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2008
Claremont Water System
Water Quality Report
For You,
Only Our Best Will Do!
An Ongoing Commitment
to the Communities
We Serve.
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Water Quality, Customer Service and Healthy Communities
As your water service provider, Golden State Water Company (GSWC) takes itsresponsibility very seriously. Our 550 highly trained and dedicated employeeswork hard every day to deliver the highest quality water possible, as well as bestin class customer service. Water availability and conservation are important.Keeping customers inormed is, too. That is why we are pleased to presentGSWCs 2008 Water Quality Report.
GSWC maintains strict adherence to established drinking water standards. Thequality o your water routinely meets, or is better than, the standards required bythe U.S. Environmental Protection Agency, the Caliornia Department o PublicHealth and the Caliornia Public Utilities Commission. It is this commitmentto water quality and customer service that enables GSWC to deliver billions ogallons o clean, sae drinking water annually.
Similarly, to ensure water is delivered efciently, we are constantly improvingthe water production and delivery system, installing and maintaining wells,
pumps and pipelines. Our philosophy is to invest in ongoing and preventivemaintenance so that water inrastructure is kept in the best possible condition.Over the long term, this helps ensure operational costs are minimized andservice is consistent.
Ultimately, we know that water rates aect our hard-working customers. Thatis why we do everything possible to maintain air and competitive rates. GSWCis held to the highest accountability standards by the Caliornia Public UtilitiesCommission. Consumer advocates review our operations and investments to
ensure rates are commensurate with water service.
On behal o the men and women o GSWC, thank you or the opportunityto be your water provider. We will continue to work hard or you, striving orexcellence in all that we do. Please do not hesitate to contact us i you have anyquestions or eedback. Customer Service Representatives are available all day,every day, 365 days a year at (800) 999-4033 or via email [email protected].
Sincerely,
Floyd E. Wicks Alice Shiozawa
Chie Executive Ofcer Foothill District Manager
Claremont Water SyStem
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800-999-4033
About the CompanyAmerican States Water Company is an investor-owned utilitypublicly traded on the New York Stock Exchange under thetrading symbol AWR.
Through its subsidiary companies -Golden State WaterCompany and Chaparral City Water Company- AmericanStates Water Company provides water service to 1 out of 30
Californians located within 75 communities throughout10 counties in Northern, Coastal and Southern California(approximately 252,300 customers) and approximately 12,800customers in the city of Fountain Hills, Arizona and a smallportion of Scottsdale, Arizona. The Company also distributeselectricity to approximately 22,800 customers in the Big Bearrecreational area of California. Golden State Water Companyis an active contributor to the American Water WorksResearch Foundation.
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Claremont Water SyStem
1 ProtectGolden State Water Company (GSWC)understands that protecting your watersupply is o the utmost importance.The source o your water supply ismonitored on a schedule approved bythe Caliornia Department o PublicHealth (CDPH), and any activitywhich may aect this supply is closelyanalyzed. Should action becomenecessary, GSWC will use the bestavailable technology to protect yourwater supply. GSWC welcomes andencourages consumers to share in ourvigilance. I you observe any activitiesthat could possibly endanger the watersupply, contact us immediately by
calling our 24-hour customer servicecenter at (800) 999-4033.
2 MonitorTo maintain the saety and integrity oyour water supply, GSWC constantlymonitors its water sources, treatmentprocesses and distribution systemor all constituents mandated by
the United States EnvironmentalProtection Agency (USEPA) and theCDPH. In 2007, GSWCs independentlaboratories conducted approximately90,000 analyses on over 21,000samples company-wide to provide thehighest quality o water delivered toyour tap.
3 Invest
GSWCs state certifed watertreatment and distribution operatorswork diligently to ensure watertreatment processes are maintainedto the highest standards. Whenevernecessary, new technologies are
adopted to beneft our customers.Water is delivered via a complexdistribution system made up omultiple sources o supply, storageacilities, pumps, pipes, valves, meters,and countless other components toprovide sae water to your tap. GSWCcareully monitors the system andinvests annually to ensure it is kept
in top condition, minimizing the risko major problems which are costly torepair.
