2010 Water Quality Report TIGARD
WATER
SERVI
TWSA AREA CE
Providing a clean,safe,dependablepp
to the residents of Durham,
and Tigard Water District. KN 1) 1
L Annual Water Quality Report ll� Summer 2010
v
A Year in Review: 2009
z
\'�' elcome to the summer edition of Know H2O; a quarterly newsletter for residents
/ of the Tigard Water Service Area(TWSA).This quarter's edition is designed to
provide you with a summary of TWSA's 2009 water quality data. Inside,you will
O,A Find valuable information about where your drinking water comes from,what it contains,
ti�TgPiE how it compares to the drinking water standards set by the State of Oregon and U.S.
PRWWmental Protection Agency. In addition,you will find important information on water issues
affecting the community.
Questions? For more information regarding this report,please contact Environmental Program Coordinator,
Tigard has the answers! Sally Mills at 503-718-2604 or sally@tigard-orgov.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Your Water Bill?
Utility Billing
503-718-2460 Important Information About TWSA Source
Water Quality? Water and Your Health Water Assessment
Sally Mills
sally@tigard-or.gov Some people may be more vulnerable to contaminants in In 2005,the Oregon Departments
503-718-2604 the drinking water than others. Most specifically, infants, of Human Services (DHS) and
the elderly and immuno-compromised persons such as Environmental Quality(DEQ)
Water Conservation? cancer patients undergoing chemotherapy,persons who
Jennifer Joe conducted a source water assessment
jennifer@tigard-or.gov have undergone organ transplants,persons with HIV/AIDS for the groundwater wells serving the
503-718-2599 or other immune system disorders can be TWSA.The purpose of the assessment
at a higher risk from infections.These 0 was to identify potential sources of
Backflow Prevention? -' persons should seek advice 0direct and indirect contamination in
Hung Nguyen about drinking water from areas surrounding the groundwater
hung@tigard-or.gov (� ■
503-718-2603 their health care providers. wells.The assessment identified
.v��.,
.. The Environmental 0 50 potential contaminant sources
Water Emergencies? Protection Agency(EPA) . (natural and man-made) that may
Public Works and Centers for Disease 0 affect the water quality if managed
503-718-2591 Control and Prevention improperly.
provide guidelines on the ■
Atter-hours Tisummary To view a summa� appropriate means to lessen the � o f the
Water Emergencies?
risk of infection by cryptosporidium assessment, contact Environmental
On-call Service
503-639-1554 and other microbial contaminants. 0 Program Coordinator Sally Mills at
503-718-2604 or sally@tigard-orgov.
General Inquiries? For more information call the Safe Drinking Water
Public Works Hotline at 1-800-426-4791 or visit the EPA's website ■
503-718-2591 at www.epa.gov/ow.
Tigard Water Service Area
A/zsa
Tigard Water Service Boundary 0 `•.�
Tualatin Valley Water District Tualatin`
An Important Message Valley,
BEAVERTON
r
Water
from the Environmental ri
Service
Area
Protection Agency a TIGARD ►
M i fit ell
Sources of drinking water(both tap and
bottled)include rivers,lakes,streams,
- �.a..*., ❑[b Qao fir► 3
ponds,reservoirs,springs and wells.
Tigard Water !�;
Water travels over the surface of the land —
and/or through the ground,dissolving : Service Area +.. •r
naturally occurring minerals which,
Q
in some cases,includes radioactive , UNIN-
materials and other substances resulting CORPORATED-
from the presence of animals or human a WASHINGTON
COUNTY =
s Durham Road
activity.Contaminants that might bea°atl SIN
expected in untreated water include: Beef Be°d
TY
microbial contaminants such as viruses I
and bacteria;inorganic contaminants `� s
such as salts and metals;pesticides MM,* o
and herbicides;organic chemicals TUALATIN
from industrial or petroleum use;and
radioactive contaminants.
