High Gabriel Water Supply Corporation, Leander, Texas, USA

2015 Consumer Confidence Report
Annual Drinking Water Quality Report - 2015

TX2460027

High Gabriel WSC


Annual Water Quality Report for the period of
January 1 to December 31, 2015

For more information regarding this report contact:

This report is intended to provide you with important information about your drinking water and the efforts made by the water system to provide safe drinking water.

Name: Terry Tuttle, HGWSC
Phone: 512-259-3888 or 512-589-7031


HIGH GABRIEL WSC is Ground Water (GW)

Este reporte incluye información importante sobre el agua para tomar. Para asistencia en español, favor de llamar al telefono (512) 259-3888.


Sources of Drinking Water

The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally-occurring minerals and, in some cases, radioactive material, and can pickup substances resulting from the presence of animals or from human activity.

Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the EPAs Safe Drinking Water Hotline at (800) 426-4791.

Contaminants that may be present in source water include:

- Microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.

- Inorganic contaminants, such as salts and metals, which can be naturally-occurring or result from urban storm water runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming.

- Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban storm water runoff, and residential uses.

- Organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also come from gas stations, urban storm water runoff, and septic systems.

- Radioactive contaminants, which can be naturally-occurring or be the result of oil and gas production and mining activities.

In order to ensure that tap water is safe to drink, the EPA prescribes regulations which limit the amount of certain contaminants in water provided by public water systems. FDA regulations establish limits for contaminants in bottled water, which must provide the same protection for public health.

Contaminants may be found in drinking water that may cause taste, color, or odor problems. These types of problems are not necessarily causes for health concerns. For more information on taste, odor, or color of drinking water, please contact the system's business office.

You may be more vulnerable than the general population to certain microbial contaminants, such as Cryptosporidium, in drinking water. Infants, some elderly, or immunocompromised persons such as those undergoing chemotherapy for cancer; persons who have undergone organ transplants; those who are undergoing treatment with steroids; and people with HIV/AIDS or other immune system disorders, can be particularly at risk from infections. You should seek advice about drinking water from your physician or health care providers. Additional guidelines on appropriate means to lessen the risk of infection by Cryptosporidium are available from the Safe Drinking Water Hotline at (800-426-4791).

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. We are responsible for providing high quality drinking water, but we 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.



Information about Source Water Assessments

The TCEQ completed an assessment of your source water and results indicate that some of your sources are susceptible to certain contaminants. The sampling requirements for your water system are based on this susceptibility and previous sample data. Any detections of these contaminants may be found in this Consumer Confident Report. For more information on source water assessments and protection efforts at our system, contact Terry Tuttle, High Gabriel WSC, (512) 259-3888.

For more information about your sources of water, please refer to the Source Water Assessment Viewer available at the following URL: http://tceq.state.tx.us/drinkingwater/SWAP/index_swa.html

Further details about sources and source-water assessments are available in Drinking Water Watch at the following URL: http://tceq.state.tx.us/agency/public_main.html


High Gabriel WSC obtains its water from the Trinity Aquifer, via wells located in the High Gabriel Estates subdivision, located two miles north of the city of Leander in Williamson County, Texas.


Source Water Name

 

Type of Water

Report Status

Location

1 - SIGNAL HILL DR

LEANDER, TEXAS

GW

-----

WILLIAMSON COUNTY, TEXAS

3 - EMERGENCY WELL

LEANDER, TEXAS

GW

-----

WILLIAMSON COUNTY, TEXAS



2015

Regulated Contaminants Detected


Water Quality Test Results

Definitions:

The following tables contain scientific terms and measures, some of which may require explanation.

Avg:

Regulatory compliance with some MCLs are based on running annual average of monthly samples.

Maximum Contaminant Level or 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 or MCLG:

The level of a 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 or 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 or MRDLG:

The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.

MFL

million fibers per liter (a measure of asbestos)

na:

not applicable.

NTU

nephelometric turbidity units (a measure of turbidity)

pCi/L

picocuries per liter (a measure of radioactivity)

ppb:

micrograms per liter or parts per billion - or one ounce in 7,350,000 gallons of water.

ppm:

milligrams per liter or parts per million - or one ounce in 7,350 gallons of water.

ppt

parts per trillion, or nanograms per liter (ng/L)

ppq

parts per quadrillion, or picograms per liter (pg/L)


Regulated Contaminants


Disinfectant Residuals

Disinfectant

Collection Date

Average Level

Minimum Level

Maximum Level

MRDL

MRDLG

Unit of Measure

Violation

Likely Source of Contamination

Free Chlorine

1/1/15 - 3/31/15

0.80

0.22

1.26

4.0

‹ 4.0

ppm

N

Water additive used to control microbes.

Free Chlorine

4/1/15 - 6/30/15

0.82

0.21

1.48

4.0

‹ 4.0

ppm

N

Water additive used to control microbes.

Free Chlorine

7/1/15 - 9/30/15

1.0

0.71

1.31

4.0

‹ 4.0

ppm

N

Water additive used to control microbes.

