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2012 Water Quality Report TIGARD WATER SERVI TWSA AREA CE Providing a clean,safe,dependablepp Tigard,water to the residents of Durham,King City,two-thirds of . ReportAnnual Water Quality WATER SYSTEM INFORMATION —A 111111a. The Pof this Report . . . P, he City of Tigard is responsible for providing a clean, safe, Questions? dependable supply of drinking water to just over 58,000 residents Tigard has the answers! of the Tigard Water Service Area (TWSA). The service area includes Your Water Bill? the cities of Durham King City, two-thirds of Tigard and the Tigard Utility Billing 503-718-2460 Water District. Entities within the service area are represented by the Water Quality? Jennifer Joe Intergovernmental Water Board (IWB). The board advises the Tigard jennifer@tigard-or.gov 503-718-2599 City Council on water-related matters. Water Conservation? Jennifer Joe jennifer@tigard-or.gov This report summarizes Tigard's 2011 water quality data. Additional 503-718-2599 information is provided to inform, educate and update consumers on Backflow Prevention? Hung Nguyen water issues affecting the community. hung@tigard-or.gov 503-718-2603 Water Emergencies? Public Works Are you interested in learning more about your water? 503-718-2591 After-hours If so, the IWB invites you to attend its monthly meetings , Water Emergencies? held the second Wednesday of each month at 5:30 p.m. On-call Service 503-639-1554 in the Tigard Public Works Building Auditorium located General Inquiries? at 8777 SW Burnham St., Tigard, Oregon. Public Works r ' 503-718-2591 "` Tibere / oesTigards water Ar !q► S 0 U R C IF 0 T 1 0 a The City of Tigard does not have ownership in a T I G A R D W A T E R SERVI CE AREA water supply capable of meeting the existing and future demands of its water customers.Currently, .... Tigard purchases nearly 90 percent of its water from ... Tigard Water Service Boundary — wholesale water providers such as the Portland Tualatin Valley Water District Tualatin valley Tigard Water District R�'a�� Water Bureau (PWB). tr��t • • y�y Service The PWB manages the Bull Run Watershed,a BEAVERTON j Area protected surface water supply,located in the Mount a "��• Hood National Forest.In cases of emergency,high :• Tigard �••�r►�• demand or when water quality is compromised,the . Water • PWB switches to its groundwater wells located along ■' ••� ■�� ���� • the Columbia River.For example,in 2011 there was , : Service c\G��a. ► �• a storm event in the Bull Run Watershed which ; Area ; •: increased turbidity levels in that supply.To meet ■ UNINCORPORATED TIGARD 3 demand,PWB turned on itsroundwater wells ■ WASHINGTON COUNTY ■ g ■ ■■■■■REPRESENTED ■i which provided 100 percent of our drinking water ■ BY THE TIGARD _ a -- aI WATER DISTRICT m from Jan. 16 to Feb. 1. ■ Durham Road = I■ Beet Beadpad `. ■ Tigard also purchases water from the City of Lake ■ �'-- KING CITY �� _ Oswego.Lake Oswego draws its water from the •� �• a Clackamas River Basin.Encompassing nearly 940 ■ ■•'• ����� ■ square miles,the basin begins in the Mt.Hood l •���1� 40 y ■■■ National Forest.Drawn from the Clackamas River, *#�� the water is pumped through a pipeline buried TUALATIN Iw• _ beneath the Willamette River to the Lake Oswego Treatment Plant located in West Linn. During periods of high water demand,Tigard can r_ I supplement its supply with water from city-owned aquifer storage and recovery wells and a native groundwater well. Future Water Supply The Lake Oswego Tigard Water Partnership will provide reliable,high-quality drinking water to your home or business in 2016.For more information visit:www.lotigardwater.org. Information on Detected Contaminants Definitions In addition to the more than 200 regulated Disinfection Byproducts (Haloacetic Action Level(AL):The concentration of a con- and unregulated contaminants monitored Acids and Total Trihalomethanes) taminant,which,if exceeded,triggers treatment or by our wholesale water providers,Tigard are formed through chemical reactions other requirements that a water system must follow. tested water quality through water samples between chlorine and naturally Maximum Contaminant Level(MCL):The highest level