.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Because of water's natural cycle,
drinking water,including bottled Source Information
water,may contain small amounts
of some contaminants.However,the The City of Tigard does not have Tigard also purchases water from the City
presence of contaminants does not ownership in a water supply capable of of Lake Oswego.Lake Oswego draws
necessarily indicate that the water poses meeting the current and future demands its water from the Clackamas River Basin.
a health risk.To ensure that tap water of its residents. In order to meet the Encompassing nearly 940 square miles,the
is safe to drink,the Environmental growing demand for water,Tigard basin begins in the Mt.Hood National Forest.
Protection Agency(EPA)prescribes purchases nearly 90 percent of its water Drawn from the Clackamas River,the water
regulations limiting the amount of from wholesale water providers such as is pumped through a pipeline buried beneath
certain contaminants in water provided the Portland Water Bureau (PWB). the Willamette River to the Lake Oswego
by public water systems.The EPA The PWB manages the Bull Run Treatment Plant located in West Linn.
establishes test methods and monitoring Watershed, a surface water supply, located During periods of high water demand
requirements for contaminants and in the Mount Hood National Forest. In Tigard can supplement its supply with
requires public water systems to give cases of emergency and/or high demand, water from city-owned aquifer storage
public notice in the event of a violation. the PWB also maintains groundwater and recovery wells and native
More information about wells located along the Columbia River. groundwater wells.
contaminants and potential health
effects are available from the EPA's
Safe Drinking Water Hotline at 1-800- Did you miss an issue of Know H20? You'll find back
426-4791;or visit their website at issues and plenty of great tips at:
www.epa.gov/ow.
www.ligard-or.gov/water
2 1 Tigard Water Service Area • 2010 Water Quality Report
Cryptosporidium : PPCPs: Should you
Cryptosporidium is a micro-organism(protozoan) naturally present in surface he concerned?
water supplies throughout the world.These supplies are particularly vulnerable if they
receive runoff or pollution from human or animal wastes.Since wildlife inhabits the Recent studies are generating a growing
Bull Run and Clackamas River Watersheds,the managing agencies regularly monitor concern over pharmaceuticals and
for cryptosporidium and have done so for more than ten years.Occasionally,low levels N personal care products(PPCPs)entering
of cryptosporidium have been found.New national standards have been established to N water supplies.PPCPs include human and
further reduce the risks of illness from cryptosporidium.Symptoms of infection include veterinary drugs(prescription or over-the-
nausea,abdominal cramps and diarrhea.Most healthy individuals are able to overcome counter) and consumer products such as
the disease within a few weeks.However,immuno-compromised people have more cosmetics,fragrances,lotions,sunscreens,
difficulty and are at greater risk of developing severe,life threatening illnesses. Immuno- and house cleaning products.To address
compromised individuals are encouraged to consult their doctor regarding appropriate citizen concerns,the Portland Water Bureau
precautions to avoid infection.Cryptosporidium must be ingested for it to cause disease, sampled for PPCPs collected from treated
and may be spread through means other than drinking water. and untreated water from the Bull Run
Watershed and Columbia South Shore Well
■ Field.Ibuprofen was the only PPCP detected.
Lead in the Drinlcing Water... Are You at Rislc? Found only in groundwater samples
■ collected prior to treatment,Ibuprofen was
Elevated levels of lead can cause serious health problems,especially for pregnant women NOT detected in samples collected after
and young children.In the Tigard Water Service Area(TWSA),lead enters drinking water groundwater treatment;nor was it detected
primarily through materials and components associated with a home's water service line in samples collected from the watershed.
and/or plumbing.For example,lead can leach into drinking water from the corrosion,or
wearing away,of household plumbing components like brass and chrome-plated faucets and •
lead-based solder used to join copper pipe.
