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2009 Water Quality Report Tigard Water Service Area 2009 Water Quality Report ' �- r F4� L 17 Y owl.P', i FF f t� . 3 u "Clean water is not an expenditure of Federal funds; clean water is an investment in the future of our economy." -BUD SHUSTER,U.S. REPRESENTATIVE An Important Message Tigard and Lake Oswego Form Water Alliance for the Future from the Environmental • • rates are expected to nearly double over Protection Agency. . . the next ten years as improvements are Water sources(both tap and brought online.Following the initial ten-year bottled)include rivers,lakes, investment, rates will likely stabilize or even streams,ponds,reservoirs, • decrease slightly. ...•.' springs and wells.Water travels • over the surface of the land and/or through Water Quality the ground,dissolving naturally occurring With this partnership,the Clackamas River minerals which,in some cases,include will become the TWSA's water source.The radioactive materials and other substances ast August the City of Tigard and the Cost and Quantity river is an excellent raw water source and resulting from the presence of animals or City of Lake Oswego entered into a The cost to develop the Tigard/Lake Oswego has a 100-year history of supplying water human activity.Contaminants that might water partnership agreement.Under this partnership projects is estimated at$136 to neighboring communities. Moreover be expected in untreated water include: partnership,Tigard and Lake Oswego will jointly: million.Tigard's share of the improvements Tigard and Lake Oswego will transform Lake microbial contaminants,such as viruses and • Expand Lake Oswego's existing water and cost to buy-in to Lake Oswego's existing Oswego's existing water treatment plant to a bacteria;inorganic contaminants such as • salts and metals;pesticides and herbicides; organic chemicals from industrial or petroleum use;and radioactive contaminants. Because of water's natural cycle,drinking water,including bottled water,may contain small amounts of some contaminants. However,the presence of contaminants does not necessarily indicate that the water poses a health risk.To ensure that tap water In addition is safe to drink,the Environmental Protection Tigard will gain Agency(EPA)prescribes regulations limiting the amount of certain contaminants in water ownership in provided by public water systems.The EPA a water source establishes test methods and monitoring requirements for contaminants and requires and a water public water systems to give public notice in system. the event of a violation. More information about contaminants and potential health effects is available from the EPA's Safe Drinking Water Hotline at 1-800-426-4791 or visit their web site at www.epa.gov/ow. The Purpose Tigard WaterService Area of this Report. . . _ 6 Tigard Water Service Boundary Taylor's Ferry Roa The City of Tigard is responsible for providing I Tualatin Valley Water District " a clean,safe,dependable supply of drinking Tigard Water Service in TVWD L tocustst.- water to over 57,000 residents located in +. _ BFJ111ERT H the Tigard Water Service Area(TWSA).The - Board Commissioners left to right:Julie Russell, North Dakota Street ���P a�`�` service area includes the cities of Durham, > ; .Su,9 Pfaffl e St.Q Tigard Water District;Patrick Carroll,City of Durham; d o9oa King City,two-thirds of Tigard and the Gretchen Buehner,City of Tigard;Bill Scheiderich, unincorporated areas to the south and west Member At-Large;Dick Winn,City of King City. of Tigard.This report is designed to present a _ �,� Walnut summary of Tigard's 2008 water quality data. you to attend their monthly meetings.Meetings Additional information is provided to inform, are scheduled for the second Wednesday of ' 'ti. - y Gaarde Street Q� McDonald Street educate and update consumers on water each month at 5:30 p.m.in the Tigard Public Bull Mtn.Rd. issues affectingthe community. Works Building Auditorium located at 8777 SW 'r Bull mountain R Bonita Road y g LININ- I f Tigard Water P Burnham Street in Tigard,Oregon. CORPORareo-j' . ' .'r" Service Area Municipalities within the TWSA are represented WASHINGTON COUNTY t{ r+ by the Intergovernmental Water Board(IWB). For more information regarding this report, KING Durham Road = The Board advises the Tigard City Council on please contact the Environmental Program y CITY LL