2013 Water Quality Report CITY 1
Tigard
The City of Tigard provides clean,safe,dependable SUMMER
drinking water to the residents of Durham,King City, 2014
two-thirds of Tigard,and Tigard Water District. KN OWE2DTION
Annual2013 Report
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The Purpose of this Report.............2
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Future Water Supply.......................2
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Source Information.........................2
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Tigard Water Service Area Map.......2
2013 Water Quality J?
Analysis Results ........................3,4 ,
Special Notice for Immuno-
compromised Persons....................4 Y dF +
Information on Detected
Contaminants.................................5 r
Cryptosporidium ............................6
Definitions......................................6
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TWSA Source Water Assessment....6 ' 0
What the EPA Says About Drinking •; - '� f ,`,
Water Contaminants.......................7 `
Lead in the Drinking Water... ��t
Are You at Risk?.............................7
What the EPA Says Aboutor
Drinking Water Contaminants..........7
Frequently Asked Questions.............?
City of Tigard Contact Information...8
Lake Oswego-Tigard Water
Partnership:Community Benefits....8
Are you interested in learning : r
more about your water?.................8
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1
•
ere Does Ti ard's Water Come From.? -
WATER SYSTEM INFORMATION S 0 U R C E I N F 0 R M A T 1 0 N
The City of Tigard currently purchases nearly 90 percent of its water from wholesale water providers
The Purpose like the Portland Water Bureau (PWB).The PWB manages the Bull Run Watershed,a
of this Re ort surface water supply located in the Mount Hood National Forest.The watershed encompasses
p102 square miles and typically receives 80-170 inches of rainfall per year.In cases of emergency,
high demand or when water quality is compromised,the PWB switches to its groundwater
The City of Tigard is responsible for source—the Columbia South Shore Well Field.All water obtained from the PWB is unfiltered.
providing a clean,safe,dependable Tigard also purchases water from the City of Lake Oswego.Lake Oswego draws its water from the
supply of drinking water to the Clackamas River Basin.Encompassing nearly 940 square miles,the basin begins in the Mount
58,000 residents of the Tigard Hood National Forest.Drawn from the Clackamas River,the water is pumped through a pipeline
Water Service Area (TWSA).The buried beneath the Willamette River to the Lake Oswego Treatment Plant located in West Linn.
service area includes the cities of
Durham, King City,two-thirds During periods of high water demand,Tigard can supplement its supply with water from
of Tigard and the Tigard Water city-owned aquifer storage and recovery wells,and a native groundwater well.
District. Entities within this
service area are represented by the TIGARD WATER SERVICE AREA
Intergovernmental Water Board. _
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The board advises the Tigard City
Council on water-related matters. :..:Tigard Water Service Boundary
Tualatin Valley Water District
�•Valte �
This report summarizes Ti and's Tigard water District erh oaa m �wate�
2013 water quality data. / °�°� ♦ District
•/ _ ��y{�Services
Additional information is provided BEAVERTON • :� —Area—
to inform,educate and update
consumers on water issues affecting ; Tigard —
the community.
Water
Barrows Roa�#
••••• - Service
Future Water Supply EF
Area Qac
■ UNINCORPORATED TIGARD ■3
The Lake Oswego Tigard Water ■ WASHINGTON COUNTY s ■
■ ... REPRESENTED ■'�
Partnership will provide reliable, '5■BY THE TIGARD
'111 WATER DISTRICT
high-quality drinking water to s■
1..008. Durham Road
your home or business in 2016. Beef Bex%6 pad `.//■� M
For more information visit KING CITY /.#* .
www.lotigardwater.org, and see ■ /.• *,Fp 1 ■
"Community Benefits" on page 8 of ♦��•i� ♦ o 44
TUALATIN ■��N
this report. fay10 ♦'
2 of Tigard Water Division
2013 Water Quality Analysis Results
Federal standards regulate contaminants in order to protect drinking water quality.
Tigard's wholesale water providers test for more than 200 regulated and unregulated contaminants.
