Quality REPORT. annual. Presented By SJWTX North Point Subdivision. Water Testing Performed in 2017 PWS ID#:

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1 annual WATER Quality REPORT Water Testing Performed in 2017 Presented By SJWTX North Point Subdivision Este reporte incluye informacion importante sobre el agua para tomar. Para asistencia en español, favor de llamar al telefono (830) PWS ID#:

2 From the General Manager Please take a few minutes to look over our 2017 Consumer Confidence Report. We are proud of our continued efforts to be good stewards of the environment and to provide safe, reliable drinking water to our community. When it comes to water quality, a primary factor in water quality is the type of water source. Generally, ground water is harder and contains more natural minerals than surface water. Surface water typically contains small levels of natural organic substances and requires treatment by filtration. CLWSC uses both ground water and surface water sources to serve its customers. Regardless of the source, we disinfect the water with chlorine and maintain a minimum level of chlorine residual throughout the distribution system to ensure the water is safe for use. In addition to disinfection, CLWSC conducts a variety of on-going sampling measures to ensure the water is safe. In 2017, we sampled for more than 190 regulated and unregulated constituents, many of which are not represented in the report because they were not detected. For those that are in the report, you ll find the highest and lowest detection values. It is important to note that detection of a substance does not necessarily make the water unsafe. Natural waters, including the sources used by CLWSC, contain a wide range of naturally occurring substances at levels that that are not harmful to human health. In fact, some of the minerals measured and detected are essential for good health. In 2016, we began the second round of sampling for the Long Term 2 Enhanced Surface Water Treatment Rule (LT2). This Environmental Protection Agency (EPA) program requires LT2 sampling for water systems that treat surface water. Under this program CLWSC surface water sources are sampled for Cryptosporidium and E-coli once per month for 24 consecutive months, ending in late The results so far have been favorable with no detection of Cryptosporidium. In 1996 the Safe Drinking Water Act was amended to add the Unregulated Contaminant Monitoring Rule (UCMR). Under the UCMR, every five years the EPA issues a list of up to 30 unregulated contaminants that must be monitored by public water systems. The fourth round of UCMR monitoring will begin in 2018 and will continue into These are just some of the ways CLWSC is working to keep the water in our community safe. We will continue to be proactive in ensuring safe water quality for all our customers in the coming year. Quality First Once again, we are pleased to present our annual water quality report. As in years past, we are committed to delivering the best-quality drinking water possible. To that end, we remain vigilant in meeting the challenges of new regulations, source water protection, water conservation, and community outreach and education while continuing to serve the needs of all our water users. Thank you for allowing us the opportunity to serve you and your family. We encourage you to share your thoughts with us on the information contained in this report. After all, well-informed customers are our best allies. Important Health Information 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)

3 Substances That Could Be in 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 pick up 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 EPA s Safe Drinking Water Hotline at (800) 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 that 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. Count on Us Water treatment is a complex, time-consuming process. Public Participation Opportunities None scheduled at this time. To learn about future public meetings, please contact us at (830) Delivering high-quality drinking water to our customers involves far more than just pushing water through pipes. Water treatment is a complex, time-consuming process. Because tap water is highly regulated by state and federal laws, water treatment plant and system operators must be licensed and are required to commit to longterm, on-the-job training before becoming fully qualified. Our licensed water professionals have a basic understanding of a wide range of subjects, including mathematics, biology, chemistry, and physics. Some of the tasks they complete on a regular basis include: Operating and maintaining equipment to purify and clarify water; Monitoring and inspecting machinery, meters, gauges, and operating conditions; Conducting tests and inspections on water and evaluating the results; Maintaining optimal water chemistry; Applying data to formulas that determine treatment requirements, flow levels, and concentration levels; Documenting and reporting test results and system operations to regulatory agencies; and Serving our community through customer support, education, and outreach. So, the next time you turn on your faucet, think of the skilled professionals who stand behind each drop. Questions? For more information about this report, or for any questions relating to your drinking water, please contact Chelsea Hawkins, Water Quality Specialist, at (830)

4 Where Does My Water Come From? The source of drinking water used by SJWTX North Point Subdivision is ground water that comes from the Trinity Aquifer. SOURCE NAME SOURCE WATER TYPE OF WATER REPORT STATUS TCEQ SOURCE ID North Point Trinity Aquifer Groundwater Active G A / G B Further details about sources and source water assessments are available in Drinking Water Watch at the following URL: Lead in Home Plumbing 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 Source Water Assessment Source Water Susceptibility Assessment for your drinking water source(s) is currently being updated by the Texas A Commission on Environmental Quality. This information describes the susceptibility and types of constituents that may come into contact with your drinking water source based on human activities and natural conditions. The information contained in the assessment allows us to focus source water protection strategies. SYSTEM SUSCEPTIBILITY SUMMARY ASBESTOS CYANIDE METALS MICROBIAL MINERALS RADIO- CHEMICAL SYNTHETIC ORGANIC CHEMICALS DISINFECTION BYPRODUCT VOLATILE ORGANIC CHEMICALS DRINKING WATER CONTAMINANT CANDIDATE Medium High Medium High High High High High For more information about your sources of water, please refer to the Source Water Assessment Viewer available at the following URL: OTHER

