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Home » Town Services » Public Works Department » Annual Drinking Water Quality Report

Annual Drinking Water Quality Report

2016” Annual Drinking Water Quality Report

                                                                                                                                               “Town of Ahoskie”

Water System Number:  “04-46-010”

 PDF Format/View

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(s) 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 Stephen Lassiter at (252)332-5146.  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 on the 2nd Tuesday of each month at 10am.

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 Town of Ahoskie 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

Our water source is from ground water.  The of Ahoskie uses seven(7) wells, ranging from 145 to 453 feet deep, drawing from the Upper Cape Fear and Black Creek aquifers.  These wells are located at the 800 of block of Odom St.(2 wells), the 1100 block of  N. Catherine St, and the 200 block of Talmage Ave.(2 wells), and Hwy 561 East(2 Wells).

 Source Water Assessment Program (SWAP) Results

 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 Ahoskie 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

Well # 1

Lower

March 2010

Well #3

Lower

March 2010

Well #3A

Moderate

March 2010

Well #4

Moderate

March 2010

Well #4A

Moderate

March 2010

Well #5A

Moderate

March 2010

Well #5B

Moderate

March 2010

 

The complete SWAP Assessment report for the Town of Ahoskie may be viewed on the Web at:  www.ncwater.org/pws/swap.  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, number, 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.

 Violations that Your Water System Received for the Report Year

 Zero! Our System did not receive any violations for 2016.

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 table below lists all the drinking water contaminants that we detected in the last round of sampling for the 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, 2015.  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.

Unregulated contaminants are those for which EPA has not established drinking water standards.  The purpose of unregulated contaminant monitoring is to assist EPA in determining the occurrence of unregulated contaminants in drinking water and whether future regulations are warranted.

Important Drinking Water Definitions:   

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

Non-Detects (ND) - Laboratory analysis indicates that the contaminant is not present at the level of detection set for the particular methodology used.

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.

Parts per quadrillion (ppq) or Picograms per liter (picograms/L) - One part per quadrillion corresponds to one minute in 2,000,000,000 years or one penny in $10,000,000,000,000.

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 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.

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 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 - For systems that collect less than 40samples per month)

 

Contaminant (units)

 

MCL Violation

Y/N

Your

Water

 

MCLG

 

MCL

Likely Source of Contamination

 

Total Coliform Bacteria

(presence or absence)

 

N

0

0

one positive monthly sample 

Naturally present in the environment

Fecal Coliform or E. coli

(presence or absence)

 

N

0

0

0   (Note:  The MCL is exceeded if a routine sample and repeat sample are total coliform positive, and one is also fecal coliform or E. coli positive)

Human and animal fecal waste

 

(A)  The potential health effects from the health effects language from Appendix A of Subpart O are as follows:  

E.coli - Fecal coliforms and E.coli are bacteria whose presence indicates that the water may be contaminated with human or animal wastes. Microbes in these wastes can cause short-term effects, such as diarrhea, cramps, nausea, headaches, or other symptoms. They may pose a special health risk for infants, young children, some of the elderly, and people with severely-compromised immune systems.

Fecal Indicators (enterococci or coliphage) - Fecal indicators are microbes whose presence indicates that the water may be contaminated with human or animal wastes. Microbes in these wastes can cause short-term health effects, such as diarrhea, cramps, nausea, headaches, or other symptoms. They may pose a special health risk for infants, young children, some of the elderly, and people with severely compromised immune systems

 

Inorganic Contaminants 

 

Contaminant (units)

 

Sample Date

MCL Violation

Y/N

Your

Water

Range

 

Low        High

MCLG

MCL

Likely Source of Contamination

Antimony (ppb)

10/24/16

N

0

 

6

6

Discharge from petroleum refineries; fire retardants; ceramics; electronics; solder

Arsenic (ppb)

10/24/16

N

 

0

 

0

10

Erosion of natural deposits; runoff from orchards; runoff from glass and electronics production wastes

Barium (ppm)

10/24/16

N

0

 

2

2

Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits

Beryllium (ppb)

10/24/16

N

0

 

4

4

Discharge from metal refineries and coal-burning factories; discharge from electrical, aerospace, and defense industries

Cadmium (ppb)

10/24/16

N

0

 

5

5

Corrosion of galvanized pipes; erosion of natural deposits; discharge from metal refineries; runoff from waste batteries and paints

Chromium (ppb)

10/24/16

N

0

 

100

100

Discharge from steel and pulp mills; erosion of natural deposits

Cyanide (ppb)

10/24/16

N

0

 

200

200

Discharge from steel/metal factories; discharge from plastic and fertilizer factories

Fluoride (ppm)

10/24/16

N

1.9

 

4

4

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

Mercury (inorganic) (ppb)

