Details for 2021 Mallory Valley Utility District Water Quality Report

2021
Mallory Valley Utility District Water Quality Report
Is my drinking water safe?
Yes, your water is safe and our water meets all of the Environmental Protection
Agency’s (EPA) health standards. Our water provider has conducted tests for
more than 57 contaminants that may be present in drinking water. The State and
the EPA require us to test our water and report our findings on a regular basis.
We are pleased to report that our water passed all required tests. As you’ll see
in the chart on the back, only 11 contaminants were detected, and of those 11 all
were at safe levels. In addition, results of unregulated contaminant analysis are
available upon request.
Where does your water come from?
Your water, which is surface water, comes from Harpeth Valley Utility District,
which pumps water from the Cumberland River. Our goal is to protect our water
from contaminants and we are working with the State to determine the
vulnerability of our water source to potential contamination. The Tennessee
Department of Environment and Conservation (TDEC) has prepared a Source
Water Assessment Program (SWAP) Report for the untreated water sources
serving this water system. The SWAP Report assesses the susceptibility of
untreated water sources to potential contamination. To ensure safe drinking
water, all public water systems treat and routinely test their water. Water sources
have been rated as reasonably susceptible, moderately susceptible or slightly
susceptible based on geologic factors and human activities in the vicinity of the
water source. The Mallory Valley Utility District sources are rated as reasonably
susceptible to potential contamination.
An explanation of Tennessee’s Source Water Assessment Program, the Source
Water Assessment summaries, susceptibility scorings and the overall TDEC
report to EPA can be viewed online at https://www.tn.gov/environment/programareas/wr-water-resources/water-quality/source-water-assessment.html or you
may contact TDEC at 1-888-891-8332 to obtain copies of specific assessments.
Why are there contaminants in my 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 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 (800-426-4791).
Este informe contiene información muy importante. Tradúscalo o hable con
alguien que lo entienda bien.
For more information about your drinking water, please call Brian Worley
(615)628-0237.
How can I get involved?
The District’s Board of Commissioners and Management Team meet on the last
Friday of each month at 12:00 p.m. at the District office, which is located at 465
Duke Drive. Board meetings are open to the public. In order to be heard by the
Board, placement on the agenda for the meeting is requested.
The Commissioners of Mallory Valley Utility District serve four year terms.
Vacancies on the Board of Commissioners are filled by appointment by the
Mayor from a list of three nominees certified by the Board. Decisions by the
Board of Commissioners on customer complaints, brought before the Board
under the District's customer complaint policy, may be reviewed by the Utility
Management Review Board of the Tennessee Department of Environment and
Conservation pursuant to Section 7-82-702(7) of Tennessee Code Annotated.

Other information
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 also pick up
substances resulting from the presence of animals or from human activity.
Contaminants that may be present in source water:
· Microbial contaminants, such as viruses and bacteria, which may come
from sewage treatment plants, septic systems, agricultural livestock
operations, and wildlife.
· Inorganic contaminants, such as salts and metals, which can be naturallyoccurring or result from urban stormwater runoff, industrial, or domestic
wastewater discharges, oil and gas production, mining, or farming.
· Pesticides and herbicides, which 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, which are by-products of industrial processes and petroleum
production, and can also come from gas stations, urban stormwater runoff,
and septic systems.
· Radioactive contaminants, which 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, EPA and TDEC prescribe
regulations which limit the amount of certain contaminants in water provided by
public water systems. FDA regulations establish limits for contaminants in bottled
water which must provide the same protection for public health.
Important health information. Do I need to take special precautions?
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 under-gone organ transplants,
people with HIV/AIDS or other immune system disorders, some elderly, and
infants can be particularly at risk for infections. These people should seek advice
about not only their drinking water, but for food preparation, personal hygiene,
and also precautions in handling infants and pets from their health care providers.
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).
Lead in drinking water
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.
Mallory Valley Utility District 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. However, the District is
required to test for lead every 3 years. If you would like to participate in this free
service, please call our office. 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.
Water system security
Following the events of September 2001, we realize that our customers are
concerned about the security of their drinking water. We urge the public to report
any suspicious activities at any utility facilities, including treatment plants,
pumping stations, tanks, fire hydrants, etc. to (615)628-0237.