5 Test Results Our water is monitored for many different kinds of substances on a very strict sampling schedule. The information in the data tables shows only those substances that were detected between January 1 and December 31, Remember that detecting a substance does not necessarily mean the water is unsafe to drink; our goal is to keep all detects below their respective maximum allowed levels. The State recommends monitoring for certain substances less than once per year because the concentrations of these substances do not change frequently. In these cases, the most recent sample data are included, along with the year in which the sample was taken. REGULATED S SAMPLED MCL [MRDL] MCLG [MRDLG] LOW-HIGH VIOLATION TYPICAL SOURCE Alpha Emitters (pci/l) No Erosion of natural deposits Barium (ppm) No Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits Beta/Photon Emitters 1 (pci/l) No Decay of natural and man-made deposits Chlorine (ppm) 2017 [4] [4] No Water additive used to control microbes Combined Radium (pci/l) No Erosion of natural deposits Fluoride (ppm) No Erosion of natural deposits; Water additive that promotes strong teeth; Discharge from fertilizer and aluminum factories Haloacetic Acids [HAA] (ppb) NA No By-product of drinking water disinfection Nitrate (ppm) No Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits TTHMs [Total Trihalomethanes] (ppb) NA No By-product of drinking water disinfection Uranium (ppb) No Erosion of natural deposits Tap water samples were collected for lead and copper analyses from sample sites throughout the community SAMPLED AL MCLG (90TH%TILE) SITES ABOVE AL/TOTAL SITES VIOLATION TYPICAL SOURCE Copper (ppm) /5 No Erosion of natural deposits; Leaching from wood preservatives; Corrosion of household plumbing systems Lead (ppb) /5 No Corrosion of household plumbing systems; Erosion of natural deposits 1 The MCL for beta particles is 4 mrem/year. The U.S. EPA considers 50 pci/l to be the level of concern for beta particles. Definitions AL (Action Level): The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow. µs/cm (microsiemens per centimeter): A unit expressing the amount of electrical conductivity of a solution. LRAA (Locational Running Annual Average): The average of sample analytical results for samples taken at a particular monitoring location during the previous four calendar quarters. Amount Detected values for TTHMs and HAAs are reported as the highest LRAAs. MCL (Maximum Contaminant Level): 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. MCLG (Maximum Contaminant Level Goal): 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. MRDL (Maximum Residual Disinfectant Level): 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. MRDLG (Maximum Residual Disinfectant Level Goal): 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. NA: Not applicable pci/l (picocuries per liter): A measure of radioactivity. ppb (parts per billion): One part substance per billion parts water (or micrograms per liter). ppm (parts per million): One part substance per million parts water (or milligrams per liter). SCL (Secondary Constituent Level): SCLs are established to regulate the aesthetics of drinking water like appearance, taste and odor.

6 SECONDARY S SAMPLED SCL MCLG LOW-HIGH VIOLATION TYPICAL SOURCE Chloride (ppm) NA No Runoff/leaching from natural deposits Copper (ppm) NA No Corrosion of household plumbing systems; Erosion of natural deposits Fluoride (ppm) NA No Erosion of natural deposits; Water additive that promotes strong teeth; Discharge from fertilizer and aluminum factories Iron (ppb) NA No Leaching from natural deposits; Industrial wastes Manganese (ppb) NA No Leaching from natural deposits Sulfate (ppm) NA No Runoff/leaching from natural deposits; Industrial wastes Total Dissolved Solids [TDS] (ppm) ,000 NA No Runoff/leaching from natural deposits Zinc (ppm) NA No Runoff/leaching from natural deposits; Industrial wastes UNREGULATED S 2 SAMPLED LOW-HIGH TYPICAL SOURCE Bromodichloromethane (ppb) Disinfection by-product Bromoform (ppb) Disinfection by-product Chloroform (ppb) Disinfection by-product Dibromochloromethane (ppb) Disinfection by-product Nickel (ppm) Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits Sodium (ppm) Erosion of natural deposits OTHER S SAMPLED LOW-HIGH TYPICAL SOURCE Bicarbonate (ppm) Erosion of natural deposits Calcium (ppm) Erosion of natural deposits Dichloroacetic Acid (ppb) Disinfection by-product Diluted Conductance (µs/cm) , ,110 Runoff/leaching from natural deposits Magnesium (ppm) Erosion of natural deposits Potassium (ppm) Erosion of natural deposits Total Alkalinity [as CaCO3] (ppm) Erosion of natural deposits Total Hardness (ppm) Erosion of natural deposits 2 Unregulated contaminants are those for which the U.S. EPA has not established drinking water standards. The purpose of unregulated contaminant monitoring is to assist the EPA in determining the occurrence of unregulated contaminants in drinking water and whether future regulation is warranted.