2008 Water Quality Report Tigard Water
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2008 Water Quality Report
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"Water is the lifeblood of our bodies, our economy, our nation and our well-being."
—Stephen Johnson,EPA ADMINISTRATOR
The Purpose Decision Time Approaches
of this Report... •
This report is designed to present a ' for Future Water Sources
summary of Tigard's 2007 water quality •
data.Additional information is provided to
inform,educate and update consumers he Tigard Water Service Area (TWSA) • Lake Oswego Expansion
on water issues affecting the community. includes the cities of Durham, &Water Partnership
For more information,contact the City of King City, two-thirds of Tigard and Water Source:Clackamas River
Tigard at 503-639-4171 or visit the city's unincorporated areas to the south and west
web site at www.tigard-or.gov/water. of Tigard. The City of Tigard is the water •Tualatin Basin Water Supply Project - -
provider for the TWSA and entities within (Also known as the Hagg Lake Dam
The City of Tigard is responsible for this partnership are represented by the raise project) -
providing a clean,safe,dependable Intergovernmental Water Board (IWB). Water Source:Trask and Tualatin Rivers
supply of drinking water to nearly 56,000 •
residents located in Tigard Water Service The TWSA's peak water demand can reach •Willamette River Treatment&
Area.The service area includes the cities
13 million gallons a day,but as our population Transmission Improvement Project
of Durham,King City,two-thirds of Tigard continues to increase,that number is expected Water Source:Willamette River
and the unincorporated areas to the south to reach 20 million gallons a day by the year
and west of Tigard. 2040.Currently,the TWSA receives its water • Portland Water Purchase Agreement
from several sources,but these sources aren't Water Source:Bull Run Watershed
Are you interested in learning more capable of meeting our growing demand
about Tigard's water issues?If so,the for water. These options have the
Intergovernmental Water Board invites ability to deliver high-quality, Over the next six months,the IWB and the
you to attend their month) meetings.The As a result,the City of Tigard, All o these safe,drinking water that
y y g . Tigard City Council will decide which option(s)
Board consists of representatives from along with IWB partners options have meets or exceeds all federal should be pursued and which option(s),if any,
the municipalities within the Tigard Water ; Durham,King City and the and state drinking water should be eliminated."It is time to fi sh or cut
Tigard Water District,will the ability standards.Yet,each option
Service Area.Meetings are scheduled for bait, proclaimed Tigard Mayor Craig Dirksen.
the second Wednesday of each month soon be faced with a series to deliver also comes with its own set
at 5:30 p.m.in the Tigard Public Works of decisions regarding future high-quality, of challenges,opportunities, To learn more about water supply options,the
Building Auditorium located at 8777 : drinking water source(s). and constraints,including a IWB encourages citizens to attend its meetings
These important decisions Safe, drinking caveat that the Willamette
SW Burnham Street in Tigard,Oregon. p held on the second Wednesday of each
will chart a course for our water... River source would require month at 5:30 p.m.in the Tigard Public Works
For more information contact the City future water supply and will the approval of Tigard voters. Building,8777 SW Burnham Street,Tigard,
of Tigard at 503-639-4171. ; affect water customers for Costs to develop,expand,or Oregon,or contact Tigard Public
• decades to come.The IWB is currently studying improve infrastructure will likely cost tens of Works Director Dennis Koellermeier at
the following long-term water supply options: millions of dollars. 503-718-2596 or dennis@tigard-or.gov.
2 1 Tigard Water Service Area 2008 Water Quality Report
Source Information Tigard Water Service Area
' Your Water Dollar at Work!
Water is an essential part of life;the
The City of Tigard does not have ownership r : supply of fresh,clean water is a basic
in a water supply capable of meeting the _ Tigard Water Service Boundary Taylor's FerryRoa human need. Water is also a simple
16 Acurrent and future demands of its residents. = Tualatin valley water District convenience we have come to expect with
In order to meet the growing demand for PO"m Tigard Water Service in TVWD the turn of a tap.