Water Quality Data
What does this chart mean?
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MCLG - Maximum Contaminant Level Goal, or 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.
MCL - Maximum Contaminant Level, or 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.
MRDL- Maximum Residual Disinfectant Level: The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for the control of microbial
contaminants.
MRDLG - Maximum Residual Disinfectant Level Goal. 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.
AL - Action Level, or the concentration of a contaminant which, when exceeded, triggers treatment or other requirements which a water system must follow.
BDL- Below Detection Level laboratory analysis indicates that the contaminant is not present at a level which can be detected.
PPM - Parts Per Million or Milligrams Per Liter– explained as a relation to time and money as one part per million corresponds to one minute in two years or a single penny in $10,000.
PPB - Parts Per Billion or Micrograms Per Liter - explained as a relation to time and money as one part per billion corresponds to one minute in 2,000 years, or a single penny in $10,000,000.
NTU - Nephelometric Turbidity Unit - nephelometric turbidity unit is a measure of the clarity of water. Turbidity in excess of 5 NTU is just noticeable to the average person.
RTCR – Revised Total Coliform Rule. This rule went into effect April 1, 2016 and replaces the MCL for total coliform with a Treatment Technique Trigger for a system assessment.
TT - Treatment Technique, or a required process intended to reduce the level of a contaminant in drinking water.
AVG – Average.

Violation
Yes/No

Level
Detected

Total Coliform Bacteria
(RTCR)

No

0.56%

Turbidity4

No

0.05 AVG

Copper1

No

90th%=0.23

Fluoride

No

0.58 AVG

Lead1

No

Sodium

Contaminant

Range of
Detections

Date of
Sample

Unit
Measurement

MCLG

MCL

Likely Source of Contamination

0

TT
Trigger

Naturally present in the environment

NTU

N/A

TT

Soil runoff

2020

PPM

1.3

AL=1.3

Corrosion of household plumbing systems; erosion of
natural deposits; leaching from wood preservatives

2020

PPM

4.0

4.0

Erosion of natural deposits; water additive which
promotes strong teeth

90th%=0.00042

2020

PPB

0

AL=15

Corrosion of household plumbing systems, erosion of
natural deposits

No

11.7

9/9/2020

PPM

N/A

N/A

Erosion of natural deposits; used in water treatment

Nitrate

No

0.37

10/7/2020

PPM

10.0

10.0

Soil runoff from fertilizer

TTHM
Total Trihalomethanes

No

36.93 AVG

25.90-57.60

PPB

N/A

80

By-product of drinking water disinfection

THAA
Total Haloacetic Acids

No

28.66 AVG

20.80-41.90

PPB

N/A

60

By-product of drinking water disinfection

Total Organic Carbon2

No

1.15 MAX

0.67-1.15

2020

PPM

N/A

TT

Naturally present in the environment

Violation
Yes/No

Level
Found

Range of
Detections

Date of
Sample

Unit
Measurement

MRDLG

MRDL

Likely Source of Contamination

No

2.0AVG

0.9-3.6

2020

PPM

4

4

Water additive used to control microbes

Violation
Yes/No

Level
Found

Range of
Detections

Unit
Measurement

MRDLG

MRDL

Likely Source of Contamination

Alkalinity

No

72 AVG

43-112

2020

PPM

N/A

N/A

The capacity of water to neutralize acids

Hardness3

No

90 AVG

74-114

2020

PPM

N/A

N/A

Erosion of natural deposits

Contaminant
Chlorine
Miscellaneous
Compounds

355
Samples
2020
0.03-0.82

0.40-0.69

2020

4 Quarterly
samples for
2020
4 Quarterly
samples for
2020

Date of
Sample

To understand the possible health side 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.

1 During

the most recent round of Lead and Copper testing, 0 out of 30 households sampled contained concentrations exceeding the action level.
have met all treatment technique requirements for Total Organic Carbon removal.
3 Equivalent to 5.4 grains per gallon of hardness.
4 Turbidity is a measure of the cloudiness of the water. It is monitored because it is a good indicator of the effectiveness of the filtration system.
2 We

This institution is an equal opportunity provider and employer.

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