Lead levels in drinking water vary depending on the plumbing components used and the • Getting the Most Out
amount of time water is in contact with those components.Lead is most often found in of Your Water Bill
drinking water that has been sitting in household plumbing for several hours,such
as in the morning,or after returning from work or school.You can Online Bill Pay:Paying your water
minimize the potential for lead exposure by flushing your tap bill can be as simple as turning on your
for 30 seconds to 2 minutes before using water for drinking, computer without ever leaving your home!
cooking,or preparing baby formula.You may also want to As a TWSA customer,you have access to
consider installing a water filter and/or low-lead faucets. online billing,but did you know you can
Although the City of Tigard is responsible for providing high view your past usage and compare it with
quality drinking water to customers,it cannot control the the current amount of water you consume?
variety of materials used in plumbing components beyond This can give you all sorts of information
the water meter.It does,however,provide water which has such as how much you use for irrigation by
undergone a treatment process to increase the pH which comparing winter vs.summer usage,or if
helps to reduce the corrosion of plumbing components. you have a leak due to an unusually high
- amount of water use.
To learn more about lead exposure contact the LeadLine at 503-988-4000 or ■
visit www.leadline.org. For more information on lead in drinking water, testing ETo sign up for online bill pay go
methods, and steps you can take to minimize exposure, contact the Safe Drinking E to www.tigard-or.gov and click
Water Hotline at 1-800-426-4791 or visit www.epa.gov/safewater/lead. on Utility Payments.
Lead and Copper Sampling at High Risk Residential Water Taps
CONTAMINANT 90th Percentile MCL AL TYPICAL SOURCE
Copper(ppm) 0.34 1.30 AL exceeded if 10%of more of homes Corrosion of household and commercial plumbing
tested have levels above 1.30 ppm
Lead(ppb) 9.0 15.0 AL exceeded if 10%of more of homes Corrosion of household and commercial plumbing
tested have levels above 15.0 ppb
2010 Water Quality Report • Tigard Water Service Area 1 3
G 0
9
/ / 1 / I 1Oswego and TigaForm Water Partnership
------,------------------- --------- --------------
CLACKAMAS CO.
. .
In.August 2008,the cities of Tigard and Lake Oswego formally endorsed a 217
partnership agreement for sharing drinking water resources and costs.Residents
of Tigard's water service area need a secure,dependable water source.Lake 43
Oswego's water supply system is near capacity and key facilities need expansion and BARD
upgrades.Both cities want to keep water affordable for their customers and sharing WALLIGA
N MOUNTAIN CITY PARK
the cost of new infrastructure to serve both communities does that. ---- ---- ----- RESERVOIR
The Lake Oswego Tigard Water Partnership expands Lake Oswego's existing BONITA
PUMP
drinking water infrastructure so that it can serve both communities.Lake STATION
Oswego currently withdraws water from the Clackamas River in Gladstone as
it has done for about 40 years.This water travels through a large pipe under _ Clackamas River provides high quality water for the
the Willamette River to the Lake Oswego Water Treatment Plant located in West Lake Oswego Tigard Water Partnership.
Linn where it is treated to safe drinking water standards.The treated water is LAKE OSWEGO
then pumped through another large pipeline to Lake Oswego and the Waluga
Reservoir near the city's western boundary.From there,water goes through pipes
to Lake Oswego customers and to Tigard's Bonita Road Pump Station.Tigard f 43
currently uses water from Lake Oswego only during the summer months.