water,Tigard purchases nearly 90 percent Locust St.- '
of its water from wholesale water providers BEAVERTON ti yhy Repairs&
2>> • Maintenance Contract and
North Dakota Street
such as the Portland Water Bureau(PWB). Dov rfaffl a st.ea°m z% Interfund Laboratory
, Transfers** �Services 8%
The PWB manages the Bull Run Watershed, Fey' Q 9�d 22%
a a �
a surface water supply,located in the Mount M c� Other*5%
Hood National Forest. In cases of emergency r,.1 walnutstt 9`�S�teet Hu
and/or high demand,the PWB also maintains
groundwater wells located along themG� alatin a s18°
Columbia River. Gaarde Street R McDonald Street Purchases
alley
Bonita Road
ater
Bull Mountain Ro d Tigard Water istrict
In addition Tigard purchases water from the LININ- ILLerved by
G06PORATEO- Service Area d Equipment
City of Lake Oswego.Lake Oswego draws WASHINGTON m a f Tigard z/
ig &vehicles
COUNTY oa
its water supply from the Clackamas River KING Durham Road 404
Basin.Encompassing nearly 940 square miles, CITY Although annual rainfall and snow pack
the basin begins in the Mount Hood National replenish the region's water supplies,
Forest.Drawn from the Clackamas River the Q
m delivering water from source to tap
water is pumped through a pipeline buried o requires a well maintained distribution
beneath the Willamette River to the Lake Tuau►nN system operated by trained staff.
Oswego Treatment Plant located in West Linn. Revenue from water rates finances the
cost of providing the Tigard Water Service
During periods of high water demand Tigard Area with nearly 2.2 billion gallons of
can supplement its supply with water from water each year.Water rates not only fund
city-owned aquifer storage and recovery water operations and maintenance,but
(ASR)wells and native groundwater wells. For more information regarding Tigard's current water sources, also pay for the cost of distribution system
Tigard can also purchase water from the Joint visit the Water Division's web site at improvements,such as new reservoirs,
Water Commission(JWC).This surface : piping,and the development of alternative
water supply draws water from the Trask and www.tigard-or.gov/water water sources.
Tualatin Rivers Watershed.Water from the or contact the Water Quality Program Coordinator •
JWC is delivered via the City of Beaverton's Sally Mills at 503-718-2604 or sally@tigard-or.gov. 'Other represents an array of expenses including
water distribution system,making it Tigard's public outreach&education,professional
only fl uoridated supply. _ : development,rent,utilities,fuel,and insurance.
• **Interfund Transfers represent overhead costs for
city services and support programs.
2008 Water Quality Report • Tigard Water Service Area I 3 •
0 Is there fluoride in my tap water? I What can I do about chlorine
ANSWER:It depends.During peak summer Frequentlytaste and odor in my water?
months,the Tigard Water Service Area receives / ANSWER:The simplest way to get rid of chlorine
a small portion of its water from the City of Ytaste and odor is to place tap water in a
Beaverton.Beaverton fluoridates its water container and allow it to sit for a few hours.
at a concentration of 0.9 parts per million or With time,the chlorine dissipates and the taste
milligrams per liter.This means certain areas and odor will be gone.
of Tigard receive fluoridated water during the systems are actually more stringent than or until water clears.This allows the brown
summer months. those for bottled water producers.Consuming water to work its way through your household Acow,
bottled water is a personal preference. plumbing.If the water does not clear,wait an What is the water pressure at
However,if you are drinking bottled water for hour or so and try again.In the interim,take my house?
During the late summer and fall,I health reasons,we suggest you thoroughly the following precautions: ANSWER:Most homes receive water at a
notice a slight discoloration in the water. research the product you are using to ensure pressure of 40-80 pounds per square inch
Is this normal? Is it safe to drink? • Avoid using the water.
it meets your specific needs. By not taking water from the tap or running (psi),but the minimum standard is 20 psi.Low
ANSWER:The Tigard Water Service Area appliances that use water(dishwashers water pressure is often a symptom of restricted
receives the majority of its water from the City I just turned on my faucet and and washing machines),you can limit the water flow.This is usually the result of build-up
of Portland's Bull Run Watershed.Two large the water is brown!What happened amount of brown water that enters your in older,galvanized,household plumbing.
lakes serve as reservoirs for this watershed.
and what should I do? household plumbing.
