Water Quality Report

2014
Water Quality Report
PWSID# 04-25-010
annual water report
The City of New Bern is pleased to present this year’s Annual Drinking
Water Quality Report, also known as the Consumer Confidence Report.
Our goal is to provide you with a safe and dependable supply of drinking
water. This report contains information about the sources of our water
supply, treatment methods, and results of testing performed throughout 2014.
Terms and Abbreviations
This report contains terms and abbreviations that you may not be familiar with. To
help you better understand these terms we have provided the following definitions:
Action Level (AL) – The concentration of a contaminant which, if exceeded, triggers
additional treatment and/or public notification requirements.
Million Fibers per Liter (MFL) – A measure of the presence of asbestos fibers (longer
than 10 micrometers) in drinking water.
Maximum Contaminant Level Goal (MCLG) – The level of a contaminant in drinking
water below which there is no known or expected risk to health. MCLG’s allow for
a margin of safety.
Maximum Contaminant Level (MCL) – The highest level of a contaminant allowed
in drinking water. MCL’s are set as close to the MCLG’s as feasible using the best
available treatment technique. A person would have to drink 2 liters of water every
day at the MCL level for a lifetime in order to have a one-in-a-million chance of
having the described health effect.
90th Percentile – The sample result that exceeds 90% of all sample results and is
exceeded by 10%.
Parts per million (ppm) - A common unit of measurement for substances found in
drinking water. One part per million corresponds to one minute in two years, or a
single penny in $10,000.
Parts per billion (ppb) - 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) - A measure of radioactivity in water.
EPA – Environmental Protection Agency
N/A – Not Applicable 2 - 2014 Water Quality Report
FDA – Food and Drug Administration
ND – None Detected
Our Water Supply
The City of New Bern provides drinking water for over 30,200 customers in the
New Bern and surrounding areas including Carolina Colours, Clarks, Cove City,
the Craven County Industrial Park, Taberna, and Trent Woods. Total water usage
for 2014 was 1.253 billion gallons, a daily average of 3.43 million gallons. The
City’s Water Treatment Division employs 20 wells, a filter/softener water treatment
facility, 3 ground storage tanks, 5 booster pump stations and 6 elevated storage
tanks to provide up to 8.65 million gallons of daily water production and 9.7
million gallons of finished water storage.
Water Treatment Process
Aeration/Oxidation/Filtration- The treatment process begins with aeration, which
causes metallic contaminants such as iron and manganese to begin oxidizing
(rusting) naturally. Aeration also removes most of the hydrogen sulfide in the
water. After some detention time, potassium permanganate is added to ensure that
oxidation is complete prior to entering the greens and filters, as any metals not fully
oxidized will simply pass through. The filters also remove any remaining hydrogen
sulfide.
Softening- Filtered water passes through the ion-exchange softeners to remove
calcium and magnesium. The softeners remove all hardness, so it is necessary to
bypass a fraction of the water in order to reach the desired hardness level. Softening
is by far the most expensive aspect of this treatment system. Salt used to regenerate the softeners accounts for a third of the Water Treatment Plant’s operational
costs, including electricity. Extremely soft water also has corrosive qualities in the
distribution system, resulting in increased wear and maintenance of pumps, valves,
and metallic pipe and fittings. Our finished water hardness level is the result of
research, testing and consultation with surrounding systems utilizing similar source
water and treatment techniques.
Chemical Addition- Chlorine and ammonia are then added for disinfection and
prevention of microbial growth in the distribution system. Ortho-phosphate, a
corrosion inhibitor, is also added to further prevent the finished water from reacting with metallic parts (i.e. iron, lead, copper) of the City’s distribution and home
plumbing systems. The water is now ready for distribution and consumption.
2014 Water Quality Report - 3
What You Should Know About Chloramines
In June 2010, the City of New Bern began using chloramines as a secondary
disinfectant. This is achieved by adding a small amount of ammonia shortly after the
water is chlorinated. Compared to free chlorine, chloramines form fewer chemical
by-products in the distribution system, improve taste and odor characteristics, and last
longer in the distribution system to prevent bacterial growth.
Chloraminated water is safe for drinking, cooking, bathing and all uses we have for
water every day. However, there are two groups of people who need to take special
care with chloraminated water: kidney dialysis patients and fish owners. Just like free
chlorine, chloramines must be removed from water used in kidney dialysis machines.
If you are a dialysis patient or have questions, please call your physician or dialysis
center.