of a contaminant that is allowed collected within the TWSA water occurring organic matter in the water. in drinking water.MCLs are set as close to the distribution system.Analysis results The disinfection process is carefully MCLGs as feasible using the best available indicated Tigard's drinking - controlled to keep byproduct levels to treatment technology. water continues to meet and/ a minimum,while maintaining the Maximum Contaminant Level Goal(MCLG): or exceed all federal and state required levels of chlorine. The level of contaminant in drinking water below drinking water standards. which there is no known or expected risk to Nitrates and Nitrites are formed health.MCLGs allow for a margin of safety. Federal standards regulate con- through the erosion of natural Maximum Residual Disinfectant Level taminants to protect drinking deposits,agricultural activity and (MRDL):The highest level of a disinfectant water quality. These standards leaching of septic tanks. allowed in drinking water.There is convincing evidence that addition of a disinfectant is limit the levels of contaminants that are known to occur Gross Alpha and Gross Beta necessary for control of microbial contaminants. in water and can adverselyare particles emitted from the Maximum Residual Disinfectant Level decay of natural and man-made Goal(MRDLG):The level of a drinking water affect public health.The levels disinfectant below which there is no known or of contaminants detected in radioactive mineral deposits. expected risk of health.MRDLGs do not reflect Tigard's drinking water are far below the the benefits of the use of disinfectants to control maximum contaminant levels(MCLS) UNREGULATED CONTAMINANTS microbial contamination. set by the Environmental Protection Unregulated water quality standards are Method Detection Limit(MDL):The lowest established as guidelines to assist public concentration of a substance that can be accu- Agency(EPA) and as such,do not pose a rately measured using applicable testing methods. significant health risk to consumers. water systems in managing drinking water for aesthetic considerations such as taste, Non-detected(ND):Not detected at or above Below is a list of contaminants detected in color and odor.These contaminants do not the MDL. Tigard's water supply in 2011.If a known present a risk to human health. Not Applicable(NA):Not applicable for the health-related contaminant is not listed,it specified contaminant. was not detected in the drinking water. Radon is a naturally occurring Nephelometric Turbidity Units(NTUs): radioactive gas that cannot be seen,tasted Turbidity is a measure of how clear the water REGULATED CONTAMINANTS or smelled.Radon has been detected looks.Turbidity can interfere with disinfection Antimony,Arsenic,Barium, at varying levels in water from Tigard's and provide a medium for microbial growth. Chromium(total),Copper,Fluoride aquifer storage and recovery(ASR)wells Parts per Million(ppm)or Milligrams per Liter(mg/L):A unit measurement describing the and Lead are naturally occurring and native groundwater well.For more level of detected contaminants that is one part by elements that can dissolve into the information about radon,call the EPA's weight of analyte to one million parts by weight of groundwater supply.At the levels found Radon Hotline at 1-800-SOS-RADON or the water sample.One part per million corresponds in drinking water,they are unlikely to visit wwwepa.gov/radon. to one penny in$10,000 or approximately one minute in two years.One part per million is equal to contribute to adverse health effects.For Sodium is formed through the erosion 1,000 parts per billion. more information on lead in drinking of natural deposits and may be added to Parts per Billion(ppb)or Mircograms per water,see page 6. water during treatment. Liter(pg/L):A unit measurement describing the level of detected contaminants that is one part by Chlorine is added to maintain disinfection Sulfate is formed through the erosion of weight of analyte to one billion parts by weight of requirements throughout the water the water sample.One part per billion corresponds natural deposits and at high levels can con- to one penny in$10,000,000 or approximately