Discolored water can occur,especially during
ANSWER:When the water from your faucet • Don't do laund Where can I get my water tested?
late summer and fall,when water levels in these ry.
lakes are lower and streams flowing into them suddenly turns brown,it is an indicator of The brown water can sometimes stain ANSWER:For a fee,private laboratories will test
carry more sediment and organic material.This a disturbance in the water system.Tigard fabrics.Wait until water runs clear at the tap your tap water.Not all labs are certified to test
results in water that is sometimes described as purchases the majority of its water from before using your washing machine,and for all contaminants.Visit www.tigard-or.gov/
cloudy,tinted,or discolored.Such discoloration the City of Portland.The water supplied by wash a load of dark clothes first. waterlabs for a list of local laboratories.
is a normal,seasonal variation in an unfiltered Portland is not filtered,so any sediment
tid ithe itransported into If brown water does not clear within four
contained waters trans
water supply like the Bull Run. p hours,contact the City of Tigard.
our water system and ultimately settles at
The discoloration only affects the appearance the bottom of water lines.Disturbances in Want to know if you are receiving or
of the water; it does not affect the taste or the the water system,caused by hydrant use, The brown water only affects the appearance will receive fluoridated water?Have
quality.The water supply is tested regularly main breaks,or construction,can stir up the of the water; it does not affect water quality. you had brown tap water for more
and continues to meet all state and federal sediment,causing the water to turn brown. There is no health hazard associated with the than four hours?Want to learn more
drinking water standards. Depending on the severity and location of the brown water. about water quality and testing?
disturbance,brown water usually dissipates For answers to these questions
If Is bottled water'safer'than tap? within four hours. A Is my water is hard or soft9 and more,please contact
ANSWER:The safety of bottled water depends If your water is brown,run the cold water taps ANSWER:Tigard's water is soft with a typical Water Quality Program Coordinator
Sally Mills at 503-718-2604 or
on its source and the treatment process. throughout your home(bathroom sinks and hardness ranging from one-third to one-half sally Mills at 503-7
Water quality standards for public water tubs,kitchen faucets,etc.)for 5 to 10 minutes grains of hardness per gallon.
4 1 Tigard Water Service Area • 2008 Water Quality Report
T�
The ystery of the Missing Water ; Professionalism Respect Integrity Dedication Enthusiasm- $
Did you know that some water is inevitably ,
"lost"as it fl ows through the water distribution
y
system?This missing,or unaccounted-for 1 -4 &` .I
r
6
water typically disappears through leaks in "i .5 `4 �
underground pipes and inaccurate water # b d ;
meters that under-record customer usage. }�s ' •
Based on a national average,as much as We're serious about providing our customers with the best service possible.
10 to 15 percent of the water generated or A few of you wrote to let us know how we're measuring up:
purchased simply disappears within the water Performing annual meter testing of •
system. Many water utilities across the nation large water customers. The crew knew what they were Steve was very nice, very
are well above this average.To see how the Every year the City tests the water meter ; doing and overcame a bad situation professional, and exceptionally
Tigard Water Service area measures up,the accuracy of more than 40 service in an area that was dif cult to knowledgeable in his work.
City of Tigard conducts an annual water audit. accounts that use large volumes of water. ; access.Eric,Rob and the crew did TWSA Customer, August 2006
From 2003 to 2007,Tigard's unaccounted- By focusing resources on these customer a terri c job.
for water averaged accounts,the City is able to ; TWSA Customer,February 2006 Herb was very courteous,
4.5 percent,well below ensure that the largest water hard-working, and kept us updated
the national average. Tigard's users are being accurately ; I appreciate the calls and follow during the repair. Our family was
unaccounted- and fairly charged for the ; up on the weed problem at the water thrilled to have the repair done
The City of Tigard has achieved water they use.Water meters reservoir bordering Bull Mountain so quickly.
this low percentage b : ,for water not registering within certain
p g y g 9 ; Road. We were surprised and TWSA Customer, September 2006
• Replacing water lines averaged accuracy standards are delighted when we returned home to
that are prone to 4.5%, well either repaired or replaced. nd you and your crew had nished We were very impressed by Mr.
leakage. below the the work in time for the special 4th Nissen's courtesy and helpfulness.
Based upon the age and The City of Tigard is doing ; of July weekend. It is a great pleasure to know that
type of pipe,several water national all it can to be a good water ; TWSA Customer,July 2006 our city employees are willing to go
lines were replaced in average. I steward.Won't you join above and beyond the scope of their
2005 and there was a us by being a good water ; Your staff member was a pleasure jobs to help the taxpayers.Please
dramatic reduction in steward too?You can start to work with.Not only does she give Mr.Nissen our heartfelt thanks.
unaccounted-for water.The City continues by checking out the water conservation ; go the extra mile but even under He should be recognized for his
to identify,inspect,and replace or repair information on the following pages,and by pressure she stays right on task. outstanding work ethic.
suspect water lines. visiting www.tigard-or.gov/water. ; TWSA Customer,October 2006 TWSA Customer,September 2006
2008 Wates Quality Report • Tigard Wates Service Area 1 5
wate rva
r conse tioll 1 Ole 0 0
Tips, kits and freebies ohm ! Save some money while you help save valuable resources.