Chloramines, like free chlorine, are also toxic to fish and must be removed
before adding City water to aquariums and tanks. Please consult your pet store to
ensure that you are using a water conditioner that is effective for chlorinated and
chloraminated water.
Annual Reversion to Free Chlorine
It is customary for water systems using chloramines to revert back to free chlorine for
6-8 weeks annually. Free chlorine serves to remove any microbial growth that may
have formed while using chloramines, which is a less potent but more stable disinfectant. This is a standard water treatment practice to keep our distribution system clean
and free of potentially harmful bacteria throughout the year. During this period,
customers may notice more chlorine taste and odor. This will go away immediately
once the water system is returned to chloramines.
Water systems typically perform high velocity flushing of water mains during and
shortly after the reversion period. You may notice some discoloration of your water
after flushing is performed in your area. If this happens, please run water for five
minutes to clear your service line. If the discoloration persists, please contact the
Water Treatment Division at 639-7568.
– Free Chlorine Reversion Notice –
Beginning July 20 and continuing until September 14, 2015, The City of New Bern
will temporarily change the disinfectant used in the water treatment process from
chloramines to free chlorine. The reversion period will be followed by continued
flushing throughout the distribution system. Most of the flushing will take place
between 9pm and 3am to minimize customer inconvenience. The City of New
Bern will directly contact dialysis centers, pet stores and other water quality sensitive
facilities to ensure that they are prepared. For more information, please go to
www.newbern-nc.org or contact the City of New Bern Water Treatment Division at
639-7568.
4 - 2014 Water Quality Report
Water Contaminants
All sources of drinking water are subject to potential contamination by substances
that are naturally occurring or manmade. These substances can be microbes
(viruses and bacteria), in-organics (metals and salts), synthetic organics (pesticides),
volatile organics (petroleum based) and/or radioactive contaminants.
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.
In order to ensure that tap water is safe to drink, EPA prescribes regulations which
limit the amounts 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. 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.
Special Health Concerns
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 microbiological contaminants are available from the Safe
Drinking Water Hotline (1-800-426-4791).
Preventing Lead/Copper Contamination at Home
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 New Bern 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.
Additional tips for minimizing lead/copper exposure:
- Use only cold water for cooking and making beverages
- Remove and clean faucet screens regularly
2014 Water Quality Report - 5
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 Contamination 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 New Bern 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 following table.
The complete SWAP report for the City of New Bern may be viewed on the
Web at: http://www.deh.enr.state.nc.us/pws/swap.
obtain
printed
copy ofon the We
The complete SWAP report for the City of To
New
Bern amay
be viewed
this report, please mail a written request to: Source Water Assessment Program
http://www.deh.enr.state.nc.us/pws/swap. To obtain a printed copy of this report, pl
Report Request, 1634 Mail Service Center, Raleigh, NC 27699-1634. You may
Source
Water
Program Report Request,
1634 Mail
also
email
yourAssessment
request to [email protected].
Please indicate
yourService
system Center,
name, Raleigh
email your
request to
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systemnumber.
name, PWSID (#
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(#04-25-010),
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provide your name,Please
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have
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Assessment staff by phone at 919-715-2633.
Water Assessment staff by phone at 919-715-2633.
