Details for 2021 Selbyville Water Report

2021 Water Quality Report
SELBYVILLE WATER DEPARTMENT
6 Railroad Avenue, Selbyville, DE 19975
PWS ID# DE0000654
June 23, 2021
We are pleased to present this year's Annual
Water Quality Report (Consumer Confidence
Report) as required by the Safe Drinking Water
Act (SDWA). This report is designed to provide
details about where your water comes from, what
it contains, and how it compares to standards set
by regulatory agencies. This report is a snapshot
of last year's water quality. We are committed to
providing you with this information because
informed customers are our best allies.
Spanish (Espanol): Este informe contiene
informacion muy importante sobre la calidad de
su agua beber. Traduscalo o hable con alguien
que lo entienda bien.
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 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. EPA/
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 Water Drinking
Hotline (800-426-4791).
Where does my water come from?
Your water is groundwater that comes from the
Columbia Group Aquifer.
Source water assessment and availability
Our source water assessment is available
through: http://delawaresourcewater.org/assessments/
The Source Water Assessment’s Summary of
Our System’s Susceptibility to Contamination
Overall, Selbyville Water Department is exceedingly susceptible to petroleum hydrocarbons and
metals based on analytical data. It has a very high
susceptibility to nutrients and a high susceptibility
to pathogens, pesticides, PCBs, other organic
compounds and other inorganic compounds.
Why are there contaminants in my 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
water poses a health risk. More information about
contaminants and potential health effects can be
obtained by calling the Environmental Protection
Agency's (EPA) Safe Drinking Water Hotline,
800-426-4791.

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. In order to ensure
that tap water is safe to drink, EPA prescribes
regulations that limit the amount of certain
contaminants in water provided by public water
systems. Food and Drug Administration regulations establish limits for contaminants in bottled
water which must provide the same protection for
public health.
Contaminants that may be present in source water
include:
• 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 naturally occurring 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 byproducts 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.
How can I get involved?
If you have any questions about this report or your
water utility, please contact Stacey Long at
302-436-8314 ext. 103. We want our customers
to be informed about their water utility.
Additional information about lead
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.
Selbyville Water Department 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

tion. As such, some of our data, though representative, may be more than
one year old. In this table you will find terms and abbreviations that might

not be familiar to you. To help you better understand these terms, we have
provided the definitions in the tables below.

Important Drinking Water Definitions
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
Violations:
MCL, Average – Water samples showed that the
amount of the contaminant Total Trihalomethanes
(TTHM) in our drinking water was above its
standard (called a maximum contaminant level
and abbreviated MCL) for the period indicated
(1/1/2020-3/31/2020.
MCL, Average – Water samples showed that the
amount of the contaminant in our drinking water
was above its standard (called a maximum
contaminant level and abbreviated MCL) for the
period indicated (7/1/2020-9/30/2020).
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.
Corrective action was taken by installing an
automatic flushing device at the historical water
site.
For more information, contact:
Stacey Long
P.O. Box 106
Selbyville, DE 19975
(302) 436-8314
Water Quality Data Tables
In order to ensure that tap water is safe to drink,
EPA prescribes regulations which limit the amount
of contaminants in water provided by public water
systems. The table below lists all of the drinking
water contaminants that we detected during the
calendar year of this report. Although many more
contaminants were tested, only those substances
listed below were found in your water. All sources
of drinking water contain some naturally occurring
contaminants. At low levels, these substances are
generally not harmful in our drinking water.
Removing all contaminants would be extremely
expensive, and in most cases, would not provide
increased protection of public health. A few
naturally occurring minerals may actually improve
the taste of drinking water and have nutritional
value at low levels. Unless otherwise noted, the
data presented in this table is from testing done in
the calendar year of the report. The EPA or the
State requires us to monitor for certain contaminants less than once per year because the
concentrations of these contaminants do not vary
significantly from year to year, or the system is not
considered vulnerable to this type of contamina-

MCLG: Maximum Contaminant Level Goal: 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: 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.
SMCL: Suggested Maximum Contaminant Level for aesthetic contaminants.
TT: Treatment Technique: A required process intended to reduce the level
of a contaminant in drinking water.

Definitions

AL: Action Level: The concentration of a contaminant which, if exceeded,
triggers treatment or other requirements which a water system must follow.
MRDLG: Maximum residual disinfection 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.
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 control of microbial contaminants.

Delaware Secondary Drinking Water Standards

Unit Descriptions
Term
Definition
ppm
parts per million, or milligrams per liter (mg/L)
ppb
parts per billion, or micrograms per liter (ug/L)
NA
not applicable
ND
not detected
NR
Monitoring not required, but recommended

Contaminants
Alkalinity

Units
ppm

State SMCL
n/a

Average
99.6

Chloride

ppm

250

29.44

Sodium

ppm

n/a

56.9671

Sulfate

ppm

250

21.99

Range
99.6
23.618150.4546
56.9671
1.500531.7762

Table of Regulated Contaminants Utilizing 2020 Test Results
Lead and
Copper

Units

MCLG

AL

Lead

ppb

0

15

Copper

ppm

Regulated
Units
Contaminants

90th
#Sites over Sample
Percent
AL
Date
ile

2.5

0

2020

Violation

Typical Source of Contamination

No

Corrosion of household plumbing;
erosion of natural deposits

1.3

1.3

0.038

0

2020

No

Erosion of natural deposits;
leaching from wood preservatives;
corrosion of household plumbing
system.

MCLG

MCL

Highest
Level

Range

Sample
Date

Violation

Typical Source of Contamination

By-product of drinking water
chlorination

Haloacetic
acids (HAA5)

ppb

n/a

60

25

5.02349.116

2020

No

Total Trihalomethanes

ppb

n/a

80

72

42.3-93.69

2020

Yes

Chlorine

ppm

1.48

0.48-1.48

2020

No

Fluoride

ppm

MRDLG 4 MRDL 4

2

2

1.1

0-1.1429

We, at Selbyville Water Department, 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.

2020

No

By-product of drinking water
disinfection
Water additive to control microbes
Erosion of natural deposits; water
additive which promotes strong
teeth; discharge from fertilizer and
aluminum factories

This CCR Report was prepared in collaboration with Delaware Rural Water
Association and Selbyville Water Department.
CP 20210702 1T

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