water-related matters.If you are interested in Coordinator,Sally Mills at 503-718-2604 or learning more about your water,the IWB invites sally@tigard-or.gov. 3 Source Information Tigard also purchases water from the City of Lake Oswego.Lake Oswego draws The City of Tigard does not have ownership in a its water from the Clackamas River Basin. water supply capable of meeting the current and Encompassing nearly 940 square miles,the How Tigard Monitors the Water You Drink. . . future demands of its residents.In order to meet basin begins in the Mt.Hood National Forest. b the growing demand,Tigard purchases nearly Drawn from the Clackamas River,the water In addition to the 150 different contaminants tested by our wholesale water providers, 90 percent of its water from wholesale providers is pumped through a pipeline buried beneath Tigard monitors water quality through water samples collected within the water such as the Portland Water Bureau(PWB). the Willamette River to the Lake Oswego distribution system.Analysis results indicate Tigard's drinking water continues to meet Treatment Plant located in West Linn. and/or exceed all federal and state drinking water standards. Only those contaminants The PWB manages the Bull Run Watershed,a detected in the drinking water supply are outlined in the table on page 7. surface water supply,located in the Mount Hood During periods of high water demand Tigard National Forest.In cases of emergency and/or can supplement its supply with water from For a complete list of chemicals and compounds tested for on a regular basis,visit the high demand,the PWB also maintains ground- city-owned aquifer storage and recovery City of Tigard's web site at www.tigard-or.gov/water. water wells located along the Columbia River wells and native groundwater wells. 2009 Water Quality Report • Tigard Water Service Area 1 3 4 \\1 n1 0 0 0 u � What's Your WeeklyWatering Number? Ever wonder just how much • Vegetables: 75%of the Weekly Watering If you water with a hose or your sprinkler water your lawn and plants Number system doesn't have a water budget feature, you can use the Weekly Watering Number as need each week?Well,we've got How Do I Measure My Watering? a guideline to manually adjust your watering your number—your Weekly To determine how much water you are giving volume,duration and frequency. Watering Number that is! your landscape,a free set of watering gauges is available from your water provider.Just Where Can I Find the What Is the Weekly stop by the Tigard Public Works Building, Weekly Watering Number? Watering Number? 8777 SW Burnham Street,during regular The number is published each Thursday for Published each Thursday from April business hours to pick up —� the upcoming week at www.conserveh20.org. through September,the Weekly your gauges. ' You can also sign up to receive the Weekly Watering Number is the amount r`. Watering Number by email at this site. of water,in inches,your lawn How Do I Use the " will need in the coming week. Weekly Watering Number? Who Provides the The number is determined by If your automatic sprinkler system Weekly Watering Number? a local weather forecasting is equipped with a"water The number is provided by the Regional service and will vary based on budget"or"percent adjust" Water Providers Consortium. The City of anticipated weather conditions feature,the Weekly Watering Tigard,along with 23 other water providers such as temperature and rainfall. Number can help you fi ne tune and Metro, make up the consortium.Among your system on a weekly basis to other things,the consortium works to help You can also apply the Weekly refl ect local weather conditions residents of the Portland metro area use Watering Number to the water and your landscape's changing water wisely. needs of established plants,using need for water. For specifi c these general guidelines: instructions on programming For more information about water conserva- • Shrubs: 50%of the Weekly Watering your sprinkler system using the Weekly tion,please visit www.tigard-or.gov/water or Number Watering Number,visit www.conserveh20.org. contact Environmental Program Coordinator • Trees:50%of the Weekly Watering Remember,your system may require Jennifer Joe at 503-718-2599 or jennifer@ Number adjustments every week. tigard-or.gov. 4 1 Tigard Water Service Area • 2009 Water Quality Report r JJ,��y, JiiJ��JI�o�' %�iiir JJ� _��iiJrrinio 0/_// �(Ite