Inherent
Source Name
Vulnerability
Contaminant
Susceptability
Rating
Rating
Rating
Cove City Well #1
Lower
Lower
Lower
Cove City Well #2
Lower
Moderate
Moderate
Cove City Well #3
Lower
Moderate
Moderate
Cove City Well #4
Lower
Moderate
Moderate
Cove City Well #5
Lower
Lower
Lower
It is important to understand that a susceptibility rating of “higher” does not im
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6 - 2014
Qualitytoilets
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MCL
Contaminant
(units)
Violation
MCLG
MCL
Likely Source of Contamination
Radioactive
Contaminants
Radioactive
Contaminants
Sample
Your
MCL
Date
Water
Contaminant (units)
Violation
MCLG
MCL
Likely Source of Contamination
Sample
Your
Y/NMCL
MCL
Date
Water
Contaminant (units)
MCLG
MCL
Likely Source of Contamination
Sample Violation
Sample
YourYour
Y/N
Date
Water
Contaminant
(units)
Violation
MCLG
MCL
Likely
Source
of Contamination
(units)
Violation
MCLG
MCL
Likely
Source
of Contamination
Y/N
AlphaContaminant
emitters (pCi/L)
2014
N
4.3Water
0
15
Erosion
of natural
deposits
Date
Date
Water
Y/N
Alpha emitters (pCi/L)
2014
N Y/N
4.3
0
15
Erosion of natural deposits
Alpha emitters and
(pCi/L)
2014
N Contaminants
4.3
0
15
Erosion of natural deposits
Disinfectants
Disinfection
Byproducts
Alpha
emitters
(pCi/L)
Erosion
of natural
deposits
2014
N
Alpha
emitters
(pCi/L)
N Contaminants
4.3 4.3
0 0
15 15
Erosion
of natural
deposits
Disinfectants
and
Disinfection2014
Byproducts
Disinfectants and Disinfection
MCL/MRByproducts
Your Contaminants
Disinfectants
Disinfection
Byproducts
Contaminants
Disinfectants
andand
Disinfection
Range
MCL/MRByproducts
Your Contaminants
Contaminant
DL
Water
Range
MCL/MR
Your
MCLG
MCL
Likely Source of Contamination
Low
Contaminant
DL
Water
MCL/MR
Your Range
MCL/MR
Your
(units)
Violation
RAA
MCL
Likely Source of Contamination
Low
Contaminant
DL
Water
Range MCLG
Range
High
(units)
Violation
RAA
MCLG
MCL
Likely Source of Contamination
Low
Contaminant
DL (Stage
Water
Contaminant
DL
Water
Y/N
2)
High
(units)
Violation
RAA
Low MCLG
MCLG MCL
MCL Likely
Likely
Source
of Contamination
Source
of Contamination
Low
Y/N
(Stage
2)
(units)
Violation RAA
LRAA High
Violation
TTHM(units)
(ppb)
Y/N
(Stage 2)
High
High
By-product of drinking water
TTHM (ppb)
Y/N (Stage
(Stage
2) 29 to 33
Y/N
2)
N
33
N/A
80
[Total
By-product
of
drinking water
TTHM (ppb)
N
33
29 to 33
chlorination of drinking water
N/A
80
[Total
By-product
TTHM
(ppb)
TTHM
(ppb)
Trihalomethanes]
N
33
29 to 33
chlorination
N/A
80
[Total
By-product
of
drinking
By-product
of
drinking
waterwater
Trihalomethanes]
chlorination
N N
33 33
29 to2933to 33 N/AN/A
[Total
80 80
[Total
HAA5
(ppb)
Trihalomethanes]
chlorination
chlorination
By-product
of drinking water
HAA5
(ppb)
Trihalomethanes]
Trihalomethanes]
N
13.8
10.2 to 13.8
[Total
Haloacetic
N/A
60
By-product of drinking water
HAA5
(ppb)
N
13.8
10.2 to 13.8
disinfection of drinking water
[Total
Haloacetic
N/A
60
By-product
HAA5
(ppb)
HAA5
(ppb)
Acids]
N
13.8
10.2 to 13.8
disinfection
[Total
N/A
60
By-product
drinking
By-product
of of
drinking
waterwater
2.Haloacetic
Table
of Detected
Contaminates
Acids]
10.2
to 13.8 N/AN/A
N NUnregulated
13.813.8 10.2
to 13.8
[Total
Haloacetic
[Total
Haloacetic
60 60 disinfection
MRDL
Water
additive used to control
Acids]
disinfection
disinfection
N
2.36
1.1
to
3.6
Chloramines
(ppm)
MRDL
=
4
MRDL
Water
additive used to control
Acids] “Unregulated
Acids]
Contaminate
contaminates
be
N
2.36 Monitoring
1.1 to 3.6 Rule
G =34 (UCMR3)”
microbes
Chloramines
(ppm)
MRDL = 4These
MRDL
Water
additive used must
to control
N
2.36
1.1 to 3.6
G MRDL
=4
microbes
Chloramines
(ppm) in report
MRDL = 4 Regulated
Water
additive
to
control
MRDL
Water
additive
used
toto control
included
a 2.36
separate
table
Contaminates
MRDL
Water
additive
usedused
control
G = 4the Detected
N but in2.36
1.1
to 3.6from
N
1.1
Chloramines
(ppm)
MRDL
Chloramines
(ppm)
MRDL
==44= 4microbes
N
0.98
0.4to
to3.6
1.4
Chlorine
(ppm)
MRDL
MRDL
Water
additive
used
to
control
G
=
4
microbes
GG==44
microbes
N
0.98
0.4 to 1.4
microbes
Chlorine Above.