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OL
FREE CONSERVATION ITEMS
•
YOU Save a Little,WE Save a Lot The City of Tigard would like to help you save money Outdoor Watering:
and water b offering the following kits: t 'h
� ith an av age Even simple changes can make a difference! y ff g f g n Inch d
t.ann l rai it Water Se e
/ of over three�feet � � Free Water Conservation Kits Outdoor kit includes: Did you know residents in the � 3. Use the following chart and locate your
year,you might wonder If everyone in the Tigard Water an encourage water wise practices both inside • Low flow hose nozzle Tigard Water Service Area use tw average water depth number.
9 p The WaterSense Label
P why we neeklo, c -' and outside the home,Tigard Water Service Area • Rain gauge ti
d�'- � Service Area saved just 10 gallons of to three times more water in the ,�.�. Do you recognize the Energy Star
residents can request a FREE conservation kit • Water wise wildflower seeds AVERAGE WATER TOTAL TIME
ser a water ut wha you consider water a day,together we would save: summer than at any other time of label?Shoppers typically seek out this
(one per household). • Informational brochures on DEPTH AFTER NEEDED TO WATER
tha the arm nt of water in our the year?Outdoor water use,and Z logo when looking to invest in energy
selecting a landscape contractor, 71- 15 MINUTES 1 INCH PER WEEK
wat shed ains the same,,w • 573,000 gallons per day! more specifically,lawn irrigation, v efficient appliances.While this is great
' F Indoor kit includes: maintaining a healthy lawn, ! 1/8 inch 120 minutes
our ea o�r latiod,'hontinues to • 4 million gallons per week! is the main culprit for this for lowering energy consumption,what
IV row, onservation makes se. • i • Shower timer and more. 1/4 inch 60 minutes
sii 17.2 million gallons per month. sizeable increase.Coincidently, can consumers look for when they want
4 • The Earth°Massage 1/2 inch 30 minutes
• 208.7 million gallons per year!! n =�4=" - over-watering may actually be to buy water efficient devices?The
' Shower head ��a���T� 3/4 inch 20 minutes
y�all needQ use water wisely to: ' hazardous to your lawn's health. answer is WaterSense,the new face of
'r",
Teflon tape R. 1 inch 15 minutes
%make sure we have'water when we need it. By making some simple changes,you can On average a lawn only needs water efficient products.
• reduce the cost and impact of developing easily reduce your water use. • Bathroom faucet aerator about one inch of water a week.
new water supplies. Outdoor Conservation Tips: • Kitchen faucet aerator „ 4. Set your watering schedule.We WaterSense,a partnership program
• Leak detection tablets ,
• leave more water in lakes and rivers for fish Indoor Conservation Tips: If it doesn't grow,don't water it— Dont know when you ve recommend watering 2 times per week, sponsored by the U.S.Environmental
and recreation. • Take a ower shower—Cut our Make sures sprinklers are pointed at our • Informational brochures ,:;r watered one inch?Follow either before 10 a.m.or after 6 .m.when Protection Agency,is making it easier
p Y p p Y _ _ p g Y, g
10-minute shower to 5 minutes,save lawn and not the sidewalk or driveway. these simple steps to a green lawn temperatures are cooler. to find and select water efficient
Does conservation really work? 12.5 gallons per shower. • Don't let your money vanish into and lower water bills: products like toilets,faucet aerators
In 2007 the Tigard Water Service Area's • Brush up on conservation—Turn the thin air—Water your lawn or garden Special considerations: and shower heads.Generally speaking,
o ulation grew b an estimated 653 water off when brushing our teeth and/ in the earl morning or late evening to Water Smart Landscape Reimbursement Program 1. Place watering gauges at 2 different During hot,dr spells you may need to a WaterSense product will be about
p p g Y 9Y Y 9 9 gg 9 D g Y A Y Y
residents.Despite this growth,the amount of or shaving.You'll save 5 gallons a day. combat the effects of evaporation. Tigard's new reimbursement program takes effect July 1.Water customers can receive up to a$50 locations within your sprinkler's spray increase your total weekly watering time. 20 percent more water efficient than a
credit on their water bill for purchasing up to two of the following products:
water residents consumed actually decreased • Don't be a drip—Repair leaky fixtures. • Does your lawn need a life vest?— range.Then run your sprinkler for 15 • If the water doesn't penetrate the soil, comparable non-WaterSense product.