fir J j'J��,� You may be surprised to learn that many outdoor, or faucets.These devices water-related activities can pose a risk to our prevent water from being drinking water.Consider this scenario: drawn back into the water supply. You are washing your car and your garden hose HVBs are is submerged in a bucket of soapy water.A few relatively inex- blocks away,a water line breaks and the water pensive and pressure is lowered to the point that a vacuum is are available created in the water line.As a result,the soapy at most water is drawn through your hose,and into plumbing household plumbing and the water distribution or home improvement supply stores. system.You've just contaminated the drinking water supply! Everyone plays an essential role in ensuring our community receives safe,clean drinking water. You can prevent this scenario by: Please act responsibly and do your part. • Not submerging the end of a garden hose in water when filling a pool,pond,bucket,tub, For more information,visit www.tigard-or.gov/ sink or any other container. backfl ow or contact Backfl ow/Cross Connection • Installing small devices,called hose connection Specialist Hung Nguyen at 503-718-2603 or vacuum breakers or HVBs,to outdoor hose bibs hung@tigard-or.gov. Source1 Tigard Water Service Area In 2005,the Oregon Departments of Human Services(DHS)and Environmental Quality(DEQ)con- ducted 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. To view a summary of the assessment,please contact Environmental Program Coordinator Sally Mills at 503-718-2604 or sally@tigard-or.gov. Investments in Our Community's Water System � r To your house In 2009 the City of Tigard completed to house the pump,valves, piping and construction of an underground reservoir treatment system.ASR allows the City of located in Tigard off Bull Mountain Road, Tigard to store large quantities of water opposite Alberta Rider Elementary School. approximately 1,000 feet below ground in A PARK IS BORN! The 3-million-gallon reservoir: an underground rock formation called an Once the underground reservoir • Supplies drinking water to Tigard water "aquifer."This is done in the rainy season was completed,Elizabeth Price customers on the south and east sides of when the region's water supply is plentiful Park was constructed on the Bull Mountain. and water can be purchased at an 80 site.Park amenities include a • Provides additional water storage.This is percent discount over typical water rates. playground for young children, especially important during times of high During times of peak demand,the same picnic tables,a winding interpre- water demand. stored water is pumped out of the aquifer, tive trail,and plenty of open • Saves pumping costs. Located midway re-chlorinated and sent to the reservoir. From space both on top and adjacent to up the mountain,the reservoir increases there,the water will fl ow downhill through the reservoir.The 2.7-acre park efficiency by eliminating the need to pump water lines and into customer's homes. recently opened to the public. the area's entire water supply to the top of Parking is available on Greenfi eld the mountain. Tigard's two existing ASR wells hold Drive,one block east • Improves fi re protection in the area. approximately 360 million gallons.When of the park. • Provides an additional water source completed,the third well is expected to hold Aquifer should the City's primary water supply be another 150 million gallons.Water from ASR 150 million gallons interrupted. is used to supplement Tigard's other drinking 1,000'deep water sources and reduces our need to draw Tigard's third aquifer storage and recovery water from area rivers during the summer Elizabeth Price Park is located at (ASR)well is also located on the reservoir when water levels may be low.This practice 13001 SW Bull Mountain Road, site and will be brought online in 2011 contributes to the health of area rivers and opposite Alberta Rider Elementary. following the construction of a small building the fi sh,animals and other life they support. 