4 ServeThe quality o GSWCs customerservice is just as important as thewater itsel. We pride ourselves onproviding best in class service and
personal assistance 24 hours a day,seven days a week, 365 days a year. Weare able to accomplish this by hiringthe best and brightest men and womenand by providing ongoing support andtraining to all employees. All GSWCemployees share a commitment toprovide the best possible service.
Delivering Excellence, One Drop at a TimeGSWCs Water Philosophy
Protect, Monitor, Invest, Serve
PROTECT
MONITO
R
INVEST
SERVE
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Where Does My WaterCome From?Water delivered to customers in theClaremont System is purchased waterrom the Three Valleys MunicipalWater District (TVMWD) andgroundwater pumped rom the Chino,Pomona, and Upper Claremont Heightsgroundwater basins. The Chino Basin issoutheast o the San Jose ault, south othe San Gabriel Mountains, and north
o the Santa Ana River. The Pomonabasin is northwest o the San Jose ault,east o the San Jose Hills and south oIndian Hill ault. The Upper ClaremontHeights Basin is north o FoothillBoulevard and east o Indian Hill Blvd.in northern Claremont.
For People with SensitiveImmune Systems . . .Cryptosporidium is a microbialpathogen ound in surace waterthroughout the U.S. When ingested,the organism may cause nausea,diarrhea, and other gastrointestinalsymptoms. The organism comes romanimal wastes and may be in suracewatersheds. Surace water is purchasedrom Metropolitan Water District o
Southern Caliornia (MWDSC), whichtested or cryptosporidium in 2007and did not detect it in the water. Idetected, cryptosporidium is eliminatedby an eective treatment combinationincluding sedimentation, fltration anddisinection.
CON
DEN
SAT I
ON
P R E C I P I T A T I O N
OC E ANWATERTABLE
L A K E
SURFACE RUNO
FF
S T R E AM FLOWP
ERC
O
L
AT
I
ON
T R A N S P I R A T I O N
E V A P O R A T I O N
G R O U N D W AT E R F L O W
5
800-999-4033
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Claremont Water SyStem
Some people may be more vulnerableto contaminants in the water thanthe general population. Immuno-compromised persons, such as personswith cancer undergoing chemotherapy,
persons who have undergone organtransplants, people with HIV/AIDSor other immune system disorders,some elderly, and infants can beparticularly at risk of infections.These people should seek advice fromtheir healthcare providers about theirdrinking water.
The USEPA and the Centers forDisease Control (CDC) guidelineson appropriate means to lessen therisk of infection by Cryptosporidiumand other microbial contaminantsare available from the USEPAs SafeDrinking Water Hotline at(800) 426-4791.
Risk to Tap and BottledWaterDrinking water, including bottledwater, may reasonably be expectedto contain at least small amounts ofsome contaminants. The presence ofcontaminants does not necessarilyindicate that water poses a health risk.More information about contaminantsand potential health effects can beobtained by calling the USEPAsSafe Drinking Water Hotline at (800)426-4791.
The sources of drinking water(both tap water and bottled water)include rivers, lakes, streams, ponds,reservoirs, springs, and wells. As watertravels over the surface of the land orthrough the layers in the ground, itdissolves naturally occurring mineralsand, in some cases, radioactivematerial, and can pick up substancesresulting from the presence of animalor human activity.
In order to ensure that tap water issafe to drink, the USEPA and theCalifornia Department of PublicHealth (CDPH) prescribe regulationsthat limit the amount of certain
contaminants in water providedby public water systems. CDPHregulations also establish limits forcontaminants in bottled water thatmust provide the same protection forpublic health.
Contaminants inDrinking Water Sources
May Include:
Microbialcontaminants,suchasviruses and bacteria, which maycome from sewage treatmentplants, septic systems, agriculturallivestock operations, and wildlife.
Inorganiccontaminants,suchassalts and metals, which can benaturally-occurring or result fromurban storm water runoff, industrialor domestic wastewater discharges,oil and gas production, mining, orfarming.
Pesticidesandherbicides,thatmaycome from a variety of sources suchas agriculture, urban storm waterrunoff, and residential uses.
Organicchemicalcontaminants,including synthetic and volatileorganic chemicals, which areby-products of industrial processesand petroleum production, and canalso, come from gas stations, urbanstorm water runoff, agriculturalapplication, and septic systems.