Contaminant MCL MCLG TWSA Results Violation? Typical Source
LOW Range HIGH YES/NO
MICROBIOLOGICALS
Fecal Coliform and 0 0 Not detected NO Human and animal
E.coli Bacteria fecal waste
Giardia TT required: NA 2 Giardia cysts in NO Animal waste
Disinfection to 11.3 liters
inactive 99.9%
of cysts
Total Coliform Must not detect 0%of samples Not Detected NO Naturally present in
Bacteria coliform bacteria with detectable the environment
in more than 5% coliform
of samples per bacteria
month
Turbidity(NTU) Cannot exceed NA 0.16 3.13 NO Soil erosion
5 NTU more than
2 times in
12 months
INORGANICS
Arsenic(ppb) 10 0 <0.50 0.88 NO Erosion of natural
Barium(ppm) 2 2 0.00091 0.0081 NO deposits in
groundwater aquifers
Chromium—Total(ppb) 100 100 <0.50 0.82 NO
Copper(ppm) NA 1.3 <0.00050 0.0011 NO
Fluoride(ppm) 4 4 <0.025 0.13 NO Water treatment
additive,erosion of
natural deposits
Nitrate(ppm) 10 10 ND 1.30 NO Erosion of natural
deposits,runoff from
Nitrite(ppm) 1 1 ND 0.01 NO fertilizer,leaching
from septic tanks and
sewage
RADIOLOGICALS
Gross Alpha(pCi/1) NA' 0 ND 3.1 NO Erosion of natural
Gross Beta(pCi/1) NA 0 ND 1.8 NO deposits
Radium 226 and NA 0 ND 1.1 NO
228(combined)
Community water systems monitor for gross alpha at a screening level of 15 pCi/I and gross beta at a screening level of 50 pCi/I.The screening level is not health-based,but
rather a level at which additional and increased monitoring would be required.Those systems detecting gross alpha or gross beta at or above the screening level are required
to meet an MCL of four millirems per year.
2 The MCL for beta particles is 4 mrem/year.The EPA recognizes that laboratories often report these results in pCi/I and that there is no simple conversion between the two units.
Therefore,systems report the detected level for beta particles in pCi/I.
of Tigard Water Division 1 3
2013 Water Quality Analysis Results, cont'd.
Contaminant MCL MCLG TWSA Results Violation? Typical Source
LOW Range HIGH YES/NO
DISINFECTION BYPRODUCTS
Chlorine(ppm) 4 4 ND 3.6 NO Water additive used
to control microbes
Haloacetic Acids(ppb) 60 NA 20.20 43.3 NO Byproduct of drinking
water disinfection
Total Trihalo- 80 NA 10.90 45.5 NO
methanes(ppb)
UNREGULATED AND SECONDARY (regulations provide advisory limits only)
Radon(pCi/1) No Standard No Standard ND 426.0 NO Found in natural
aquifer deposits
Sodium(ppm) 20 20 ND 17.0 NO Erosion of natural
deposits,water
treatment additive
Sulfate(ppm) 250 250 ND 2.8 NO Naturally occurring
substance in drinking
water
Lead and Copper Sampling at High Risk Residential Water Taps
Contaminant 90th Number of Sites MCLG Lead and Action Typical Source
Percen- Exceeding the Copper Rule Level
tile Action Level Limit Reached
Copper(ppm) 0.48 0 of 108 samples(0%) 1.3 AL exceeded if 10%or No Corrosion of household
exceeded the copper more of homes tested and commercial
action level of 1.3 ppm have levels above 1.3 ppm plumbing
Lead(ppb) 16.0 13 of 108 samples(12%) 15.0 AL exceeded if 10%or Yes
exceeded the lead action more of homes tested
level of 15 ppb have levels above 15 ppb
AL:action level,MCL:maximum contaminant level,MCLG:maximum contaminant level goal,MRDL:maximum residual disinfectant level,MRDLG:maximum residual
disinfectant level goal,MDL:method detection limit,ND:non-detected,NA:not applicable,NTUs:nephelometric turbidity units,ppm:parts per million,mg/L:milligrams
per liter,ppb:parts per billion,pg/L:mircograms per liter,pCi/I:picocurries per liter,TT:treatment technique.For complete definitions,see page 6.