from an estimated 88 gallons per person per One drip per second can waste up to Avoid applying water at a faster rate than minutes and turn it off. your lawn may need to be aerated or In addition WaterSense products must
day to an estimated 84 gallons per person per 2,400 gallons a year! it can soak into the soil.If water puddles • Rain sensor/switch for irrigation systems • Drip irrigation system thatched. work as well as or better than their less
day.The total amount saved in one year equals • Fill 'er up—Save water by only running or runs off your lawn when you water, • Pressure regulator for irrigation systems • Hose timer 2. Find the average amount of water(in efficient counterparts.
3.2-million,8-ounce glasses of water. dish and clothes washers when full. divide your watering time in half. inches)collected in your gauges.To do To help kick off a one-inch-per-week watering
Full eligibility requirements and applications are available at the Tigard Public Library and the Tigard
• Don't drown the trash—Using the toilet • Get a workout—Use a broom to clean Public Works Building,or online at www.tigard-or.gov/water. this,measure the amount of water in each schedule,contact us and we will send you a For more information on WaterSense,
Keep reading to learn more about your as a trash can waste up to 5 gallons driveways and sidewalks instead of gauge.Add these amounts together and set of watering gauges free of charge. visit www.epa.gov/WaterSense.
water and what you can do to conserve it. a flush. your hose. TO Learn More About Conservation Or to Request Free Items: divide by 2.
Contact Tigard Water Conservation Program Coordinator
6 1 Tigard Water Service Area • 2008 Water Quality Report Jennifer Joe at 503-718-2599 or jennifer@tigard-or.gov. 2008 Water Quality Report • Tigard Water Service Area 1 7
The Garden Hose Around Your Home I Tips to help keep you — and your neighbors — safe
...Enemy of Safe
Drinking Water?
Keep Fire Hydrants & and other obstacles.Residents are also asked water meters.PIM
;
Water Meters Accessible to maintain a clear,direct path from the street check to see that♦
Many water-related activities can pose to the meter box.A minimum clearance of three water meter and
a real risk to our drinking water supply.
• Residents of the Tigard Water Service Area feet is required around fire hydrants to allow fire neighborhood
Consider this scenario: are asked to help ensure there is easy access personnel to connect hoses and operate hydrant fi re hydrant are
• to fi re hydrants and water meters located on valves.A minimum clearance of two feet is accessible to —
You are washing your car and your garden their property.In the event of a fi re,it is crucial required around the water meter box. your service
hose is submerged in a bucket of soapy that emergency responders are able to identify providers.
water.A few blocks away,a water line and access fi re hydrants.Easy access to your Even low or well-maintained landscaping is not
breaks and the water pressure is lowered water meter enables city staff to perform recommended in clearance areas.If a meter For more informant
to the point that a v� repairs,provide routine maintenance,and read or hydrant requires maintenance or repair,any contact Tigard W=
is created in the waw meters in a quick and efficient manner. plantings in the clearance area will likely be Operations Supe=
disturbed or destroyed. Sam Morrison atl
lines.As a result,the
soapy water in your Many hydrants and water meters throughout the 503-718-2600 M
bucket is drawn community are obscured or are diffi cult to get Property owners are responsible for samm@tigard-o=
back through your to because of overgrown vegetation,fencing, maintaining the area around hydrants and
plumbing into the
water distribution
system.You've just Are You Required to Have a potentially contaminated water from being working properly,state law requires annual
contaminated the Back ow Prevention Device? drawn back into our drinking water supply. inspection and testing.
drinking water suppE To ensure your backfl ow prevention device is
• You probably are,if you have: A person who is state-certified in backflow
Don't let your garden hose be the ; prevention device testing must perform the
connection between contaminants and our . • An in ground irrigation system
test and submit the results to the City of
drinking water. : • An ornamental fountain Tigard.If the test results indicate your backfl ow
• An active well prevention assembly is not functioning
• Never submerge the end of a garden • A fish pond
hose when fi Ilin a pool,pond,bucket, properly,it must be repaired and retested
g p p An in-ground swimming pool or spa
tub,sink or any other container. • A solar heating system immediately.