Radioactivecontaminants,thatcan
be naturally occurring or be theresult of oil and gas production andmining activities.
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Claremont Water System - Source Water Quality
Primary Standards -Health Based (units)
PRIMARYMCL
PHG(MCLG)
Range oDetection
AverageLevel
MCLViolation?
Most RecentSampling
Date
Typical Source oConstituent
Turbidity
Highest singlemeasurement o theTreated Surace Water(NTU)
TT = 1.0 n/a n/a 0.08 No 2007 Soil runo
Lowest Percent o allMonthly Readings lessthan 0.3 NTU (%)
TT = 95 n/a n/a 100% No 2007 Soil runo
Inorganic Constituents
Arsenic (ug/L) 10 0.004 ND - 2.7 ND No 2007
Erosion o natural
deposits; runo romorchards, glass andelectronics production
wastes
Fluoride (mg/L) 2.0 1 ND - 0.87 0.18 No 2007
Erosion o naturaldeposits; water additive
that promotes strongteeth; discharge rom
ertilizer and aluminumactories
Nitrate [as NO3] (mg/L) 45 45 4.3 - 42 19 No 2007
Runo and leachingrom ertilizer use;
leaching rom septictanks and sewage;erosion o natural
deposits
Selenium (ug/L) 50 (50) ND - 8.7 ND No 2007
Discharge rompetroleum,
glass, and metalrefneries; erosiono natural deposits;
discharge rommines and chemical
manuacturers; runorom livestock lots (eed
additive)
Volatile Organic Constituents
1,1-Dichloroethylene(ug/L)
6 10 ND - 2.2 ND No 2007Discharge rom
industrial chemicalactories
Radioactive Constituents
Uranium (pCi/L) 20 0.43 1.7 - 3.6 2.6 No 2007Erosion o natural
deposits
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Claremont Water System - Source Water Quality
Secondary Standards -Aesthetic (units)
SECONDARYMCL
PHG(MCLG)
Range oDetection
AverageLevel
MCLViolation?
Most RecentSampling
Date
Typical Source oConstituent
Color (units) 15 n/a ND - 5 ND No 2007Naturally-occurringorganic materials
Chloride (mg/L) 500 n/a 3 - 81 48 No 2007Runo/leaching rom
natural deposits;seawater infuence
Copper (mg/L) 1 n/a ND - 0.08 ND No 2007
Internal corrosion ohousehold plumbing
systems; erosiono natural deposits;leaching rom wood
preservatives
Foaming Agents [MBAS](ug/L)
500 n/a ND - 120 ND No 2007Municipal and industrial
waste discharges
Specic Conductance(uS/cm) 1600 n/a 280 - 590 439 No 2007
Substances that orm
ions when in water;seawater infuence
Sulate (mg/L) 500 n/a 20 - 55 39 No 2007Runo/leaching rom
natural deposits;industrial wastes
Turbidity (units) 5 n/a ND - 0.4 0.1 No 2007 Soil runo
Total Dissolved Solids(mg/L)
1000 n/a 200 - 440 286 No 2007Runo/leaching rom
natural deposits
Zinc (mg/L) 5 n/a ND - 0.06 ND No 2007Runo/leaching rom
natural deposits;industrial wastes
Unregulated ConstituentsRequiring Monitoring(units)
NoticationLevel
PHG(MCLG)
Range oDetection
AverageLevel
MCLViolation?
Most RecentSampling
Date
Boron (ug/L) 1000 n/a ND -192 ND n/a 2007
Chromium, Hexavalent[CrVI] (ug/L)
n/a n/a ND - 9.8 6.7 n/a 2007
Vanadium (ug/L) 50 n/a ND - 9.9 1.9 n/a 2007
Other Parameters (units)Notication
LevelPHG
(MCLG)Range oDetection
AverageLevel
MCLViolation?
Most RecentSampling
Date
Alkalinity (mg/L) n/a n/a 60 - 210 121 n/a 2007
Calcium (mg/L) n/a n/a 23 - 78 42 n/a 2007
Hardness [as CaCO3](mg/L)
n/a n/a 45 - 270 147 n/a 2007
The sum of polyvalent
cations present in
the water, generally
magnesium and calcium.
