioactivity in water.
Millirems per year (mrem/yr) - measure of radiation absorbed by the body.
Nephelometric Turbidity Unit (NTU) - nephelometric turbidity unit is a measure of the clarity of water.
Turbidity in excess of 5 NTU is just noticeable to the average person.
Action Level (AL) - the concentration of a contaminant which, if exceeded, triggers treatment or other
requirements which a water system must follow.
Maximum Contaminant Level (MCL) - The “Maximum Allowed” (MCL) is the highest level of a
contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the
best available treatment technology.
Maximum Contaminant Level Goal (MCLG) - The “Goal”(MCLG) is the level of a contaminant in
drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of
safety.
Date- Because of required sampling time frames i.e. yearly, 3 years, 4 years and 6 years, sampling dates may seem
outdated
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TEST RESULTS
Contaminant Violation
Y/N
Level
Detected
ND/Low-
High
Unit
Measurement
MCLG MCL Date
Sampled
Likely Source of
Contamination
Total Coliform Bacteria N 1 N/A 0 Presence of
coliform bacteria
in 5% of monthly
samples
2023 Naturally present in the
environment
Fecal coliform and
E.coli
N ND N/A 0 If a routine
sample and
repeat sample are
total coliform
positive, and one
is also fecal
coliform or E.
coli positive
2023

Human and animal
fecal waste
Turbidity
for Ground Water
N 0.37 NTU N/A 5 2022 Soil runoff
Inorganic Contaminants
Arsenic N 0.5-1 Ppb 10 10 2022 Erosion of natural
deposits; runoff from
orchards; runoff from
glass and electronics
production wastes
Barium N 194-230 Ppb 2000 2000 2022 Discharge of drilling
wastes; discharge from
metal refineries; erosion
of natural deposits
Copper
a. 90% results
b. # of sites that
exceed the AL
N a. 38

b. 0
Ppm 1300 AL=1300 2021 Corrosion of household
plumbing systems; erosion of
natural deposits
Fluoride N 101-156 Ppb 4000 4000 2022 Erosion of natural deposits;
water additive which
promotes strong teeth;
discharge from fertilizer and
aluminum factories
Lead
a. 90% results
b. # of sites that exceed
the AL
N a. 2

b. 0
ppb 15 AL=15 2021 Corrosion of household
plumbing systems, erosion of
natural deposits
Nitrate (as Nitrogen) N 1 ppm 10 10 2023 Runoff from fertilizer use;
leaching from septic tanks,
sewage; erosion of natural
deposits
Selenium N 0.6-0.7 ppb 50 50 2022 Discharge from petroleum
and metal refineries; erosion
of natural deposits;
discharge from mines
Sodium N 3-7 ppm 500 None set by EPA 2022 Erosion of natural deposits;
discharge from refineries and
factories; runoff from
landfills.
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Sulfate N 10-15 ppm 1000 1000 2022 Erosion of natural deposits;
discharge from refineries and
factories; runoff from
landfills, runoff from
cropland
TDS (Total Dissolved
solids)
N 236-260 ppm 2000 2000 2022 Erosion of natural deposits
Radioactive Contaminants
Alpha emitters N 1-3 pCi/l 0 15 2021 Erosion of natural deposits
Combined N 0.69-0.93 pCi/l 0 5 2011 Erosion of natural deposits
Radium 226 N 0.05-0.52 pCi/1 0 5 2011 Erosion of natural deposits
Radium 228 N 0.08-1 pCi/1 0 5 2021 Erosion of natural deposits

Water samples taken in September 2023 confirmed the presence of total coliform bacteria. Total coliforms are
common in the environment and are generally not harmful themselves. The presence of these bacteria is usually a
result of a problem with water treatment or the pipes which distribute the water and indicates that the water may
have been contaminated with organisms that can cause disease. Symptoms may include diarrhea, cramps, nausea,
and possible jaundice, and any associated headaches and fatigue. When the monthly samples confirmed the presence
of total coliform bacteria, we took steps to identify and correct the problem. Subsequent monthly sampling has
confirmed the absence of total coliforms in the water system.

If present, elevated levels of lead can cause serious health problems, especially for pregnant
women and young children. Lead in drinking water is primarily from materials and components
associated with service lines and home plumbing. Twin Oaks 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 water 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 safe Drinking Water Hotline or at
http://www.epa.gov/safewater/lead.
All sources of drinking water are subject to potential contamination by constituents that are
naturally occurring, or manmade. Those constituents can be microbes, organic or inorganic
chemicals, or radioactive materials. All 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 Environmental
Protection Agency’s Safe Drinking Water Hotline at 1-800-426-4791.

MCLs are set at very stringent levels. To understand the possible health effects described for
many regulated constituents, a person would have to drink 2 liters of water every day at the MCL
level for a lifetime to have a one-in-a-million chance of having the described health effect.

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Some people may be more vulnerable to contaminants in drinking water than the general population.
Immunocompromised 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 from their health care
providers about drinking water. EPA/CDC guidelines on appropriate means to lessen the risk of infection by
cryptosporidium and other microbiological contaminants are available from the Safe Drinking Water Hotline
(800-426-4791).

We at Twin Oaks work around the clock to provide top quality water to every tap. We ask
that all our customers help us protect our water sources, which are the heart of our
community, our way of life and our children’s future.