• Never use a garden hose to connect to ; • A fi re sprinkler system For more information on backflow prevention
an underground or drip irrigation system Each of these items,if connected directly to visit the city's web site at:www.tigard-or.gov/
when watering your lawn or garden. the public water system,is required to have backfl ow or contact Tigard Water Quality
The health and safety of our water supply an approved backfl ow prevention device. Program Coordinator Hung Nguyen at
depends on you! This important device prevents stagnant or 503-718-2603 or hung@tigard-or.gov.
• 8 1 Tigard Water Service Area • 2008 Water Quality Report
Important Information about Water and Your Health. . . An Important Message
from the Environmental
Some people may be more vulnerable to other immune system disorders can be at a the risk of infection from cryptosporidium and 0 Protection Agency...
contaminants in the drinking water than the higher risk from infections.These persons other microbial contaminants that may be
general population. Most specifically, infants, should seek advice about drinking water from present in the water. N Water sources(both tap and bottled)
the elderly,and immuno-compromised their health care providers.The Environmental • include rivers,lakes,streams,ponds,
persons such as cancer patients undergoing Protection Agency and the Centers for For more information call the Safe Drinking reservoirs,springs and wells. Water
chemotherapy, persons who have undergone Disease Control and Prevention provide Water Hotline at 1-800-426-4791 or visit the travels over the surface of the land and/or
organ transplants, persons with HIV/AIDS or guidelines on the appropriate means to lessen EPA's web site at www.epa.gov/ow. through the ground,dissolving naturally
occurring minerals which,in some cases,
• includes radioactive materials and other
Lead in the Drinking Water... Are You at Risk? substances resulting from the presence of
• animals or human activity.Contaminants
that might be expected in untreated
In 2007 elevated levels of lead were not home's plumbing.If you are concerned about water include:microbial contaminants,
detected in Tigard's source waters.However, elevated lead levels in your tap water,you may such as viruses and bacteria; inorganic
it is important to remember that exposure to wish to have your water tested.In the meantime `r contaminants such as salts and metals;
lead through drinking water run the tap for 30 seconds to pesticides and herbicides;organic
is possible if materials in a 2 minutes before drinking or chemicals from industrial or petroleum
building's plumbing contain To learn use in cooking.This will flush use;and radioactive contaminants.
lead.The level of lead in more about out water that may have been
water can increase whenin extended contact with your Because of water's natural cycle,drinking
lead exposure
water stays in contact with household plumbing. 50 percent reduction in lead at the tap with ■ water,including bottled water,may contain
lead-based solder and brass contact the pH adjustment. small amounts of some contaminants.
faucets containing lead. LeadLine at Tigard's primary wholesale However,the presence of contaminants
does not necessarily indicate that the water
503-988-4000. water provider,the The Leadline provides free lead-in-water poses a health risk. To ensure that tap
Infants and young children Portland Water Bureau, has testing.The program targets testing water from 0 water is safe to drink,the Environmental
are typically more vulnerable implemented a corrosion households that are most at risk from lead M Protection Agency(EPA)prescribes
to lead in drinking water than the general control treatment to reduce corrosion in in water.Specifically those households with 0 regulations limiting the amount of certain
population.It is possible that lead levels in your plumbing by increasing the pH of the water. pregnant women,or children age six or younger, 0contaminants in water provided by public
home may be higher than other homes in the Comparison of monitoring results with and who live in homes built between 1970 water systems.The EPA establishes test
community as a result of materials used in your without pH adjustment shows more than a and 1985. methods and monitoring requirements for
contaminants and requires public water
CONTAMINANT MCL* 90th Percentile Action Level(Ar, TYPICAL SOURC systems to give public notice in the event
Copper(Cu) 1.30 ppm 0.28 AL exceeded if 10%or more of homes Corrosion of household and commercial of a violation. More information about
tested have levels above 1.30 ppm plumbing systems contaminants and potential health effects
the EPADrinking
's Safe D
Lead(Pb) 15.0 ppb 11.0 AL exceeded if 10%or more of homes Corrosion of household and commercial Water Hotline is available from m 1-800- s Safe D or visit
tested have levels above 15.0 ppb plumbing systems •
■
"Maximum Contaminant Level their web site at www.epa.gov/ow.
�
2008 Water Quality Report • Tigard Water Service Area 1
9 '
How Tigard Information on Detected Disinfection By-Products(HAA5 and TTHM) Sulfate is formed through the erosion of
Regulated Contaminants are formed through chemical reactions between natural deposits.At high levels it can add a
Monitors the chlorine and naturally occurring organic matter salty taste or odor to water.