(ppm)
MRDL = 4 Water
MRDL
additive used to control
N
0.98
0.4 to 1.4
G
=
4
microbes
Chlorine (ppm)
MRDL
=
4
MRDL
Water
additive
to control
MRDL
Water
additive
usedused
to control
0.41.4
to 1.4 G = 4
N N
0.980.98
0.4 to
Chlorine
(ppm)
MRDL
Chlorine
(ppm)
MRDL
= 4 = 4microbes
microbes
G =G4 = 4
microbes
Water Quality Data Table of Detected Unregulated Contaminants
*Unregulated Contaminate Monitoring Rule 3 (UCMR3) Contaminants
2. Table of Detected Unregulated Contaminates
Sample
Reported
Range
Contaminant
(units)Contaminate Monitoring Rule 3 (UCMR3)” These contaminates must be
“Unregulated
Date
Level
Low to High
included in report but in a separate table from the Detected Regulated Contaminates
Above.
chromium
(total) (µg/L)
2014
0.28
ND to 0.28
Water Quality Data Table of Detected Unregulated Contaminants
*Unregulated
Contaminate
molybdenum
((µg/L) Monitoring Rule
20143 (UCMR3)
1.6Contaminants
ND to 1.6
Sample
Date
Reported
Level
chromium (total) (µg/L)
strontium (µg/L)
2014
0.28
ND to 0.28
molybdenum ((µg/L)
2014
1.6
ND to 1.6
strontium (µg/L)
2014
84
12 to 84
Contaminant (units)
vanadium (µg/L)
chlorate (µg/L)
2014
2014
2014
84
0.23
1500
2014
0.23
chlorate
(µg/L)
1,4-dioxane
2014
1500
2014 180 to 1500
0.26
2014
0.26
(µg/L)
bromochloromethane (µg/L)
bromochloromethane (µg/L)
2014
2014
0.29
Distribution Water
Quality Sampling Station
Range
Low to High
vanadium (µg/L)
1,4-dioxane (µg/L)
1
1
12 to 84
ND to 0.23
180 to 1500
ND to 0.23
ND to 0.26
ND to 0.26
0.29
ND to 0.29
ND to 0.29
*The
1996
amendment
toDrinking
the Safe
Drinking
Actonce
(SDWA)
once everyProtection
five years, the U.S. Environmental Protection
*The 1996
amendment
to the Safe
Water
Act (SDWA)Water
require that
every fiverequire
years, thethat
U.S. Environmental
Agency (EPA)
issue issue
a new list
no more
30 unregulated
contaminates
to be monitored
by public waterto
systems
(PWSs). The by public water systems (PWSs). The
Agency
(EPA)
a ofnew
list than
of no
more than
30 unregulated
contaminates
be monitored
Unregulated Contaminate Monitoring Rule (UCMR) provides EPA and other interested parties with scientifically valid data on the
Unregulated
Contaminate
Monitoring
Rule
(UCMR)
provides
EPA
and
other
interested
parties with scientifically valid data on the
occurrence of contaminates in drinking water. These data serve as a primary source of occurrence and exposure information that the
occurrence
of contaminates
in drinking water. These data serve as a primary source of occurrence and exposure information that the
agency uses to develop
regulatory decisions.
agency uses to develop regulatory decisions.
2014 Water Quality Report - 7
1
1
Water Conservation and Protection
Our water resources are a vital part of the quality of life within our community. Please
help us to conserve and protect these valuable resources for future generations to enjoy.
Here are some ways you can help:
•Repair all leaks and drips. A slow drip can waste 15-20 gallons per day.
Periodically turn off all taps and water using appliances, check your meter’s
leak detector, and again after 15 minutes. If it has moved, you have a leak.
•Inspect toilets for leaks by putting a few drops of food coloring in the tank,
then check after a few minutes to see if there is color in the bowl. A
seemingly invisible toilet leak can lose up to 100 gallons per day.
•Water lawns only when needed, preferably before 10am or after 6pm.
One inch of water per week is sufficient to keep plants and lawns healthy.
Water Quality Auto Flushing Station
Multi-tap Service Station used for Special Events
For More Information: If you have any questions concerning this report or your water quality, please
contact the City of New Bern Water Treatment Division at 252-639-7568. If you wish to learn
more, you may attend any of the regularly scheduled Board of Aldermen meetings, which are
held on the second and fourth Tuesdays of each month at 7:00 p.m. in the City Hall Courtroom,
300 Pollock Street.