2010 Water Quality Report

Inorganic ContaminantsDefinitionsMaximum Contaminant Level (MCL) - The highest permissible level of a contaminant indrinking water. MCLs are set as close to theMCLGs as feasible using the best availabletreatment technology.

Maximum Contaminant Level Goal (MCLG) -The level of a contaminant in drinking waterbelow which there is no known or expectedhealth risk. MCLGs allow for a margin of safety.

Maximum Residual Disinfectant Level(MRDL) - The highest level of disinfectantallowed in drinking water. There is convincingevidence 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 orexpected risk to health. MRDLGs do not reflectthe benefits of the use of disinfectants to controlmicrobial contamination.

Treatment Technique (TT) - A required processintended to reduce the level of a contaminant indrinking water.

Action Level (AL) - The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a watersystem must follow.

(MREM) - Millirems per year (a measure of radiation absorbed by the body)

NA - Not applicable.

AVG - Regulatory compliance with some MCLsare based on the running annual average of monthly samples.

About The Following

The following information lists all of the federally regulated or monitored contaminants which havebeen found in your drinking water. The U.S. EPArequires water systems to test for up to 97 contaminants.

Secondary ConstituentsMany constituents (such as calcium, sodium, or iron) which are often found in drinkingwater, can cause taste, color, and odor problems.The taste and odor constituents are called secondary constituents and are regulated by theState of Texas, not the EPA. These constituentsare not causes for health concerns. Therefore,secondaries are not required to be reported inthis document but they may greatly affect theappearance and taste of your water.

Water Sources

The sources of drinking water (both tap water andbottled water) include rivers, lakes, streams,ponds, reservoirs, springs, and wells. As watertravels over the surface of the land or through theground, it dissolves naturally-occurring minerals,and in some cases, radioactive material, and canpick up substances resulting from the presence ofanimals or from human activity. Contaminantsthat may be present in source water before treatment include: - Microbial contaminants, such as viruses andbacteria, which may come from sewage treatment plants, septic systems, agriculturallivestock operations, and wildlife.- Inorganic contaminants, such as salts and metals, which can be naturally-occurring or resultfrom urban storm water runoff, industrial ordomestic wastwater discharges, oil and gas production, mining, or farming.- Pesticides and herbicides, which may comefrom a variety of sources such as agriculture,urban storm water runoff, and residential uses.- Organic chemical contaminants, including synthetic and volatile organic chemicals, whichare by-products of industrial processes andpetroleum production, and can also come fromgas stations, urban storm water runoff, and septic systems.- Radioactive contaminants, which can be naturally-occurring or be the result of oil and gasproduction and mining activities.

AbbreviationsNTU - Nephelometric Turbidity Units

MFL - million fibers per liter (a measure of asbestos)

pCi/L - picocuries per liter (a measure of radioactivity)

ppm - parts per million, or milligrams per liter (mg/L) or one ounce in 7,350 gallons of water

ppb - parts per billion, or micrograms per liter (μg/L) or one ounce in 7,350,000 gallons of water

ppt - parts per trillion, or nanograms per liter

ppq - parts per quadrillion, or picograms per liter

Lead and Copper

Secondary and Other Constituents Not Regulated (No associated adverse health effects)

Turbidity

Total Coliform REPORTED MONTHLY TESTS FOUND NO COLIFORM BACTERIA.Fecal Coliform REPORTED MONTHLY TESTS FOUND NO FECAL COLIFORM BACTERIA.

Organic Contaminants

Unregulated Initial Distribution System Evaluation for Disinfection ByproductsWaived or not yet sampled

Health Information Regarding Lead

Maximum Residual Disinfectant Level

Disinfection Byproducts

Unregulated Contaminants

Year Average Minimum MaximumContaminant Level Level Level MCL MCLG Unit of Measure Violation Source of Contaminant

2010 Haloacetic Acids 16.6 16.6 16.6 60 * ppb N Byproduct of drinking water clorination.

2010 Total Trihalomethanes 21.8 21.8 21.8 80 * ppb N Byproduct of drinking water clorination.

* MCLG - No goal for the total.

Year Average Minimum MaximumDisinfectant Level Level Level MRDL MRDLG Unit of Measure Source of Disinfectant

2010 Chloramine 3.2 2.2 4.2 4 <4 ppm Disinfectant used to control microbes.Residual

If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines

and home plumbing. This water supply is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for several

hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking. If you are concerned about lead in your water, you may wish to have

your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at http://www.epa.gov/safewater/lead.