Federal standards regulate contaminants in the water.The disinfection process is carefully
Water You to protect drinking water quality.These controlled to remain effective while keeping
standards limit the levels of contaminants by-product levels at a minimum. Information on
Drink. . . that are known to occur in water and can Cryptosporidium
' adversely affect public health.The levels Hexachlorocyclopentadiene(HEX)is some-
- of contaminants detected in Tigard's times formed as part of the disinfection process. Cryptosporidium is amicro-organism
' drinking water are far below the maximum (protozoan)naturally present in surface water
d. contaminant levels(MCL)set by the EPA and Nitrates and Nitrites are formed through the supplies throughout the world.Surface water
- as such,do not pose a signifi cant health risk erosion of natural deposits,agricultural activity, supplies are particularly vulnerable if they
to consumers.Below is a list of regulated and leaching septic tanks. receive runoff or pollution from human or
contaminants detected in Tigard's water animal wastes.Since wildlife inhabits the
' supply during 2007. Bull Run,Clackamas River and Trask-Tualatin
Information on Detected Rivers Watersheds,the managing agencies
' Unregulated Contaminants regularly monitor for cryptosporidium and have
2,4-D is a colorless,odorless,powdered g done so for more than ten years.Occasionally,
• herbicide used to control weeds and woody
plants. It has been most widely used Unregulated water quality standards are low levels of cryptosporidium have been
• on wheat and corn crops, pastures and established as guidelines to assist public found.New national standards have been
In addition to the 150 different rangelands. water systems in managing drinking water for established to further reduce the risks of
contaminants tested by our wholesale aesthetic considerations such as taste,color, illness from cryptosporidium.Symptoms of
water providers,Tigard monitors water Antimony is a naturally occurring metal and odor. These contaminants do not present infection include nausea,abdominal cramps
quality through water samples collected used in industrial applications such as fi re a risk to human health. and diarrhea.Most healthy individuals are
within the water distribution system. 0 retardants,ceramics,electronics,and solder. able to overcome the disease within a few
Analysis results indicate Tigard's drinking Radon is a naturally occurring,radioactive gas weeks.However,immuno-compromised
water continues to meet and/or exceed Arsenic,Barium,Chromium,and Fluoride that cannot be seen,tasted or smelled.Radon people have more diffi culty and are at greater
all federal and state drinking water are naturally occurring elements that can has not been detected in Tigard's purchased risk of developing severe,life threatening
standards.Only those contaminants dissolve into the groundwater supply. water supplies,but has been detected at varying illnesses.Immuno-compromised individuals are
detected in the drinking water supply are levels in Tigard's aquifer storage and recovery encouraged to consult their doctor regarding
outlined in the table on page 11. Beta/photon Emitters are formed from the (ASR)wells and native groundwater wells.For appropriate precautions to avoid infection.
erosion of natural and man-made radioactive more information about radon,call the EPA's Cryptosporidium must be ingested to cause
For a complete list of chemicals and deposits. Radon Hotline at 1-800-SOS-RADON or visit disease,and may be spread through means
compounds tested for on a regular basis, ; www.epa.gov/safewater/radon.html. other than drinking water.
visit the City of Tigard's web site at Chlorine is added to maintain disinfection
www.tigard-or.gov/water. ; requirements throughout the water Sodium is formed through the erosion of To learn more about contaminants in water
• natural deposits,added to water during visit www.epa.gov/safewater/sta
distribution system.
• treatment,and is an essential nutrient.