The cations are usually
naturally-occurring.
Hardness [as CaCO3](grains/gal)
n/a n/a 2.6 - 16.0 8.6 n/a 2007
Magnesium (mg/L) n/a n/a 3.9 - 18.0 12.4 n/a 2007
pH (pH units) n/a n/a 7.6 - 8.5 8.1 n/a 2007
Potassium (mg/L) n/a n/a 1.4 - 3.7 3 n/a 2007
Radon (pCi/L) n/a n/a ND - 668 205 n/a 2007
Sodium (mg/L) n/a n/a 7 - 43 30 n/a 2007
Reers to the saltpresent in the water and
is generally naturallyoccurring.
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Claremont System - Distribution Water Quality
MicrobiologicalConstituents(units)
PRIMARYMCL
PHG(MCLG)
ValueMCL
Violation?
Most RecentSampling
Date
Typical Source ofConstituent
Total Coliform Bacteria40 Samples/Month(Present / Absent)
No more than5% of monthlysamples are
positive
(0)Highest Percent of monthly
samples positive was1.5 %
No 2007Naturally present in the
environment
Disinfection Byproductsand DisinfectantResiduals (units)
PRIMARYMCL
(MRDL)
PHG(MRDLG)
Range ofDetection
Highest4-QuarterlyAverage
MCLViolation?
Most RecentSampling
Date
Typical Source ofConstituent
Chlorine [as Cl2] (mg/L) (4.0) (4) 0.06 - 3.3 1.9 No 2007Drinking water
disinfectant added fortreatment
HAA5 [Total of FiveHaloacetic Acids] (ug/L)
60 n/a ND - 27 13 No 2007Byproduct of drinking
water disinfection
TTHMs [Total of FourTrihalomethanes] (ug/L)
80 n/a ND - 60 39 No 2007Byproduct of drinking
water chlorination
Inorganic Constituents(units)
ACTIONLEVEL
PHG(MCLG)
SampleData
90th %Level
MCLViolation?
Most RecentSampling
Date
Typical Source ofConstituent
Copper (mg/L) 1.3 0.17
None of the31 samplescollectedexceededthe action
level.
0.27 No 2005
Internal corrosion ofhousehold plumbing
systems; erosionof natural deposits;leaching from wood
preservatives.
Lead (ug/L) 15 2
None of the31 samples
collectedexceededthe action
level.
4.7 No 2005
Internal corrosion ofhousehold plumbing
systems; dischargesfrom industrialmanufactures; erosion
of natural deposits.
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Claremont Water SyStem
Laboratory AnalysesOver the years we have taken
thousands of water samples in orderto determine the presence of anyradioactive, biological, inorganic,volatile organic or synthetic organiccontaminants in your drinking water.The enclosed table shows only thosecontaminants that were detected inthe water.
Although all of the substanceslisted here are under the MaximumContaminant Level (MCL), we feel itis important that you know exactlywhat was detected and how much ofthese substances were present in thewater. Compliance (unless otherwisenoted) is based on the average level ofconcentration being below the MCL.The state allows us to monitor forsome contaminants less than once peryear because the concentrations do notchange frequently. Some of our data,though representative, is more than ayear old.
Unregulated contaminant monitoringhelps USEPA and the CaliforniaDepartment of Public Health to
determine where certain contaminantsoccur and whether the contaminantsneed to be regulated.
ChloraminationThe water imported from Three
Valleys Municipal Water District(TVMWD) contains chloramine.Chloramine is added to the waterfor public health protection.Chloraminated water is safe for peopleand animals to drink, and for all othergeneral uses.
Three special user groups including
kidney dialysis patients, aquariumowners, and businesses or industriesthat use water in their treatmentprocess must remove chloramine fromthe water prior to use.
Hospitals or dialysis centers shouldbe aware of chloramine in the waterand should install proper chloramine
removal equipment, such as dualcarbon adsorption units.
Aquarium owners can use readilyavailable products to remove orneutralize chloramine.