distribution system. tribute to a salt taste and/or odor in water. y one minute in 2,000 years. Cyanide typically enters water as a natu- Picocurries per Liter(pCi/1):A standard rally occurring element that dissolves into For a complete list of chemicals and measurement of radioactivity in water. the groundwater supply.Testing showed the compounds monitored on a regular Treatment Technique(TT):A required process cyanide originated from algae and plants basis, visit the Oregon Health Authority intended to reduce the level of a contaminant in naturally found in the Bull Run Watershed. website at http://170.104.63.91 drinking water. 2012 Water Quality Report • Tigard Water Service Area 1 3 011 Water , ' nalysi* s Results: '1' • standards '1 • contaminants1 1' 1 protect drinking • 1 • 1• 1 1 • • providers 1 2I 1 II regulated • 1 unregulated contaminants. 1 results are '1 below. CONTAMINANT MCL MCLG TWSA RESULTS VIOLATION TYPICAL SOURCE LOW E RANGE + HIGH YES/NO is i i Fecal coliform and E.coli 0 0 2 samples had 4 bacterial colonies(100%of samples had NO Human and animal fecal waste 20 or fewer bacterial colonies per 100 milliliters of water) Cryptosporidium TT required:By April 1,2012 NA 1 sample of 40 liters had 1 oocyst NO Animal waste Giardia lamblia TT required:Disinfection to inactive 99.9%of cysts NA 1 sample of 10 liters had 1 Giardia cyst NO Animal waste Total coliform bacteria Must not detect coliform bacteria in more than 0%of samples with detectable coliform bacteria 1 of 61 samples in January had detectable coliform(<2%) NO Naturally present in the environment 5%of samples per month 1 of 60 samples in July had detectable coliform(<2%) 1 of 60 samples in August had detectable coliform(<2%) Turbidity(NTU) 5 NA 0.20 4.40 NO Soil erosion Antimony(ppb) 6 6 NO 0.23 NO Erosion of natural deposits,industrial manufacturing Arsenic(ppb) 10 0 NO 1.20 NO Erosion of natural deposits in groundwater aquifers Barium(ppm) 2 2 NO 0.0079 NO Erosion of natural deposits in groundwater aquifers Chromium—Total(ppb) 100 100 NO 0.70 NO Erosion of natural deposits in groundwater aquifers Copper(ppm) NA' 1.3 <0.002 0.0009 NO Erosion of natural deposits in groundwater aquifers Fluoride(ppm) 4 4 NO 0.16 NO Water treatment additive,erosion of natural deposits Lead(ppb) NA 0 NO 0.09 NO Erosion of natural deposits Nitrate(ppm) 10 10 NO 2.60 NO Erosion of natural deposits,runoff from fertilizer, leaching from septic tanks and sewage Nitrite(ppm) 1 1 NO 0.04 NO Erosion of natural deposits,runoff from fertilizer, leaching from septic tanks and sewage Gross Beta(pCi/I) NA3 0 NO 2.60 NO Decay of natural deposits A Chlorine(ppm) 4 4 NO 2.05 NO Water additive used to control microbes Haloacetic Acids(ppb) 60 NA 1.20 35.60 NO Byproduct of drinking water disinfection Total Trihalomethanes(ppb) 80 NA 5.00 38.50 NO Byproduct of drinking water disinfection Radon(pCi/I) No Standard No Standard NO 370.00 NO Found in natural aquifer deposits Sodium(ppm) 20 20 NO 16.90 NO Erosion of natural deposits,water treatment additive Sulfate(ppm) 250 250 NO 6.82 NO Naturally occurring substance in drinking water I During the year,tests with varying method reporting limits(MRLs)were used to analyze copper.The sample with results of<0.002 was analyzed by the test with a less sensitive MRL;this results in data where the minimum appears to be greater than the maximum. 2 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 6 for more information. 3 Community water systems monitor for gross alpha at a screening level of 15 pCi/I and 50 pci/I for gross beta.The screening level is not health based,but rather a level at which additional and increased monitoring would be required.Those systems detecting gross alphas or gross betas at or above the screening level are required to meet an MCL of four millirems per year. Lead and Copper Sampling at High Risk Residential Water Taps CONTAMINANT 90th Percentile MCL AL TYPICAL SOURCE Copper(ppm) 0.29 1.30 AL exceeded if 10%or more of homes tested have levels above 1.30 ppm Corrosion of household and commercial plumbing Lead(ppb) 12.0 15.0 AL exceeded if 10%or more of homes tested have levels above 15.0 ppb Corrosion of household and commercial plumbing 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,NO: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,pCIA:picocurries per liter,TT:treatment technique.For complete definitions,see page 3. 