Project Schedule Q`P LAKE oSWEGO
�J WATER
By the end of 2010,both communities will have committed to a plan for ----- TREATMENT
upgrades and expansions to Lake Oswego's existing drinking water PANT
-= ___
facilities so that it can serve both cities.Tigard City Council and EXISTING FACILITIES Lake Oswego -Tigard = �os
UNTREATED WATER PIPELINE
Intergovernmental Water Board meetings are planned through the fall to = TREATED WATER PIPELINE Water Partnership GLADSTONL
make important decisions about the project.Visit www.lotigardwater.org a WATER FACILITY - 0sharing water connecting communities
LACAMAS
to follow the process and learn more about upcoming meetings. ■ PARK LIER INTAKE
NTK
AKE
Anticipated Duration National and regional experts in water treatment and public health Clackamas River Provides WEST LI NN 99E
Project Definition December 2009—December 2010 are teaming up with staff and Citizen Sounding Board members from High Quality Water
Pre-Design and Permitting July 2010—February 2012 Tigard and Lake Oswego to evaluate different treatment methods. The Lake Oswego Tigard Water Partnership will 43
Design March 2011 —October 2013 The water treatment decision team will participate in workshops over benefit from access to a high quality water source:
Construction March 2012–June 2016 a four-month period,March June,2010.A subcommittee of policy the Clackamas River.The 950-square mile OREGON
makers from Tigard and Lake Oswego will recommend the best Clackamas watershed provides drinking water for 213 CITY
Water Treatment Decision treatment option to both City Councils for their consideration in July the cities of Estacada,Gladstone,Lake Oswego,
Selecting the best drinking water treatment method is the first and 2010.Visit www.lotigardwater.org to follow the process. Milwaukie,Damascus,Happy Valley,Oregon
City,and West Linn and several water service
most important decision in Partnership planning.The upgraded districts.The Clackamas River is one of Oregon's high-quality
treatment plant will be in service for up to 50 years and represents a EXPERT PANEL
significant investment for both communities. A five member"expert panel"is being convened to advise the drinking water sources and is protected from new discharges througha state law called the Three Basin Rule. To learn more about the Clackamas River Watershed go to
water treatment decision.Panel members include: www.clackamasriver.org
Under the water partnership agreement,Lake Oswego's existing water ► Pete Kreft,P.E.,MWH The Three Basin Rule applies to the Clackamas River and two other
treatment plant will be upgraded to serve both communities' ► Matthew Marshall,P.E.,Carollo Engineers rivers in the region—the North Santiam River(Salem's drinking Stay Informed!
needs into the future.The upgraded facility will use water treatment ► Jeff Neeman,P.E.,Black and Veatch water source) and the McKenzie River(Eugene's source).The rule For more information and to sign up for email updates visit www.
technology that produces safe,pleasant tasting water that meets or ► Eva Nieminski,PhD,Utah Department of Environmental recognizes the high quality of the three rivers,and prohibits any lotigardwater.org.or contact:Dennis Koellermeier,City of Tigard
exceeds all drinking water regulations and can be adapted to meet Quality and Utah State University
future regulations.
► Lee Odell,P.E.,CH2M Hill new surface water discharges (e.g.,wastewater treatment plants). Public Works Director,Bennis@tgard-or.gov or 503-718-2596.
4 1 Tigard Water Service Area • 2010 Water Quality Report 2010 Water Quality Report • Tigard Water Service Area 1 5
Information on Detected Definitions
Contaminants Action Level (AL):The concentration
In addition to the over 200 regulated and unregulated contaminants of a contaminant,which, if exceeded,
tested by our wholesale water providers,Tigard monitors water quality triggers treatment, or other requirements
through water samples collected within the TWSA water distribution system.Analysis results that a water system must follow.
indicated Tigard's drinking water continues to meet and/or exceed all Maximum Contaminant Level (MCL):
federal and state drinking water standards.Below is a list of contaminants detected The highest level of a contaminant that is
in Tigard's water supply during 2009. allowed in drinking water. MCLs are set
Federal standards regulate contaminants to protect drinking water quality These standards as close to the MCLGs as feasible using
limit the levels of contaminants that are known to occur in water and can adversely affect the best available treatment technology.
public health.The levels of contaminants detected in Tigard's drinking water are far below the
maximum contaminant levels(MCL)set by the U.S.EPA and as such,do not pose a significant Maximum Contaminant Level Goal
(MCLG):The level of contaminant in
health risk to consumers.
drinking water below which there is no
Arsenic,Barium,Fluoride and Lead are naturally occurring elements that can dissolve known or expected risk to health. MCLGs
into the groundwater supply. allow for a margin of safety.
Chlorine is added to maintain disinfection requirements throughout the water distribution system. Non-detected (ND): Not detected at
Cyanide typically enters water as a naturally occurring element that dissolves into the or above the MDL(Method Detection
groundwater supply.Further investigation by the Portland Water Bureau attributed the detected Limit).
cyanide to algae and plants naturally found in the Bull Run Watershed.