10/24/16

N

0

 

2

2

Erosion of natural deposits; discharge from refineries and factories; runoff from landfills; runoff from cropland

Selenium (ppb)

10/24/16

N

0

 

50

50

Discharge from petroleum and metal refineries; erosion of natural deposits; discharge from mines

Thallium (ppb)

10/24/16

N

0

 

0.5

2

Leaching from ore-processing sites; discharge from electronics, glass, and drug factories

 

While your drinking water meets EPA’s standard for arsenic, it does contain low levels of arsenic. EPA’s standard balances the current understanding of arsenic’s possible health effects against the costs of removing arsenic from drinking water. EPA continues to research the health effects of low levels of arsenic, which is a mineral known to cause cancer in humans at high concentrations and is linked to other health effects such as skin damage and circulatory problems.

 

Nitrate/Nitrite Contaminants

 

Contaminant (units)

 

MCL Violation

Y/N

Your

Water

Range

 

Low        High

MCLG

MCL

Likely Source of Contamination

Nitrate (as Nitrogen) (ppm)

N

0

N/A

10

10

Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits

Nitrite (as Nitrogen) (ppm)

N

0

N/A

 

 

1

1

Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits

 

Nitrate in drinking water at levels above 10 ppm is a health risk for infants of less than six months of age.  High nitrate levels in drinking water can cause blue baby syndrome. Nitrate levels may rise quickly for short periods of time because of rainfall or agricultural activity. If you are caring for an infant you should ask advice from your health care provider.

 

Synthetic Organic Chemical (SOC) Contaminants Including Pesticides and Herbicides

 

Contaminant (units)

 

Sample Date

MCL Violation

Y/N

Your

Water

Range

 

Low        High

MCLG

MCL

Likely Source of Contamination

2,4-D (ppb)

8/22/16

 

N

0

 

70

70

Runoff from herbicide used on row crops

2,4,5-TP (Silvex) (ppb)

8/22/16

N

0

 

50

50

Residue of banned herbicide

Alachlor (ppb)

8/22/16

N

0

 

0

2

Runoff from herbicide used on row crops

Atrazine (ppb)

8/22/16

N

0

 

3

3

Runoff from herbicide used on row crops

Benzo(a)pyrene (PAH) (ppt)

8/22/16

N

0

 

0

200

Leaching from linings of water storage tanks and distribution lines

Carbofuran (ppb)

8/22/16

N

0

 

40

40

Leaching of soil fumigant used on rice and alfalfa

Chlordane (ppb)

8/22/16

N

0

 

0

2

Residue of banned termiticide

Dalapon (ppb)

8/22/16

N

0

 

200

200

Runoff from herbicide used on rights of way

 

Di(2-ethylhexyl)           adipate (ppb)

 

8/22/16

N

0

 

400

400

Discharge from chemical factories

 

Di(2-ethylhexyl)          phthalate (ppb)

 

8/22/16

N

0

 

0

6

Discharge from rubber and chemical factories

DBCP [Dibromochloropropane] (ppt)

8/22/16

N

0

 

0

200

Runoff/leaching from soil fumigant used on soybeans, cotton, pineapples, and orchards

Dinoseb (ppb)

8/22/16

N

0

 

7

7

Runoff from herbicide used on soybeans and vegetables

Endrin (ppb)

8/22/16

N

0

 

2

2

Residue of banned insecticide

EDB [Ethylene dibromide] (ppt)

8/22/16

N

0

 

0

50

Discharge from petroleum refineries

Heptachlor (ppt)

8/22/16

N

0

 

0

400

Residue of banned pesticide

Heptachlor epoxide (ppt)

8/22/16

N

0

 

0

200

Breakdown of heptachlor

Hexachlorobenzene (ppb)

8/22/16

N

0

 

0

1

Discharge from metal refineries and agricultural chemical factories

Hexachlorocyclo-pentadiene (ppb)

8/22/16

N

0

 

50

50

Discharge from chemical factories

Lindane (ppt)

8/22/16

N

0

 

200

200

Runoff/leaching from insecticide used on cattle, lumber, gardens

Methoxychlor (ppb)

8/22/16

N

0

 

40

40

Runoff/leaching from insecticide used on fruits, vegetables, alfalfa, livestock

Oxamyl [Vydate] (ppb)

8/22/16

N

0

 

200

200

Runoff/leaching from insecticide used on apples, potatoes and tomatoes

PCBs [Polychlorinated biphenyls] (ppt)

8/22/16

N

0

 

0

500

Runoff from landfills; discharge of waste chemicals

Pentachlorophenol (ppb)

8/22/16

N

0

 

0

1

Discharge from wood preserving factories

Picloram (ppb)

8/22/16

N

0

 

