Public Utilities

Posted on: January 31, 2017

2016 Water Quality Report

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We are pleased to present to you this year's Annual Drinking Water Quality Report.  This report is a snapshot of last year’s water quality.  Included are details about your source of water, what it contains, and how it compares to standards set by regulatory agencies.  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 and to providing you with this information because informed customers are our best allies.  If you have any questions about this report or concerning your water, please contact Dena Reid at 336-627-1009 ext. 131.  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.  Meetings of the City Council are held on the third Tuesday of every month at 6:00 p.m.

 

What EPA Wants You to Know

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).

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/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 (800-426-4791).

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. The City of Eden Water Filtration Plant 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

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, 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 by-products of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, and septic systems; and 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 prescribes 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.

  

When You Turn on Your Tap, Consider the Source

The water that we provide to our customers comes from the Dan River. It is our sole source of water.  The Dan River originates in Virginia and flows through Eden and on to Kerr Reservoir on the Roanoke River.  Our water treatment plant, the Robert A. Harris Water Filtration Plant, is located on the banks of the Dan River in Eden.  Demand for good, clean water is high and our filtration plant produces roughly 5 million gallons of clean drinking water every day. Our water supply is part of the Upper Dan River Watershed that covers an area of roughly 2,075 square miles around Eden. Most of our watershed is covered by forested lands (98%) or is used for growing crops.

Source Water Assessment Program (SWAP) Results


The complete SWAP Assessment report for The City of Eden may be viewed on the Web at:  http://www.ncwater.org/files/swap/SWAP_Reports/0279010_7_13_2015_17_22.pdf

Note that because SWAP results and reports are periodically updated by the PWS Section, the results available on this web site may differ from the results that were available at the time this CCR was prepared.  If you are unable to access your SWAP report on the web, you may mail a written request for a printed copy to:  Source Water Assessment Program – Report Request, 1634 Mail Service Center, Raleigh, NC 27699-1634, or email requests to swap@ncdenr.gov.  Please indicate your system name (City of Eden), number (02-79-010), and provide your name, mailing address and phone number.  If you have any questions about the SWAP report please contact the Source Water Assessment staff by phone at 919-707-9098. It is important to understand that a susceptibility rating of “higher” does not imply poor water quality, only the system’s potential to become contaminated by PCSs in the assessment area.

The North Carolina Department of Environment and Natural Resources (DENR), Public Water Supply (PWS) Section, Source Water Assessment Program (SWAP) conducted assessments for all drinking water sources across North Carolina.  The purpose of the assessments was to determine the susceptibility of each drinking water source (well or surface water intake) to Potential Contaminant Sources (PCSs).  The results of the assessment are available in SWAP Assessment Reports that include maps, background information and a relative susceptibility rating of Higher, Moderate or Lower.

The relative susceptibility rating of each source for The City of Eden was determined by combining the contaminant rating (number and location of PCSs within the assessment area) and the inherent vulnerability rating (i.e., characteristics or existing conditions of the well or watershed and its delineated assessment area). The assessment findings are summarized in the table below:

 

Susceptibility of Sources to Potential Contaminant Sources (PCSs)                           

Source Name

Susceptibility Rating

SWAP Report Date

Dan River

Higher

July 13, 2015

Help Protect Your Source Water

Protection of drinking water is everyone’s responsibility.  The City of Eden has implemented Zoning, Water Supply and Watershed Ordinances to control the development density to help protect our water source. You can help protect your community’s drinking water source in several ways: (examples:  dispose of chemicals properly; take used motor oil to a recycling center, volunteer in your community to participate in group efforts to protect your source, etc.).

 

  Water Quality Data Tables of Detected Contaminants

We routinely monitor for over 150 contaminants in your drinking water according to Federal and State laws. The following tables list all the drinking water contaminants that we detected in the last round of sampling for each particular contaminant group.  The presence of contaminants does not necessarily indicate that water poses a health risk.  Unless otherwise noted, the data presented in this table is from testing done January 1 through December 31, 2016.  The EPA and the State allow us to monitor for certain contaminants less than once per year because the concentrations of these contaminants are not expected to vary significantly from year to year.  Some of the data, though representative of the water quality, is more than one year old.


Important Drinking Water Definitions:    

Not-Applicable (N/A– Information not applicable/not required for that particular water system or for that particular rule.

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.

Picocuries per liter (pCi/L) - Picocuries per liter is a measure of the radioactivity in water.

Million Fibers per Liter (MFL) - Million fibers per liter is a measure of the presence of asbestos fibers that are longer than 10 micrometers.

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. 

Treatment Technique (TT) - A required process intended to reduce the level of a contaminant in drinking water.

Maximum Residual Disinfection 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 Disinfection 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.

Locational Running Annual Average (LRAA) – The average of sample analytical results for samples taken at a particular monitoring location during the previous four calendar quarters under the Stage 2 Disinfectants and Disinfection Byproducts Rule.

Maximum Contaminant Level (MCL) - 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 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.