Free Chlorine

10/1/15 - 12/31/15

0.87

0.24

1.28

4.0

‹ 4.0

ppm

N

Water additive used to control microbes.

Free Chlorine

2015 (average for all four quarters)

0.87

0.35

1.33

4.0

‹ 4.0

ppm

N

Water additive used to control microbes.


Disinfectants and Disinfection By-Products

Collection Date

Highest Level Detected

Range of Levels Detected

MCLG

MCL

Units

Violation

Likely Source of Contamination

Total Trihalomethanes (TTHM)

08/06/2013

3.26

3.26 - 3.26

No goal for the total

80

ppb

N

By-product of drinking water disinfection.


Inorganic Contaminants

Collection Date

Highest Level Detected

Range of Levels Detected

MCLG

MCL

Units

Violation

Likely Source of Contamination

Barium

05/01/2014

0.0846

0.0846 - 0.0846

2

2

ppm

N

Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits.

Fluoride

2015

0.78

0.78 - 0.78

4

4.0

ppm

N

Erosion of natural deposits; Water additive which promotes strong teeth; Discharge from fertilizer and aluminum factories.

Nitrate (measured as Nitrogen)

2015

0.04

0.04 - 0.04

10

10

ppm

N

Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits.


Radioactive Contaminants

Collection Date

Highest Level Detected

Range of Levels Detected

MCLG

MCL

Units

Violation

Likely Source of Contamination

Beta/photon emitters

2015

15.5

15.5 - 15.5

0

50

pCi/L*

N

Decay of natural and man-made deposits.

*EPA considers 50 pCi/L to be the level of concern for beta particles.

Combined Radium 226/228

2015

3.6

3.6 - 3.6

0

5

pCi/L

N

Erosion of natural deposits.

Gross alpha excluding radon and uranium

2015

11.3

11.3 - 11.3

0

15

pCi/L

N

Erosion of natural deposits.


Volatile Organic Contaminants

Collection Date

Highest Level Detected

Range of Levels Detected

MCLG

MCL

Units

Violation

Likely Source of Contamination

Xylenes

2015

0.0014

0.0009-0.0014

10

10

ppm

N

Discharge from petroleum factories; Discharge from chemical factories.


Violations Table

Consumer Confidence Rule

The Consumer Confidence Rule requires community water systems to prepare and provide to their customers annual consumer confidence reports on the quality of the water delivered by the systems.

Violation Type

Violation Begin

Violation End

Violation Explanation

CCR REPORT

07/01/2015

2015

We failed to provide to you, our drinking water customers, an annual report that informs you about the quality of our drinking water and characterizes the risks from exposure to contaminants detected in our drinking water.


Lead and Copper Rule

The Lead and Copper Rule protects public health by minimizing lead and copper levels in drinking water, primarily by reducing water corrosivity. Lead and copper enter drinking water mainly from corrosion of lead and copper containing plumbing materials.

Violation Type

Violation Begin

Violation End

Violation Explanation

FOLLOW-UP OR ROUTINE TAP M/R (LCR)

10/01/2011

2015

We failed to test our drinking water for the contaminant and period indicated. Because of this failure, we cannot be sure of the quality of our drinking water during the period indicated.

FOLLOW-UP OR ROUTINE TAP M/R (LCR)

10/01/2013

2015

We failed to test our drinking water for the contaminant and period indicated. Because of this failure, we cannot be sure of the quality of our drinking water during the period indicated.

FOLLOW-UP OR ROUTINE TAP M/R (LCR)

10/01/2014

2015

We failed to test our drinking water for the contaminant and period indicated. Because of this failure, we cannot be sure of the quality of our drinking water during the period indicated.

FOLLOW-UP OR ROUTINE TAP M/R (LCR)

10/01/2015

2015

We failed to test our drinking water for the contaminant and period indicated. Because of this failure, we cannot be sure of the quality of our drinking water during the period indicated.


Public Notification Rule

The Public Notification Rule helps to ensure that consumers will always know if there is a problem with their drinking water. These notices immediately alert consumers if there is a serious problem with their drinking water (e.g., a boil water emergency).

Violation Type

Violation Begin

Violation End

Violation Explanation

PUBLIC NOTICE RULE LINKED TO VIOLATION

02/13/2014

2015

We failed to adequately notify you, our drinking water consumers, about a violation of the drinking water regulations.

PUBLIC NOTICE RULE LINKED TO VIOLATION

08/19/2014

2015

We failed to adequately notify you, our drinking water consumers, about a violation of the drinking water regulations

PUBLIC NOTICE RULE LINKED TO VIOLATION

02/13/2015

2015

We failed to adequately notify you, our drinking water consumers, about a violation of the drinking water regulations


Public Participation Opportunities

To learn about future public meetings (concerning your drinking water), or to request to schedule one, please call us at 512-259-3888. The next public meeting of the High Gabriel WSC Board of Directors is on August 8, 2016 at 7:00pm at VFW Post 10427, 8760 RR2243 East in Leander, Texas. Regular meetings are scheduled throughout the year on the second Monday of each month.



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