• 10 I Tigard Water Service Area • 2008 Water Quality Report
•
2007 Water Quality Analysis Results
CONTAMINANT MCLG TIGARD ANALYSIS RESULTS TYPICAL SOURCE
LOW F RANGE -+ HIGH
Microbiological Contaminants
Fecal coliform and E.coli 0 0 1 sample had 6 colonies* Human and animal fecal waste
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 100%of samples had Naturally present in the environment
bacteria in more than 5% with detectable non-detectable levels
of samples/month coliform bacteria of coliform bacteria
Turbidity 5.0 NTU NA 0.06 NTU 1.8 NTU Soil erosion
Inorganic Contaminants
Antimony(ppb) 6 6 ND 3 Erosion of natural aquifer deposits,industrial manufacturing
Arsenic(ppb) 10 0 ND 3 Erosion of natural deposits in groundwater aquifers
Barium(ppb) 2000 2000 ND 3.7 Erosion of natural deposits in groundwater aquifers
Chromium(ppb) 100 100 ND 1.1 Erosion of natural deposits in groundwater aquifers
Fluoride(ppm) 4 4 0.13 1.2 Water treatment additive,erosion of natural deposits
Nitrate(ppm) 10 10 ND 1.3 Erosion of natural deposits,run-off from fertilizer,septic tank leaching,sewage
Nitrite(ppm) 1 1 ND 0.06 Erosion of natural deposits,run-off from fertilizer,septic tank leaching,sewage
Synthetic Organic Contaminants (including pesticides and herbicides)
2,4-D(ppm) 70 70 ND 0.632 Agricultural run-off
Hexachlorocyclopentadiene(ppb) 50 50 ND 0.06 Probable by-product of drinking water disinfection
Radiological Contaminants
Beta/photon emitters(pCi/1) 50 0 ND 2.4 Erosion of natural deposits in groundwater aquifers
Disinfection By-Product Contaminants
Chlorine(ppm) 4 4 0.03 1.9 Water additive used to control microbes
Haloacetic Acids(ppb) 60 NA 1.2 50.2 By-product of drinking water disinfection
Total Trihalomethanes(ppb) 80 NA 14.7 52.7 By-product of drinking water disinfection
Unregulated and Secondary Contaminants (regulations provide advisory limits only)
Radon(pCi/1) No standard No standard 3 500 Found in natural aquifer deposits
Sodium(ppm) 20 20 2.8 19 Erosion of natural deposits,water treatment additive
Sulfate(ppm) 250 250 ND 11 Naturally occurring substance in drinking water
*100%of samples had 20 or fewer bacterial colonies per 100 milliliters of water
Action Level(AL):The concentration of a contaminant,which,if exceeded,triggers treatment,or other requirements that a water system must follow.
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 contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
Maximum Residual Disinfectant 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 Disinfectant Level Goal(MRDLG):The level of a drinking water disinfectant below which there is no known or expected risk of health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contamination.
Nephelometric Turbidity Units(NTUs):Turbidity is a measure of how clear the water looks. Turbidity can interfere with disinfection and provide a medium for microbial growth.
Parts per million(ppm):parts per billion(ppb):These units describe the levels of detected contaminants. One part per million is equal to one minute in two years. One part per billion is equal to one minute in 2,000 years.
Picocurries per Liter(pCi/I):A standard measurement of beta particles in water.
Treatment Technique(TT):A required process intended to reduce the level of a contaminant in drinking water.
2008 Water Quality Report • Tigard Water Service Area 11
Who Are You Going to Call?
Have a Water-Related Question? Tigard Has the Answer!
Have a question about your water bill? C7
W Contact Utility Billing at 503-639-4171. R m
`n �z
Concerned about your water quality? b
Contact Water Quality Program Coordinator Sally Mills at aCD •�' �•
503-718-2604 or sally@tigard-or.gov. N o
Interested in learning more about conservation? CD N
2 Contact Water Quality Program Coordinator Jennifer Joe at o
503-718-2599 or jennifer@tigard-or.gov.
Wondering if you have,or need,a backflow prevention device? Q Q
- Contact Water Quality Program Coordinator Hung Nguyen at
503-718-2603 or hung@tigard-or.gov.
Having issues with your water pressure? 1 111.
`° O
-rte Contact Water Operations Supervisor Sam Morrison at 3CIDd o y
503-718-2600 or samm@tigard-or.gov. o n
Questions regarding future water sources?
2 Contact Public Works Director Dennis Koellermeier at
503-718-2596 or Bennis@tigard-or.gov.
Experiencing a water emergency?
W Contact the City of Tigard at 503-639-4171. o ti
Experiencing an after-hours water emergency? s
2 Contact the City of Tigard On-Call Service at 503-639-1554.
■ A
u' Source Water Assessment for Tigard Water Service Area R
In 2005,the Oregon Departments of Human Services(DHS)and Environmental
■ N
Quality(DEQ)conducted a source water assessment for the groundwater wells
serving the Tigard Water Service Area.The purpose of the assessment was to
identify potential sources of direct and indirect contamination in areas surrounding ■
the groundwater wells.The assessment identified 50 potential contaminant sources
(natural and man-made)that may affect the water quality if managed improperly. y .�
■ a U y
To view a summary of the assessment,please contact Water Quality Program e d
Coordinator Sally Mills at 503-718-2604 or sally@tigard-or.gov. m d