SPECIAL NOTICE FOR IMMUNO-COMPROMISED PERSONS IL
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.Environmental
Protection Agency and Centers for Disease Control and Prevention guidelines on appropriate
means to lessen the risk of infection by Cryptosporidium and other microbial contaminants
are available from the Safe Drinking Water Hotline at 800-426-4791.
4 of Tigard Water Division
Information on Detected Contaminants
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In 2013,more than 200 regulated levels to a inimum,while maintaining t tri is do not present a risk
and unregulated contaminants were eels of chlorine. human hea h.
monitored by Tigard's wholesale wat Gross Alp ,Gross Beta and Ra um Radon is a n urally occuV
g radio-
providers. In addition to these effor 226 and 228 combined) are particl s active gas that stasted
Tigard staff concurrently tested t water emitted from th decay of naturd1p4itS.
or smelled.R n has been det ted at
quality throughout the TWSA d' tribution man-made radio e mineral varying leve n water from Tigar a ui er
system.If a known health-relatedstorage an ecovery wells and native
contaminant is not 1in this Nitrates and Nitrites are formed thr ground t r well.For more information
report,it wa �ekcyd in the the erosion of natural deposits,agricultu
drin ' t rr activity and leaching of septic tanks. ,call the EPA's Radon Hotline
at 800-SOS-RADON or visit www.epa.
e e 1 tin arils regulate conta 'nants Total Coliform Bacteria are naturally gov/radon/rnwater.html.
t otect drinking water quality.T Hers
resent in the environment and may
p g q y p y Sodium is formed through the erosion of
standards limit the levels of contamis indicate other potentially harmful bacteria na r deposits and maybe added to water,
known to occur in water that can adly may be present.Chlorine is added to the
affect public health. drinking water supply to kill these bacteria. du treatment.
Sulfateis formed through the eresiAn`'
REGULATED CONTAMINANTS Turbidity is a measure of the amount of natural deposits and at high levels can
Arsenic,Barium,Chromium (total) of sediment suspended in the water.This contribute to a salty taste and/or odor
Copper,and Fluoride are naturally sediment can interfere with disinfection in water.
occurring elements that can dissolve into and provide a medium for microbial
the groundwater supply.At the levels found growth.Large storm events
in the drinking water,they are unlikely to can result in increased r
contribute to adverse health effects. turbidity. -
Chlorine is added to maintain disinfection
requirements throughout the water UNREGULATED
CONTAMINANTS
distribution system.
Water quality standards for
Disinfection Byproducts (Haloacetic unregulated contaminants }
Acids and Total Trihalomethanes)are are established as guidelines
formed through chemical reactions between to assist public water systems
chlorine and naturally occurring organic in managing drinking water 40d
matter in the water.The disinfection process for aesthetic considerations such '.
is carefully controlled to keep byproduct as taste,color and odor.These
OregonHealth
To learn about the health effects of contaminants, visit the Oregon Health Authority website at:
bUp.11public.health.oregon.gov/HealthyEnvironments/DrinkingWater/Monitoring/
Authority HealthEffects/Pages/index.aspx
of Tigard Water Division 1 5
Cryptosporidium tos oridium Definitions
T•
k * Action Level (AL):The concentration of Non-detected (ND):Not detected at or
a contaminant,which,if exceeded,triggers above the MDL.
treatment or other requirements that a water
Not Applicable(NA):Not applicable for
system must follow. the specified contaminant.
► Maximum Contaminant Level (MCL):
* � The highest level of a contaminant that is Nephelometric Turbidity Units
allowed in drinking water.MCLS are setas (NTUs):Turbidity is a measure of how
cclear the water looks.Turbidity can interfere
lose to the MCLGs as feasible using the best
available treatment technology. with disinfection and provide a medium for
microbial growth.