2009 Water Quality Report • Tigard Water Service Area 5 Important Information Information on Detected Nitrates and Nitrites are formed through the Sodium is formed through the erosion of erosion of natural deposits,agricultural activity, natural deposits,added to water during about Water and Regulated Contaminants and leaching of septic tanks. treatment,and is an essential nutrient. Your Health Federal standards regulate contaminants to protect drinking water quality. These p-Dichlorobenzene is an organic solid of Sulfate is formed through the erosion of natural Some people may be standards limit the levels of contaminants white crystals with amothball-like odor.It is deposits and at high levels can contribute to a more vulnerable to N that are known to occur in water and can most widely used as an insecticidal fumigant salty taste and/or odor in water. contaminants in the F- adversely affect public health. The levels of against clothes moths and as a deodorant drinking water than '�• for garbage and restrooms,as well as in contaminants detected in Tigard's drinking the general popula water are far below the maximum contaminant insecticides and fungicides for crops,and in the Cryptosporidium tion. Most specifically, _ 0 levels(MCL)set by the U.S.EPA and as manufacture of chemicals,plastics,dyes and infants,the elderly, pharmaceuticals. Cryptosporidium is a micro-organism(proto- „��, � such,do not pose a significant health risk and immuno-compro- 1. zoan)naturally present in surface water supplies . - ._ to consumers. Below is a list of regulated supplies mised persons such as throughout the world.Surface water contaminants detected in Tigard's water supply Radium 226 and 228(combined)is formed g cancer patients under- 0 from the erosion of natural and man-made are particularly vulnerable if they receive runoff - during 2008. going chemotherapy, pollution from human or animal wastes.Since � deposits. or persons who have under- Arsenic Barium and Fluoride are natural) wildlife inhabits the Bull Run and Clackamas gone organ transplants, occurring elements that can dissolve into the River Watersheds,the managing agencies persons groundwater supply. Information On Detected regularly monitor for cryptosporidium and have with 0 Unregulated Contaminants done so for more than ten years.Occasionally, HIV/AIDS or other immune system 0Chlorine is added to maintain disinfection low levels of cryptosporidium have been found. disorders can be at a higher risk from • requirements throughout the water distribution Unregulated water quality standards are New national standards have been established infections.These persons should seek system. established as guidelines to assist public to further reduce the risks of illness from advice about drinking water from their 0 water systems in managing drinking water for cryptosporidium.Symptoms of infection include health care providers.The Environmental N Dichloromethane is a colorless liquid with aesthetic considerations such as taste,color, nausea,abdominal cramps and diarrhea.Most Protection Agency and the Centers for 0 a sweet,chloroform-like odor.It is commonly and odor. These contaminants do not present healthy individuals are able to overcome the Disease Control and Prevention provide Nfound in paint remover.It is also used as a risk to human health. disease within a few weeks.However,immuno- guidelines on the appropriate means an industrial solvent and cleaning agent,a compromised people have more difficulty and to lessen the risk of infection from fumigant for strawberries and grains,and to Radon is a naturally occurring, radioactive are at greater risk of developing severe,life cryptosporidium and other microbial extract substances from food products. gas that cannot be seen,tasted or smelled. threatening illnesses.Immuno-compromised contaminants that may be present in Radon has not been detected in Tigard's individuals are encouraged to consult their doctor the water. Disinfection By-Products(Haloacetic purchased water supplies,but has been regarding appropriate precautions to avoid Acids and Total Trihalomethanes)are detected at varying levels in Tigard's aquifer infection.Cryptosporidium must be ingested For more information call the Safe formed through chemical reactions between storage and recovery wells and native to cause disease,and may be spread through Drinking Water Hotline at 1-800-426- • chlorine and naturally occurring organic matter groundwater wells. For more information means other than drinking water. 