Not Applicable (NA): Not applicable for
Disinfection By-Products (Haloacetic Acids and Total Trihalomethanes)are the specified contaminant.
formed through chemical reactions between chlorine and naturally occurring organic matter
in the water.The disinfection process is carefully controlled to remain effective while keeping Nephelometric Turbidity Units
by-product levels at a minimum. (NTUs):Turbidity is a measure of how
clear the water looks.Turbidity can
Nitrates and Nitrites are formed through the erosion of natural deposits,agricultural interfere with disinfection and provide a
activity,and leaching of septic tanks.
medium for microbial growth.
Diquat is an organic solid of colorless or yellow crystals that turns dark red or brown in a water
or
solution.It is most widely used as a herbicide to control both crop and aquatic weeds. Parts per million(ppm)
Milligrams per liter(mg/L/L):A unit
Gross Beta are particles emitted from the decay of radioactive mineral deposits,both natural measurement describing the level of
and man-made. detected contaminants that is one part
Unregulated water quality standards are established as guidelines to assist public water systems by weight of analyte to 1 million parts by
in managing drinking water for aesthetic considerations such as taste,color and odor.These weight of the water sample.
contaminants do not present a risk to human health. Parts per billion (ppb) or
Radon is a naturally occurring,radioactive gas that cannot be seen,tasted or smelled.Radon Mircograms per liter(pg/L):A unit
has not been detected in Tigard's purchased water supplies but has been detected at varying measurement describing the level of
levels in Tigard's aquifer storage and recovery(ASR)wells and native groundwater well.For more detected contaminants that is one part
information about Radon,call the EPA's Radon Hotline at 1-800-SOS-RADON or visitwwwepa. by weight of analyte to 1 billion parts by
gov/safewater/radon/html. weight of the water sample.
Sodium is formed through the erosion of natural deposits,added to water during treatment, Picocurries per Liter(pCi/1):A
and is an essential nutrient. standard measurement of radioactivity
Sulfate is formed through the erosion of natural deposits and at high levels can contribute to a in water
salty taste and/or odor in water. Treatment Technique(M:A required
For a complete list of chemicals and compounds tested for on a regular basis, visit the City process intended to reduce the level of a
ofTigardswebsiteatwww.tigard-or.gov/water. contaminant in drinking water.
6 1 Tigard Water Service Area • 2010 Water Quality Report
2009 Water Quality Analysis Results
CONTAMINANT MCL MCLG TIGARD ANALYSIS RESULTS TYPICAL SOURCE
LOW F RANGE 4 HIGH
MICROBIOLOGICALS
Fecal coliform 0 0 1 sample had 6 bacterial Human and animal fecal waste
and E.coli colonies(100%of samples
had 20 or fewer bacterial
colonies per 100 milliliters
of water)
Giardia TT Required:Disinfection NA 1 sample of 50 liters had Animal waste
to inactive 99.9%of cysts 3 Giardia cysts
Total coliform bacteria Must not detect coliform 0%of samples 1 of 61 samples in October Naturally present in the
bacteria in more than 5% with detectable had detectable coliform environment
of samples/month coliform bacteria (<2%)
Turbidity(NTU) 5 NA 0.10 3.80 Soil erosion
Arsenic(ppb) 10 0 NO 3.00 Erosion of natural deposits in
groundwater aquifers
Barium(ppm) 2 2 NO 0.01 Erosion of natural deposits in
groundwater aquifers
Cyanide(ppb) 200 200 10 46.0 Produced by algae and plants
found naturally in watersheds
Fluoride(ppm) 4 4 ND 0.14 Water treatment additive;erosion
of natural deposits
Lead(ppb) NA' 0 ND 5.00 Erosion of natural deposits
Nitrate(ppm) 10 10 NO 1.40 Erosion of natural deposits; runoff
from fertilizer; leaching from septic
tanks and sewage
Nitrite(ppm) 1 1 ND 0.06 Erosion of natural deposits; runoff
from fertilizer; leaching from septic
tanks and sewage
SYNTHETIC ORGANICS
Diquat(ppb) 20 20 NO 0.40 Runoff from herbicide use
RADIOLOGICALS
Gross Beta(pCi/1) NAI 0 3.40 3.40 Decay of natural deposits
DISINFECTION ii
Chlorine(ppm) 4 4 0.01 2.15 Water additive used to control
microbes
Haloacetic Acids(ppb) 60 NA ND 41.70 By-product of drinking water
disinfection
Total 80 NA 1.60 46.40 By-product of drinking water
Trihalomethanes(ppb) disinfection
UNREGULATED AND SECONDARY
Ibuprofen(ppb) No Standard No Standard NO 3.50 Source unknown,possible
percolation into groundwater
aquifer'
Radon(pCi/1) No Standard No Standard 33.00 356 Found in natural aquifer deposits
Sodium(ppm) 20 20 1.47 8.70 Erosion of natural deposits;water
treatment additive
Sulfate(ppm) 250 250 NO 2.91 Naturally occurring substance in
drinking water
There is no MCL for lead at the entry point to the distribution system.Lead is regulated at customers'taps.See"Lead in Drinking Water...Are You at Risk?"on page 3 for more
information.