Businesses and industries that usewater in any manufacturing processor for food or beverage preparationneed to be aware of a change inwater disinfectant from chlorine tochloramine. Chloramination mayrequire companies to adjust or upgradetheir current treatment system.Businesses should contact their watertreatment equipment supplier todetermine if chloramine could impacttheir system.
Should you have any questions orconcerns regarding chloramine in yourwater, please contact TVMWD at(909) 621-5568.
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NitrateNitrate in drinking water at levels
above 45 mg/L is a health risk orinants o less than six months oage. Such nitrate levels in drinkingwater can interere with the capacityo the inants blood to carry oxygen,resulting in a serious illness;symptoms include shortness o breathand blueness o skin. Nitrate levelsabove 45 mg/L may also aect the
ability o the blood to carry oxygen,in other individuals, such as pregnantwomen and those with certain specicenzyme deciencies. I you are caringor an inant, or you are pregnant, youshould ask advice rom your healthcare provider.
RadonRadon is a radioactive gas oundthroughout the United States thatcant be seen, tasted or smelled. It canmove up through the ground and intoa home through cracks and holes inthe oundation and can build up tohigh levels. Radon can get into indoorair when released rom tap water romshowering, washing dishes, and other
household activities. Radon enteringthe home through tap water will, inmost cases, be a small source in indoorair as compared to radon entering thehome through soil. Radon is a knownhuman carcinogen and breathing aircontaining radon can lead to lungcancer. Drinking water containingradon may cause increased risk o
stomach cancer. I you are concernedabout radon, testing the air in yourhome is inexpensive and easy. Forinormation call the USEPAs RadonHotline at (800) SOS-RADON.
TurbidityTurbidity is a measure o the
cloudiness o the water. It is monitoredbecause it is a good indicator othe eectiveness o surace waterltration.
FluoridationMWDSC, one o GSWCs sources owater supply began fuoridating water
late in 2007. Customers receivingwater rom MWDSC will see nodierence in the taste, color or odor otheir water as a result o fuoridation.Fluoridation will not change theway you normally use water orsh, pets, or cooking. Children whoreceive fuoride supplements shouldconsult their doctor or dentist. Forinormation regarding fuoridation oyour water, please contact MWDSC at(213) 217-6850, option 2.
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Claremont Water SyStem
partspermillion(ppm)or milligrams per liter(mg/L)
partsperbillion(ppb)or micrograms per liter
(g/L)
partspertrillion(ppt)or nanograms per liter(ng/L)
Grainspergallon(grains/gal) Ameasurement o waterhardness oten used orsizing household water
soteners. One grainper gallon is equal to17.1 mg/L o hardness.
MicroSiemenspercentimeter (S/cm) A measurement o asolutions ability toconduct electricity.
NephelometricTurbidity Units (NTU) A measurement othe clarity o water.Turbidity in excess o
5 NTU is noticeable tothe average person.
PicoCuriesperliter (pCi/L) Ameasurement oradioactivity in water.
42 gallons(large bathtub)
14,000 gallons(average swimming
pool)
14,000,000 gallons(average lake)
Measurements
To ensure the best possible quality, water is sampled and tested
consistently throughout the year.
Contaminants are measured in:
Parts per million:
1 drop in 14 gallons
1 second in 12 days
1 inch in 16 miles
Parts per billion:
1 drop in 14,000 gallons
1 second in 32 years
1 inch in 16,000 miles
Parts per trillion:
1 second in 32,000years
1 inch in 16 millionmiles
10 drops in enoughwater to fll the RoseBowl
I this is difcult to imagine, think about these comparisons:
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Glossary of Terms
Maximum Contaminant Level (MCL)The highest level of a contaminantthat is allowed in drinking water.Primary MCLs are set as close to thepublic health goals and maximumcontaminant level goals as iseconomically and technologicallyfeasible. Secondary MCLs are set toprotect the odor, taste and appearance
of drinking water.
Caliornia Notifcation Level (NL)Non-regulatory, health-based advisorylevels established by the CaliforniaDepartment of Public Health (CDPH)for contaminants in drinking waterfor which an MCL has not beenestablished.
Maximum Contaminant Level Goal(MCLG)The level of contaminant in drinkingwater below which there is no knownor expected risk to health. Maximumcontaminant level goals are set bythe U.S. Environmental ProtectionAgency (USEPA).