V Maximum Contaminant Level Goal parts per Million (ppm)or Milligrams
(MCLG):The level of contaminant in per Liter(mg/L):A unit measurement
Cryptosporidium is a micro- drinking water below which there is no known describing the level of detected contaminants
organism (protozoan) naturally or expected risk to health.MCLGs allow for a that is one part by weight of analyte to one
present in surface water supplies margin of safety. million parts by weight of the water sample.
throughout the world. Surface water Maximum Residual Disinfectant One part per million corresponds to one penny
supplies are particularly vulnerable Level (MRDL):The highest level of a in$10,000 or approximately one minute in
if they receive runoff or pollution disinfectant allowed in drinking water. two years.One part per million is equal to
from human or animal wastes. There is convincing evidence that addition 1,000 parts per billion.
Since wildlife inhabits the Bull Run of a disinfectant is necessary for control of
microbial contaminants. Parts per Billion (ppb)or Mircograms
and Clackamas River Watersheds, per Liter(pg/L):A unit measurement
the managing agencies regularly Maximum Residual Disinfectant describing the level of detected contaminants
monitor for Cryptosporidium. Level Goal (MRDLG):The level of a that is one part by weight of analyte to one
Occasionally, low levels of Crypto- drinking water disinfectant below which billion parts by weight of the water sample.
sporidium have been found. there is no known or expected risk of health. One part per billion corresponds to one penny
New national standards have been MRDLGs do not reflect the benefits of the in$10,000,000 or approximately one minute
established to further reduce the risks use of disinfectants to control microbial in 2,000 years.
of illness from Cryptosporidium. contamination. Picocurries per Liter(pCi/1):A standard
Symptoms of infection include nausea, Method Detection Limit(MDL):The measurement of radioactivity in water.
abdominal cramps and diarrhea. lowest concentration of a substance that can Treatment Technique(TT):A required
Most healthy individuals are able be accurately measured using applicable process intended to reduce the level of a
to overcome the disease within testing methods.
contaminant in drinking water.
a few weeks. However,immuno-
compromised people have more
difficulty and are at greater risk of TWSA SOURCE WATER ASSESSMENT
developing severe,life threatening
illnesses. Immuno-compromised In 2005,the Oregon Health Authority and the Department of Environmental Quality
individuals are encouraged to consult conducted a source water assessment for the aquifer storage and recovery wells and the
their doctor regarding appropriate native groundwater well serving the Tigard Water Service Area (TWSA).The purpose of
precautions to avoid infection. the assessment was to identify potential sources of direct and indirect contamination in
areas surrounding these wells.The assessment identified 50 potential contaminant sources
Cryptosporidium must ingested (natural and man-made) that may affect the water quality if managed improperly.
for it to cause disease ann d maybe
spread through means other than To view a summary of the assessment, contact Environmental Program
drinking water. Coordinator Jennifer Joe at 503-718-2599 or jennifer@tigard-or.gov.
6 1 of Tigard Water Division
Lead in the Drinking Water . . .
Are You at Risk. Q &A
If present,elevated levels of lead can cause serious health about
problems,especially for pregnant women and young children. H 0
Lead in drinking water is primarily from materials and 2
components associated with service lines and home FREQUENTLY ASKED QUESTIONS
plumbing.The TWSA is responsible for providing high-
quality drinking water,but cannot control the variety Is fluoride added to the water?
of materials used in plumbing components.When Fluoride is not added to the water.
your water has been sitting for several hours,you can You may want to consult with your
minimize the potential for lead exposure by flushing dentist about fluoride treatment to
your tap for 30 seconds to 2 minutes before using water for help prevent tooth decay,especially
drinking or cooking.If you are concerned about lead in your for young children.
drinking water,you may wish to request a free lead-in-water
test from the LeadLine.Information on lead in drinking Is our water soft or hard?
water,testing methods and steps you can take to minimize
exposure is available from the LeadLine, 503-988-4000, Our water is very soft.Most of the year
www.leadline.org or the Safe Drinking Water Hotline the hardness ranges from 3-8 parts
800-426-4791,www.epa.gov/safewater/lead. per million (ppm),or approximately
to%z a grain of hardness per
gallon.During the summer,some
WHAT THE EPA SAYS ABOUT DRINKING WATER CONTAMINANTS customers receive a blend of ground-
water from our aquifer storage and
Drinking water,including bottled water,may reasonably be expected to contain
recovery wells.The water from these
at least small amounts of some contaminants.The presence of contaminants (Ak
y
wells has a hardness of approximately
does not necessarily indicate that water poses a health risk.More information 80 ppm (about 5 grains per gallon),
about contaminants and potential health effects can be obtained by calling the which is deemed moderately hard.