2 Community water systems monitor for gross beta at a screening level of 50 pCi/l.The screening level is not health based but rather a level at which additional and increased
monitoring would be required.Those systems detecting gross betas at or above the screening level are required to meet an MCL of 4 millirems per year.
3 See"PPCPs:Should you be concerned?"on page 3 for more information.
2010 Water Quality Report • Tigard Water Service Area 1 7
0Lake Oswego -Tigard IWB Meeting
Water Partnership
� sharing water connecting communities
Announcement
' OPEN HU 5 U f The City of Tigard is responsible for
providing a clean,safe,dependable supply
In August 2008, the cities of Lake Oswego and of drinking water to over 56,000 residents
Tigard formally endorsed a partnership for located in Tigard Water service Area
— sharing drinking water resources and costs. (TWSA).The service area includes the
Learn about the partnership, recommended 0 cities of Durham,King City,two-thirds of
system upgrades and share your thoughts at this Tigard and Tigard Water District.
fun and informative open house. Municipalities within the TWSA are
represented by the Intergovernmental
JUNE 24, 2010
Water Board(IWB).The Board advises
the Tigard City Council on water-related
Doors open 5 to 8 p.m. matters.If you are interested in learning
Presentations at 6 and 7 p.m. more about your water,the 1WB invites
you to attend their monthly meetings.
West End Building 4101 Kruse Way, Lake Oswego Meetings are scheduled for the second
Wednesday of each month at 5:30 pm
For information, contact jane Heisler, Communications Director City in the Tigard Public Works Building
— of Lake Oswego jheisler@ci.oswego.or.us 503- 697-6502 or visit the Auditorium located at 8777 SW Burnham
project website at www.LoTigardWater.org, Street in Tigard,Oregon.
City Of Tigard PRESRT STD
PUBLIC WORKS DEPT. U.S.POSTAGE a
PAID ■ I
' 13125 SW Hall Blvd. PORTLAND,OR I I I I
Tigard, OR 97223 PERMIT#1350
* * * * * * ECRWSS The LeadLine, staffed by Oregon-
■OSTAL CUSTOMER licensed Lead Risk Assessors,
x�o offers a variety of public services
'_� pYeat in Review:2009
• including:
/ FREE lead-in-water testing
/ FREE childhood blood lead
INSIDE: A special annual edition ■
of your Know H2O newsletter level testing
with 2009 water quality data. / Lead poisoning prevention
- workshops
/ Programs to reduce hazards in
■ eligible homes
Have a question about this report? •
Contact Environmental Program Coordinator Sally Mills at 503-718-2604 or sally@tigard-or.gov. To take advantage of theseprograms
■ and for additional information
zHabla Espanol? on how to reduce your exposure
Este informe contiene informaci6n muy importante sobre su agua potable.Traduzcalo o hable con to all sources of lead, contact the
alguien que to entienda Bien. LeadLine at 503-988-4000 or visit
® This report was printed on recycled paper with environmentally friendly inks.Please www.leadline.org
remember to recycle.
8 1 Tigard Water Service Area • 2010 Water Quality Report