 

Tables of Detected Contaminants

 

Microbiological Contaminants in the Distribution System 

Contaminant (units)
MCL Violation
Y/N
Your Water
MCLG
MCL
Likely Source of Contamination
Total Coliform Bacteria
(presence or absence)

No

   0
0
One positive monthly sample
Naturally present in the environment
Fecal Coliform or E. coli
(presence or absence)

No

   0
0
one positive monthly sample
Naturally present in the environment

 

 Turbidity* 

Contaminant (units)

Treatment Technique (TT) Violation Y?N

Your Water
MCLG
Treatment Technique (TT) Violation if:
Likely Source of Contamination

Turbidity (NTU)  -  Highest single turbidity measurement

N

  0.18 NTU

N/A

Turbidity  > 1  NTU
Soil runoff
Turbidity (NTU)  -  Lowest monthly percentage (%) of samples meeting turbidity limits

N

100%

N/A

Less than 95% of monthly turbidity measurements are 0.3 NTU

Soil runoff

 Turbidity is a measure of the cloudiness of the water. We monitor it because it is a good indicator of the effectiveness of our filtration system. The turbidity rule requires that 95% or more of the monthly samples must be less than or equal to 0.3 NTU.

 

 Inorganic Contaminants  

Contaminant (units)

Sample Date

MCL Violation

Y/N

Your

Water

Range

Low        High

MCLG

MCL

Likely Source of Contamination

Fluoride (ppm)

3-2-16

N

.51

.04 - .76

4

4

Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories

 

Lead and Copper Contaminants

Contaminant (units)

Sample Date

Your

Water

Number of sites found above the AL

MCLG

AL

Likely Source of Contamination

Copper (ppm)
(90th percentile)

6-2014

.2

0

1.3

AL=1.3

Corrosion of household plumbing systems; erosion of natural deposits
Lead  (ppb)
(90th percentile)

6-2014

5.4

2

0

AL=15

Corrosion of household plumbing systems;  erosion of natural deposits

 

Radioactive Contaminants

Contaminant (units)
Sample Date
MCL Violation
Y/N
Your
Water
MCLG
MCL
Likely Source of Contamination
Alpha emitters (pCi/L)
Feb 2012
N
<3 pCi/L
0
15
Erosion of natural deposits
Beta/photon emitters (pCi/L)
Feb 2012
N
<4 pCi/L
0
50 *
Decay of natural and man-made deposits
Combined radium (pCi/L)
Feb 2012
N
0.72 pCi/L
0
5
Erosion of natural deposits
Uranium (pCi/L)
Feb 2012
N
<2 pCi/L
0
20.1
Erosion of natural deposits

* Note:The MCL for beta particles is 4 mrem/year. EPA considers 50 pCi/L to be the level of concern for beta particles.

 

Total Organic Carbon (TOC)

Contaminant (units)

TT Violation Y/N

Your Water

(RAA Removal Ratio)

Range Monthly Removal Ratio

Low - High

MCLG

TT

Likely Source of Contamination

Compliance Method

(Step 1 or ACC#__)

Total Organic Carbon (removal ratio)
(TOC)-TREATED

N

1.9

.71    –            2.86

N/A

TT

Naturally present in the environment
ACC 2

 

Disinfectant Residuals Summary


Year Sampled

MRDL Violation Y/N

Your Water (highest RAA)

Range       Low    High

MRDLG
MRDL
Likely Source of Contamination
Chlorine (ppm)
2016
        N
         1.22
.44     1.93

4

4

Water additive used to control microbes

 

 Stage 2 Disinfection Byproduct Compliance - Based upon Locational Running Annual Average (LRAA)

Disinfection Byproduct

Year Sampled

MCL  Violation

Your Water

Range

MCLG

MCL

Likely Source of Contamination



Y/N

(highest LRAA)

Low           High




TTHM  (ppb)





N/A

Byproduct of drinking water disinfection

  Location








B01

2016

NO

53

20            97

80


B02

2016

NO

54

21            94

80


B03

2016

NO

55

24         100

80


B04

2016

NO

53

21            95

80


HAA5  (ppb)





N/A

Byproduct of drinking water disinfection

  Location








B01

2016

NO

24

11            37

60


B02

2016

NO

24

11            38

60


B03

2016

NO

22

13            29

60


B04

2016

NO

23

12            38

60


For TTHM:  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.

The PWS Section requires monitoring for other misc. contaminants, some for which the EPA has set national secondary drinking water standards (SMCLs) because they may cause cosmetic effects or aesthetic effects (such as taste, odor, and/or color) in drinking water.  The contaminants with SMCLs normally do not have any health effects and normally do not affect the safety of your water.

 

Other Miscellaneous Water Characteristics Contaminants 

Contaminant (units)

Sample Date

Your

Water

Range

Low                 High    

SMCL

Sodium (ppm)

3/2/2016

8.6

NA

N/A

pH

3/2/2016

7.3

7.0                      7.4

6.5 to 8.5

 

 

Security and Conservation

Is My Water System Secure?  The Public Health Security and Bioterrorism Preparedness and Response Act of 2002 (Bioterrorism Act) required that the City of Eden as a Public Water Supply conduct a Vulnerability Assessment (VA) and prepare an Emergency Response Plan (ERP) update based on the findings of the assessment.  The VA and the ERP have been completed.  We are continuously making security and procedure improvements to protect the quality and the dependability of your water system.

The Governor has a new water conservation website to update and inform citizens as to what they can do to help in drought situations:  www.savewaternc.org/

 

Water Conversation measures are an important first step in protecting our precious water supply and save you money by reducing your water bill.  Here are some conservation tips:

 Fix leaking indoor faucets, pipes, toilets, etc.

Install water saving devices in toilets, showers and appliances

Wash only full loads of laundry

Take short showers

Do not let the water run while shaving or brushing teeth

Use water saving nozzles. Do not use the toilet for trash disposal  

Water the lawn and garden in the early morning or evening

Replace old fixtures

Use water in a bucket to wash your car and save the hose for rinsing

Use mulch around plants and shrubs

Repair leaks in outdoor faucets and hoses

Soak dishes before washing

Run the dishwasher only when full





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