Maximum Residual DisinectantLevel (MRDL)The level of a disinfectant added forwater treatment that may not beexceeded at the consumers tap.
Maximum Residual DisinectantLevel Goal (MRDLG)The level of a disinfectant added forwater treatment below which thereis no known or expected health risk.MRDLGs are set by the USEPA.
Primary Drinking Water Standard(PDWS)
MCLs and MRDLs for contaminantsthat affect health along withtheir monitoring and reportingrequirements, and water treatmentrequirements.
Public Health Goal (PHG)The level of a contaminant indrinking water below which there is
no known or expected risk to health.Public health goals are set by theCalifornia Environmental ProtectionAgency (CalEPA).
Regulatory Action Level (AL)The concentration of a contaminantwhich, if exceeded, triggers treatmentor other requirements that a watersystem must follow.
Treatment Technique (TT)A required process intended toreduce the level of a contaminant indrinking water.
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Claremont Water SyStem
Source Water Assessment
A source water assessment was conductedor each o the groundwater wells serving thecustomers o GSWC Claremont System inNovember 2001.
10 o the 20 (total groundwater wells) sources are
considered most vulnerable to one or more o theollowing activities, which have been associatedwith contaminants that have been detected inthe water supply:
Septicsystemshighdensity,chemical/petroleum processing/storage, photoprocessing/printing, hardware/lumber/partsstores
All o the 20 sources are also considered mostvulnerable to one or more o the ollowingpossible contaminating activities. Contaminantsassociated with these activities have not been detected in the water supply:
Abovegroundstorage,Housinghighdensity,Parkinglots/malls,Transportation corridors railroads, Transportation corridors reeways/statehighways, drinking water plants, wells water supply, dry cleaners, parks,home manuacturing, wastewater treatment plants, lumber processing andmanuacturing, mining sand/gravel, automobile gas stations
A copy o the assessment may be viewed at:CDPH Los Angeles District Ofce or GSWC Claremont System1440 W. Temple Street 401 S San Dimas Canyon RoadLos Angeles, CA 90026 San Dimas, CA 91773
You may request a summary o the assessment be sent to you by contacting:DPH Los Angeles District Ofce at (213) 580-5743
For more details or inormation contact:Stacey Roberts at (800) 999-4033
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Cross ConnectionControl ProgramGSWCs Cross Connection ControlProgram provides a level o certaintythat the water in your distributionsystem is protected rom possiblebackfow o contamination sourcesrom within commercial and/orindustrial customers premises. Foranswers to commonly asked questionsand additional inormation please visitthe cross connection control website atwww.aswater.com/xconnect.
If You Have QuestionsContact UsFor inormation about your waterquality or to nd out about upcomingopportunities to participate in publicmeetings, please contact StaceyRoberts, Water Quality Engineer,at (800) 999-4033. Visit us online atwww.aswater.com or e-mail us [email protected].
Este inorme contiene inormacinmuy importante sobre su agua de beber.Tradzcalo o hable con alguien que loentienda bien.
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PresortedStan
dard
U.S.
Postage
PAID
Pasa
dena,
CA
PermitNo.
1132
GoldenState
WaterCompany
401S.SanDimasCanyonRoad
SanDimas,C
A91773
WarmWeatherTips
Approximately50-70%o
f
ouseholdwaterisused
utdoorsforwateringlawns
ndgardens,somakethemo
st
fthewateryouuse.Never
waterduringthehottesttim
es
fthedayorwhenitswindy
.
Byplantinggrassesand
shrubsthatuselittlewater,
youcanreduceyourwatering
byupto50%.Logonto
www.b
ewaterwise.c
om
forali
st
ofwater-wiseplants.
Whenlandscaping,usepla
nts
thatrequirelittlewater.You
candecoratecreativelywit
h
interestingobjectsthatneed
nowateratall,suchasrocks,
bricks,benches,gravel,and
deckareas.
Hosingdownyourdrivewa
y
for5minuteswastes
25gallonsofwater.Clean
itwithabroomorblower
instead.
Waterlawnsandgardenso
nce
aweek.Theyonlyneed2.5
centimetersofwaterawee
k,
includingrainfall.