Environmental Protection Agency's(EPA)Safe Drinking Water Hotline at 800-426-4791.
What is the pH of the water?
The sources of drinking water(both tap water and bottled water)include rivers,lakes,streams, The pH of Tigard's water typically
ponds,reservoirs,springs and wells.As water travels over the surface of the land or through the ranges between 7.4—8.1.Sodium
ground,it dissolves naturally occurring minerals and,in some cases,radioactive material,and hydroxide is added to the source
can pick up substances resulting from the presence of animals or from human activity. water to increase the pH level.This
Microbial contaminants,such as viruses and bacteria,which may come from wildlife or treatment helps to reduce corrosion in
septic systems. your home's plumbing system if lead
Inorganic contaminants,such as salts and metals,which can occur naturally or result from and copper are present in your pipes.
urban stormwater runoff,industrial or domestic wastewater discharges or farming.
What can I do about chlorine
Pesticides and herbicides,which may come from a variety of sources such as farming,urban taste and odor in my water?
stormwater runoff and home or business use.
The simplest way to get rid of chlorine
Organic chemical contaminants,including synthetic and volatile organic chemicals, taste and odor a to place tap water
which are byproducts of industrial processes and can also come from gas stations urban in a container and allow it to sit for
stormwater runoff and septic systems. a few hours.The taste and odor will
Radioactive contaminants,which can occur naturally. dissipate with time.
In order to ensure that tap water is safe to drink,the EPA prescribes regulations which 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.
of Tigard Water Division 1 7
Questions ,
Community Benefits
Tigard has the answers!
Lake Oswego •Tigard
Your Water Bill? Water Partnership
Utility Billing ............ 503-718-2460 0 sharing water•connecting communities
Water Quality?
..... ..........
Jennifer Joe............ 503-718-2599 CLACKWAS CO. _.:
jennifer@tigard-or.gov
TICARD
Water Conservation? --
Jennifer Joe ........... 503-718-2599 P,=
jennifer@tigard-or.gov
- LAKEOSWEGO
Backflow Prevention?
Hung Nguyen ...........503-718-2603 °'
hung@tigard-or.gov J� o
Water Emergencies? GLADSTONE
Public Works ...........503-718-2591
WEST LINN
After-hours Water Emergencies? 43
On-call Service ....... 503-639-1554 OREGON
CITY
General Inquiries?
Public Works .......... 503-718-2591
Have a question about this report? The City of Tigard currently purchases the majority of its water from the Portland Water Bureau
Contact Environmental Program (PWB).As a wholesale water customer,Tigard has no say in water quality decisions,little
Coordinator Jennifer Joe at 503-718- control over the price it pays for water,nor does it have any guarantee that adequate supplies
2599 or jennifer@tigard-or.gov. will be available in the future.Tigard's water contract with the PWB expires in 2016.
Habla Espanol? Over the last 15 years,Tigard explored many long-term water supply options.In 2008,the
Este informe contiene informaci6n city made the decision to partner with Lake Oswego to build a new water system;a system
importante acerca de su agua that will meet both communities'future water needs for decades to come.
potable.Haga que alguien to Under the Lake Oswego Tigard Water Partnership,Tigard will share in the ownership and
traduzca para usted,o hable con control of the water system.Though costly,the partnership remains the least expensive
alguien que to entienda. option to meet future needs and provide water customers with a reliable,high-quality
water supply.
Construction of several partnership projects is underway.The Tigard City Council is actively
involved in monitoring these projects with our Lake Oswego partners.For more information
about the partnership,visit www.lotigardwater.org.
cAre youI in learningmore aboutI
City of Tigard if so,the intergovernmentalBoard you to attend its monthly
meetings,held the second Wednesday 1
Tigard Public Works Building Auditorium located at 8777 SW Burnham St.,
Tigard,Oregon.
8 of Tigard Water Division