500

500

Herbicide runoff

Simazine (ppb)

8/22/16

N

0

 

4

4

Herbicide runoff

Toxaphene (ppb)

8/22/16

N

0

 

0

3

Runoff/leaching from insecticide used on cotton and cattle

 

Volatile Organic Chemical (VOC) Contaminants

 

Contaminant (units)

 

Sample Date

MCL Violation

Y/N

Your

Water

Range

 

Low        High

MCLG

MCL

Likely Source of Contamination

Benzene (ppb)

7/19/16

N

0

 

0

5

Discharge from factories; leaching from gas storage tanks and landfills

Carbon tetrachloride (ppb)

7/19/16

N

0

 

0

5

Discharge from chemical plants and other industrial activities

Chlorobenzene (ppb)

7/19/16

N

0

 

100

100

Discharge from chemical and agricultural chemical factories

o-Dichlorobenzene (ppb)

7/19/16

N

0

 

600

600

Discharge from industrial chemical factories

p-Dichlorobenzene (ppb)

7/19/16

N

0

 

75

75

Discharge from industrial chemical factories

1,2 – Dichloroethane (ppb)

7/19/16

N

0

 

0

5

Discharge from industrial chemical factories

1,1 – Dichloroethylene (ppb)

7/19/16

N

0

 

7

7

Discharge from industrial chemical factories

cis-1,2-Dichloroethylene (ppb)

7/19/16

N

0

 

70

70

Discharge from industrial chemical

factories

trans-1,2-Dichloroethylene (ppb)

7/19/16

N

0

 

100

100

Discharge from industrial chemical factories

Dichloromethane (ppb)

7/19/16

N

0

 

0

5

Discharge from pharmaceutical and chemical factories

1,2-Dichloropropane (ppb)

7/19/16

N

0

 

0

5

Discharge from industrial chemical factories

Ethylbenzene (ppb)

7/19/16

N

0

 

700

700

Discharge from petroleum refineries

Styrene (ppb)

7/19/16

N

0

 

100

100

Discharge from rubber and plastic factories; leaching from landfills

Tetrachloroethylene (ppb)

7/19/16

N

0

 

0

5

Discharge from factories and dry cleaners

1,2,4 –Trichlorobenzene (ppb)

7/19/16

N

0

 

70

70

Discharge from textile-finishing factories

1,1,1 – Trichloroethane (ppb)

7/19/16

N

0

 

200

200

Discharge from metal degreasing sites and other factories

1,1,2 –Trichloroethane (ppb)

7/19/16

N

0

 

3

5

Discharge from industrial chemical factories

Trichloroethylene (ppb)

7/19/16

N

0

 

0

5

Discharge from metal degreasing sites and other factories

Toluene (ppm)

7/19/16

N

0

 

1

1

Discharge from petroleum factories

Vinyl Chloride (ppb)

7/19/16

N

0

 

0

2

Leaching from PVC piping; discharge from plastics factories

Xylenes (Total) (ppm)

7/19/16

N

0

 

10

10

Discharge from petroleum factories; discharge from chemical factories

 

 

Lead and Copper Contaminants

 

Contaminant (units)

 

Sample Date

Your

Water

# of sites found above the AL

MCLG

AL

Likely Source of Contamination

Copper (ppm)

(90th percentile)

8/10/12

.3

0

1.3

AL=1.3

Corrosion of household plumbing systems; erosion of natural deposits

Lead  (ppb)

(90th percentile)

8/10/12

 

0

0

0

AL=15

Corrosion of household plumbing systems, erosion of natural deposits

 

Disinfectants and Disinfection Byproducts Contaminants

 

Contaminant (units)

 

MCL/MRDL

Violation

Y/N

Your

Water

RAA (Stage 1)

Range

Low     High

MCLG

MCL

Likely Source of Contamination

TTHM (ppb)                                [Total Trihalomethanes]

N

.012

.01-.02

N/A

80

By-product of drinking water chlorination

HAA5 (ppb)

[Total Haloacetic Acids]

N

.0043

0-.0043

N/A

60

By-product of drinking water disinfection

Bromate (ppb)

N

 

 

0

10

By-product of drinking water disinfection

Chlorite (ppm)

N

 

 

0.8

1.0

By-product of drinking water chlorination

Chlorine dioxide (ppb)

N

 

 

MRDLG = 800

MRDL = 800

Water additive used to control microbes

Chloramines (ppm)

N

 

 

MRDLG = 4

MRDL = 4

Water additive used to control microbes

Chlorine (ppm)

N

1.5

.3-2.0

MRDLG = 4

MRDL = 4

Water additive used to control microbes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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.

For HAA5:  Some people who drink water containing haloacetic acids in excess of the MCL over many years may have an increased risk of getting cancer.