4 1 Tigard Water Service area • 2012 Water Quality Report 2012 Water Quality Report • Tigard Water Service Area I 5 Cryptosporidium Lead in the Drinking Water. . . Are You at Risk? Elevated levels of lead can cause serious health problems,especially for pregnant women and young children.In the Tigard Water Service Area(TWSA),lead enters drinking water primarily through materials and components associated with a home's water service line 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 Cryptosporidium is a micro- amount of time water is in contact with those components.Lead organism(protozoan) naturally present is most often found in drinking water that has been sitting in in surface water supplies throughout household plumbing for several hours,such as in the morning, the world.Surface water supplies are or after returning from work or school.You can minimize particularly vulnerable if they receive the potential for lead exposure by flushing your tap for runoff or pollution from human or 30 seconds to 2 minutes before using water for drinking, animal wastes. cooking,or preparing baby formula.You may also want to Since wildlife inhabits the Bull Run consider installing a water filter and/or low-lead faucets. t and Clackamas River Watersheds,the - Although the City of Tigard is responsible for providing high managing agencies regularly monitor quality drinking water to customers,it cannot control the for Cryptosporidium and have done so materials used in plumbing components beyond the for more than 10 years.Occasionally, r- water meter.It does,however,provide water which has low levels of Cryptosporidium have undergone a treatment process to increase the pH which been found. s helps to reduce the corrosion of plumbing components. New national standards have been To learn more about lead exposure contact the LeadUne at 503-988-4000 or visit established to further reduce the risks www.leadline.org.For more information on lead in drinking water, testing methods of illness from Cryptosporidium. and steps you can take to minimize exposure, call the Safe Drinking Water Hotline at Symptoms of infection include nausea 1-800-426-4791 or visit www.epa.gov/safewater/lead abdominal cramps and diarrhea. Most healthy individuals are able to overcome the disease within a few weeks.However,immuno-compromised people have more difficulty and are TWSA Source Water Assessment at greater risk of developing severe, life threatening illnesses.Immuno- compromised individuals are In 2005,the Oregon Health Authority and the Department of Environmental Quality encouraged to consult their doctor conducted a source water assessment for the aquifer storage and recovery wells and the native regarding appropriate precautions to groundwater well serving the TWSA.The purpose of the assessment was to identify potential avoid infection. sources of direct and indirect contamination in areas surrounding these wells. Cryptosporidium must be ingested The assessment identified 50 potential contaminant sources(natural and man-made)that for it to cause disease and may be may affect the water quality if managed improperly. spread through means other than drinking water. To view a summary of the assessment, contact Environmental Program Coordinator Jennifer joe at 503-718-2599 or jennifer@tigard-orgov. 6 I Tigard Water Service Area • 2012 Water Quality Report An Important Message } 5°•r� . Important Information from the Environmental �� About Water Protection Agency (EPA) •� and Your Health Some people may be more vulnerable to contaminants in the drinking water than others.Most specifically,infants, T• �: the elderly and immuno-compromised .