4791 or visit the EPA's web site at 0 in the water, The disinfection process is about Radon,call the EPA's Radon Hotline www.epa.gov/ow. carefully controlled to remain effective while at 1-800-SOS-RADON or visit www.epa. keeping by-product levels at a minimum. gov/safewater/radon/html. ■ 6 1 Tigard Water Service Area • 2009 Water Quality Report 2008 Water Quality Analysis Results CONTAMINANT MCL MCLG TIGARD ANALYSIS RESULTS TYPICAL SOURCE LOW E RANGE 4 HIGH Fecal coliform and E.coli 0 0 1 sample had 10 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 5 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 0.051 NTU 5.0 NTU Soil erosion off- Arsenic(ppb) 10 0 NO 2 Erosion of natural deposits in groundwater aquifers Barium(ppm) 2 2 NO 0.03 Erosion of natural deposits in groundwater aquifers Fluoride(ppm) 4 4 NO 0.22 Water treatment additive,erosion of natural deposits Nitrate(ppm) 10 10 NO 2.5 Erosion of natural deposits,run-off from fertilizer,septic tank leaching,sewage Nitrite(ppm) 1 1 NO 0.16 Erosion of natural deposits,run-off from fertilizer,septic tank leaching,sewage 7`61atileUrganic p-Dichlorobenzene(ppb) 75 75 NO 1 Discharge from industrial chemical factories Dichloromethane(ppb) 5 0 NO 1.8 Discharge from pharmaceutical and chemical factories Radiological Combined Radium(pCi/1) 5 0 NO 1.67 Found in natural aquifer deposits Disinfection By-Product Chlorine(ppm) 4 4 NO 1.26 Water additive used to control microbes Haloacetic Acids(ppb) 60 NA NO 56 By-product of drinking water disinfection Total Trihalomethanes(ppb) 80 NA 7.2 46 By-product of drinking water disinfection . . . p Radon(pCi/1) No standard No standard 30 358 Found in natural aquifer deposits Sodium(ppm) 20 20 2.8 11.8 Erosion of natural deposits,water treatment additive Sulfate(ppm) 250 250 1.1 13 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. Method Detection Limit(MDL):The lowest concentration of a substance that can be accurately measured using applicable testing methods. Non-detected(ND):Not detected at or above the MDL(Method Detection Limit). 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/1):A standard measurement of beta particles in water. Treatment Technique(Tr):A required process intended to reduce the level of a contaminant in drinking water. 2009 Water Quality Report • Tigard Water Service Area 1 7 Lead in the Drinking Water... Are You at Risk? Elevated levels of lead can cause serious from work or school.You can minimize the .. health problems,especially for pregnant potential for lead exposure by flushing your women and young children.Although lead tap for 30 seconds to 2 minutes before using w n is not present in Tigard's water sources or water for drinking,cooking,or preparing a U m its distribution system,lead was detected in baby formula.You may also want to consider the drinking water of some installing a water filter x ►-� homes in the Tigard Water and/or low-lead faucets. N Service Area(TWSA). To learn more about lead Although the City of Tigard In the TWSA,lead entersis responsible for providing drinking water primarily exposure contact high quality drinking water through materials and the Leadline at to customers,it cannot components associated 503-988-4000. control the variety of with a home's water service materials used in plumbing line and/or plumbing.For components beyond the example,lead can leach into drinking water water meter. It does,however,provide water from the corrosion,or wearing away,of which has undergone a treatment process household plumbing components like brass to increase pH which helps to reduce the - and chrome-plated faucets and lead-based corrosion of plumbing components. = solder used to join copper pipe. To learn more about lead exposure contact Lead levels in drinking water vary depending the LeadLine at 503-988-4000 or visit on the plumbing components used and www.leadline.org. For more information on the amount of time water is in contact with lead in drinking water,testing methods,and those components.Lead is most often steps you can take to minimize exposure, found in drinking water that has been sitting contact the Safe Drinking Water Hotline in household plumbing for several hours, at 1-800-426-4791 or visit www.epa. such as in the morning,or after returning gov/safewater/lead. CONTAMINANT MCL* 90th ACTION LEVEL(AL) TYPICAL PERCENTILE SOURCE Inorganic Contaminants Copper(Cu) 1.30 ppm 0.37 AL exceeded if 10%or more of homes tested have Corrosion of o levels above 1.30 ppm household and o Lead(Pb) 15.0 ppb 10.0 AL exceeded if 10%or commercial z H more of homes tested have plumbing o o d levels above 15.0 ppb *Maximum Contaminant Level