Year or Average Minimum MaximumRange Contaminant Level Level Level MCL MCLG Unit of Measure Source of Contaminant

2010 Fluoride 0.23 0.23 0.23 4 4 ppm Erosion of natural deposits; water additive which promotes strong teeth; discharge fromfertilizer and aluminum factories.

2010 Nitrate 0.96 0.96 0.96 10 10 ppm Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits.

Bromoform, chloroform, dichlorobromomethane, and dibromochloromethane are disinfection byproducts. There is no maximum contaminant level for these chemicals at the entry point to distribution.

Year or Average Minimum Maximum Unit ofRange Contaminant Level Level Level Measure Source of Contaminant

2010 Chloroform 14.4 14.4 14.4 ppb Byproduct of drinking water clorination.

2010 Bromodichloromethane 5.7 5.7 5.7 ppb Byproduct of drinking water clorination.

Year or Constituent Average Minimum Maximum Secondary Unit of Source of ConstituentRange Level Level Level Limit Measure

2010 Bicarbonate 48 48 48 NA ppm Corrosion of carbonate rocks such as limestone.

2010 Chloride 25.2 25.2 25.2 300 ppm Abundant naturally occurring element; used in water purification; byproduct of oil field activity.

2007 Hardness as Ca/Mg 125 125 125 NA ppm Naturally occurring calcium and magnesium.

2010 pH 8.8 8.8 8.8 >7 units Measure of corrosivity of water.

2010 Sodium 33.6 33.6 33.6 NA ppm Erosion of natural deposits; byproduct of oil field activity.

2010 Sulfate 73.3 73.3 73.3 300 ppm Naturally occurring; common industrial byproduct; byproduct of oil field activity.

2010 Total Alkalinity as CaCO3 48 48 48 NA ppm Naturally occurring soluble mineral salts.

2010 Total Dissolved Solids 235 235 235 1000 ppm Total dissolved mineral constituents in water.

Highest Single Lowest Monthly % of Year Contaminant Measurement Samples Meeting Limits Turbidity Limits Unit of Measure Source of Contaminant

2010 Turbidity 0.18 100.00 0.3 NTU Soil runoff.

Turbidity has no health effects. However, turbidity can interfere with disinfection and provide a medium for microbial growth. Turbidity may indicate the presence of disease-causing organisms. These organisms include bacteria, viruses, and parasites that can cause symptoms such as nausea, cramps, diarrhea and associated headaches.

Year Contaminant The 90th Percentile Number of Sites Exceeding Action Level Action Level Unit of Measure Source of Constituent

2010 Lead 2.6 0 15 ppb Corrosion of household plumbingsystems; erosion of natural deposits

2010 Copper 0.12 0 1.3 ppm Corrosion of household plumbingsystems; erosion of natural deposits; leaching from wood preservatives

Year or Average Minimum MaximumRange Contaminant Level Level Level MCL MCLG Unit of Measure Source of Contaminant

2010 Simazine 0.21 0.21 0.21 4 4 ppb Herbicide runoff.

2010 Atrazine 0.68 0.68 0.68 3 3 ppb Runoff from herbicide used on row crops.

The District performs a minimum of 7,150 tests per month on water quality. Parameters regularly tested during and after treatment include water temperature, turbidity, alkalinity, pH,hardness, chlorides, chloramine disinfectant level or residual, and presence or absence ofcoliform bacteria. Water temperature, tested at the start of treatment, affects the reaction efficiency for particle removal and disinfection. Turbidity is a direct measure of water clarityand reflects the effectiveness of the particle removal processes. Testing is done before treatment, after coagulation and flocculation, after sedimentation, after filtration, and as treated water leaves the plant. Alkalinity and pH are important factors in thecoagulation reaction and pH is important during disinfection, therefore these values aremeasured throughout the treatment process. Water hardness is measured to assess thelime softening process. Chlorides are monitored in raw and treated water to forewarn of anyupstream contamination and allow for appropriate treatment adjustment. Disinfectant residuals are monitored to insure adequate levels are maintained after disinfection, after filtration, as treated water leaves the plant, and out in the distribution system. Presence ofcoliform bacteria in water supplies indicates possible microbiological contamination. For thisreason, bacteriological tests are performed on water before, during and aftertreatments, and at designated locations in the distribution system. Monitoring and testingfor organic, metallic, and radioactive contaminants are performed by the TCEQ on waterentering the distribution system. Of the 97 tests required by the EPA, all constituents detected are included in this report. All detects were well below regulatory limits.