- - persons such as cancer patients 'Pow - undergoing chemotherapy,persons who have undergone organ transplants,and persons with HIV/AIDS or other immune system disorders can be at a higher risk from infections. ar These persons should seek advice about The Clackamas River,a tributary of the Willamette River,is a high quality water source. drinking water from their health care providers.The EPA and Centers for Sources of drinking water(both tap and bottled) include rivers,lakes,streams,ponds, Disease Control and Prevention provide reservoirs,springs and wells.Water travels over the surface of the land and/or through the guidelines on the appropriate means ground,dissolving naturally occurring minerals which,in some cases,include radioactive to lessen the risk of infection by materials and other substances resulting from the presence of animals or human activity. Cryptosporidium and Contaminants that might be expected in untreated water include:microbial contaminants other microbial ` such as viruses and bacteria,inorganic contaminants such as salts and metals,pesticides contaminants.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 tap water is safe to drink,the EPA I prescribes regulations limiting the amount _ Le ad L ine of certain contaminants in water provided by public water systems.The EPA establishes 503-988-4000 test methods and monitoring requirements For more information call the Safe for contaminants and requires public water Drinking Water Hotline at ► FREE lead-in-water testing systems to give public notice in the event of 1-800-426-4791 or visit the EPA's ► FREE childhood blood lead pova. ow. level testing a violation. website www.e g ► Lead poisoning prevention workshops More information about contaminants ► Programs to reduce hazards and potential health effects is available in eligible homes from the EPA's Safe Drinking Water www.leadline.org Hotline at 1-800-426-4791 or by visiting www.epa.gov/ow. 2012 Water Quahty Report • Tigard Water Service Area 7 Frequently ' • Asked / About Water , Is fluoride added to drinking Groundwater hardness is approximately 86 Q)What can 1 do about chlorine water? ppm (about 5 grains per gallon),which is taste and odor in my water? Q No.However,fluoride is a naturally considered moderately hard. #DThe simplestway to et rid of chlorine y g occurring trace element in groundwater, taste and odor is to place tap water in a and the City of Tigard has the option to take �a How can I get my water tested? container and allow it to sit for a few hours. fluoridated water from the City of Beaverton Q For information about free lead-in-water With time,the chorine dissipates and the taste in an emergency. testing call the LeadLine at 503-988-4000 and odor will be gone. or visit www.leadline.org. For more (� Is the water soft or hard? extensive testing,private laboratories can Still have questions? test your tap water for a fee.Not all labs Want to learn more about water quality Our water is very soft.The hardness is are accredited to test for all contaminants. and testing? typically 4-13 parts per million (ppm),or For information about accredited labs, approximately one-half a grain of hardness call the Oregon Department of Human Contact the Tigard Environmental per gallon.During the summer months when Services,Oregon Environmental Laboratory Program Coordinator,jennifer Joe at groundwater is blended with our surface Accreditation Program at 503-693-4122. 503-718-2599 or jennifer@tigard-orgov. water,the hardness level may increase slightly. City of Tigard PRISRT STD PUBLIC WORKS DEPARTMENT U.S.POSTAGE I N S I D E 13125 SW Hall Blvd. PAID d . � PORTLAND,OR The Purpose of this Report Tigard, OR 97223 PERMIT#1350 ► Source Information ► Tigard Water Service Area Map ► Information on Detected Contaminants ► Definitions ► 2011 Water Quality Analysis Results * * * * * * ECRWSS ► Cryptosporidium POSTAL CUSTOMER ► Lead in the Drinking Water... Are You at Risk? ► TWSA Source Water Assessment ► Important Message from the EPA ► Water and Your Health Have a question about this report? ► Frequently Asked Questions Contact Tigard Environmental Program Coordinator Jennifer Joe at 503-718-2599 or jennifer@tigard-or.gov. zHabla Espanol? I H 0 2 Este informe contiene informacibn importante acerca de su agua potable.Haga que alguien to traduzca para usted,o hable con alguien que to entienda. The J this . eport.R port. of . This report was printed on recycled paper with environmentally friendly inks. Please remember to recycle. ..� ^„ n muo.,iu�. n m 8 Tigard Water Service Area • 2012 Water Quality Report