Water Treatment (Monitoring and Testing)

When drinking water meets federal standards there may not be any health benefits to purchasing bottled water or point-of-use devices.

Drinking water, including bottled water, may reasonably be expected to contain atleast small amounts of some contaminants. The presence of contaminants doesnot necessarily indicate that water poses a health risk. More information aboutcontaminants and potential health effects can be obtained by calling the U.S. Environmental Protection Agency’s Safe Drinking Water Hotline (1-800-426-4791).

The Highland Park Town Council meets the second Monday at 8:00 a.m., and thefourth Monday at 4:00 p.m., of every month, unless otherwise set by the Council. Tolearn about future public meetings concerning your drinking water or to request toschedule one, call 214-521-4161 during normal business hours, 7:30 a.m. to 4:30p.m., weekdays or come by the Town Hall, 4700 Drexel Drive, Highland Park, TX75205.

The Dallas County Park Cities Municipal Utility District is governed by a five-memberBoard of Directors elected by citizens of the Town of Highland Park and the City of University Park.

For information on water plant tours, source water protection efforts, or other questions on water quality, call 214-652-8639, or write to: Dallas County Park CitiesMunicipal Utility District, 1811 Regal Row, Dallas, TX 75235

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You may be more vulnerable than the general population to certain microbial contaminants, such as Cryptosporidium, in drinking water. Infants, some elderlyor immunocompromised persons such as those undergoing chemotherapy forcancer; those who have undergone organ transplants; those who are undergoingtreatment with steriods; and people with HIV/AIDS or other immune system disorders can be particularly at risk from infections. You should seek adviceabout drinking water from your physician or health care provider. Additionalguidelines on appropriate means to lessen the risk of infection byCryptosporidium are available from the Safe Drinking Water Hotline at (800) 426-4791.

En Español

Éste reporte incluye información

importante sobre el agua potable. Si

tiene preguntas o comentarios sobre

éste informe en español, favor de

llamar al tel. (214) 521-4161 para

hablar con una persona bilingüe

en español.

Our Drinking Water Meets or

Exceeds All Federal (EPA)

Drinking Water Requirements

This report is a summary of the quality

of the water we provide our customers.

The analysis was made by using the

data from the most recent U.S.

Environmental Protection Agency

(EPA) required tests and is presented

in the attached pages. We hope this

information helps you become more

knowledgeable about what’s in your

drinking water.

All Drinking Water May Contain Contaminants

Public Participation Opportunites

Special Notice

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The Town of Highland Park

Water Department is responsible

for providing safe and reliable

drinking water to all residents.

Our water department maintains

the distribution system that

delivers treated water to your tap.

The Texas Commission on

Environmental Quality (TCEQ)

has assessed our system and

determined that OUR WATER IS

SAFE to drink. The analysis was

made by using the data listed in

the following charts.

This report was delivered to all

Highland Park Utility Customers.

Requests for additional copies or

comments about this report may

be made to the Customer Service

Department, 214-521-4161, or in

writing to 4700 Drexel Drive,

Highland Park, TX 75205.

2010

Ann

ual D

rink

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Wat

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(Consu

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Confi

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eport

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blished June 201

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This is Your Annual

Drinking Water Quality Report J u n e 2 0 1 0

Our drinking water is obtained from one surface water source, GRAPEVINE RESERVOIR via ELMFORK OF THE TRINITY RIVER. A Source Water Susceptibility Assessment for our drinking watersource is currently being updated by the Texas Commission on Environmental Quality. The information describes the susceptibility and types of constituents that may come into contact withour drinking water source based on human activitiesand natural conditions. The information contained inthe assessment allows us and/or the system fromwhich we receive water to focus our source water protection strategies. Some of this source waterassessment information is available on Texas DrinkingWater Watch at http://dww.tceq.state.tx.us/DWW/. Formore information on source water assessments andprotection efforts at our system, please contact theDallas County Park Cities Municipal Utility District at(214) 652-8639.

Where Do We Get Our Drinking Water?