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HomeMy WebLinkAbout13 Attachment 2 Hirschdale 2021 CCR FinalTRUCKEE DONNER Public Utility District 2021 '1 Jar, -TER QUJALJTY REPORT Customer Views Are Welcome The Truckee Donner Public Utility District encourages community partici- pation in the public process. If you are interested in participating in the TDPUD's decision -making process, you are welcome to attend Board Meetings. The TDPUD Board of Directors meets at 6:00 PM on the first and third Wednesday of each month in the TDPUD Board room, located at 11570 Donner Pass Road, Truckee, California. Agendas for upcoming meetings may be obtained on our website or from the Deputy District Clerk's office, (530)582-3980. For More Information, 0 About this report or the water treatment process, contact Truckee Donner Public Utility District's Senior Water Quality Technician, Clay Walker at (530)582-3926. 0 About water conservation and efficiency, the TDPUD has water conservation programs that will help customers save water and save money. Information can be found on our website or by calling (530) 587-3896. %,00000000` 111, For more information about IL Ilk us, please visit our '\ website at `1L www.tdpud.org. IL A0000I/I///1 t 'Water Quality Truckee Donner Public Utility District is able to report that it has met all State and Federal drinking water standards. The data in this report is a snapshot of the qual- ity of water provided to TDPUD customers for the 2021 calendar year. This report includes details about your local water sources, annual water quality sampling data, and how it compares to State and USEPA standards. Truckee Donner Public Utility District is committed to providing you with the information about your water supply because customers who are well informed are key to the collaborative process in identifying improvements that are neces- sary to maintain the highest drinking water standards. It is important to note, that while the TDPUD strives to meet all Slate and Federal drinking water standards, some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, people who have under- gone organ transplants, people with HIVlAIDS or other immune system disorders, some elderly individuals, and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care pro- viders. USEPAICenters for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbiologi- cal contaminants are available from the Safe Drinking Water Hotline at (800)426- 4791 or https:llwww.epa.gov/ground-water-and-drinking-water/safe-drinking-water -hotline. Lead in Residential Plumbing If present, elevated levels of lead can cause serious health problems especially for pregnant women and young children. In circumstances where lead is detected in drinking water, it is primarily derived from materials and components associated with service lines and residential plumbing. The TDPUD is responsible for provid- ing high quality water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for a prolonged period of time, you can minimize the potential for lead exposure by flushing your lap for 30 seconds to 2 minutes before using water for drinking or cooking. We conduct routine sampling for lead every three years The last sampling was performed in 2019, where all sites tested below the Federal action level for lead More information about lead in drinking water, testing methods, and steps you can take to minimize exposure can be found at www.epa.gov head. Where Our Water Comes From The source of drinking water served to our Hirschdale customers comes from a well drawing from a deep aquifer We filter this water to remove iron, manganese, and arsenic before delivering it to your home. Additionally, each month the system is sampled for microbial quality. Because of natural filtration, the groundwater aquifer is protected from surface water contami- nation, giving us a high quality of drinking water. Cryptosporidium and Giardia Recognizing that our potable water sources are exclusively drawn from a deep groundwater well, the presence of microscopic organisms such as Cryptosporidi- um and Giardia in our water is highly unlikely. If ingested, Cryptosporidium and Giardia can cause diarrhea, fever, and other gastrointestinal symptoms. Source Water Assessment A source water assessment has been completed for the well serving the Hirschdale area. The well is located in the town of Hirschdale. The District owns and operates the single well which is 270ft in depth. A copy of the complete assessment may be viewed at the Truckee Donner Public Utility District office, located at 11570 Donner Pass Road Truckee, California, or by calling Chad Reed at (530)582-3984. 1 Arsenic In 2001 the United States Environmental Protection Agency (USEPA) adopted new standards for arsenic in drinking water. They lowered the maximum contaminant level from 50 parts per billion (ppb), down to 10 ppb. Since most people are not familiar with ppb, One part per billion would be equivalent to 1 second in 32 years so this an extremely small number. With this being con- sidered, the drinking water from Truckee Donner Public Utility District meets the current Federal and State standards for arsenic. The USEPA continues to re- I search the health effects of low levels of arsenic, which is a mineral known to cause cancer in humans with pro- oor longed exposures at elevated concentrations and has poten- tial links to other health effects such as skin damage and cir- culatory problems. Water Source Blending: The TDPUD operates the Glen - shire Drive Well, Prosser Village Well and Old Greenwood Well under a SWRCB approved blending permit. The blend- ing permit ensures lower detectable concentrations of arsenic in drinking water prior to being conveyed into the distribution system. The arsenic monitoring sample results from the blending point ranged from a low of 0.0 ppb to a high of 8.9 ppb with an average of 5.9 ppb. The MCL for arsenic is 10 ppb. Radon Radon is a radioactive gas that you cannot see, taste, or smell. It is found throughout the United States. Radon can move up through the ground and into a home through cracks and holes in structural foundations. Radon can ac- cumulate in all types of homes. Radon can also get into in- door air when released from tap water from showering, washing dishes, and other household activities. Compared to radon entering the home through ground sources, radon exposure through water sources are typically far less com- mon and much smaller in magnitude. Radon is a known hu- man carcinogen. Exposure to air containing radon has been known to lead to lung cancer. Drinking water containing ra- don may also cause increased risk of stomach cancer. If you are concerned about radon levels in your home, testing is recommended. Testing can be relatively inexpensive and easy. Radon mitigation and removal for your home is rec- ommended for detectable concentrations in excess of 4 pico- curies per liter of air (pCi1L). There are often simple ways to fix a radon problem that are not too costly. For additional information, call your State radon program (1-800-745- 7236), the USEPA Safe Drinking Water Hotline (1-800-426- 4791), or the National Safety Council Radon Hotline (1- 800-SOS-RADON). Substances That May Be Found In Water Definitions Sources of drinking water (both tap and bot- Maximum Contaminant Level (MCL): The highest tled water) include rivers, lakes, streams, level of a contaminant that is allowed in drinking water ponds, reservoirs, springs, and wells. As wa- Primary MCLs are set as close to the PHGs (or MCLGs) ter travels over the surface of the land or as is economically and technologically feasible. through the ground, it dissolves naturally- Secondary MCLs are set to protect the odor, taste, and occurring minerals and, in some cases, radio- _ appearance of drinking water. active material, and can pick up substances resulting from the presence of animals or; Maximum Contaminant Level Goal (MCLG): The level from human activity. of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by In order to ensure that tap water is safe to the U.S. Environmental Protection Agency (USEPA). drink, the U.S. Environmental Protection Agency (USEPA) and the State Water Public Health Goal (PHG): The level of a contaminant Resources Control Board (State Board) in drinking water below which there is no known or prescribe regulations that limit the amount of certain contaminants in water expected risk to health. PHGs are set by the California provided by public water systems. Drinking water, including bottled water, may Environmental Protection Agency. contain at least small amounts of some contaminants. The presence of many of these contaminants does not necessarily indicate that water poses a health Maximum Residual Disinfectant Level (MRDL): The risk. highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a Examples of contaminants that may be present in source water include: disinfectant is necessary for control of microbial contaminants. Microbial Contaminants, such as viruses and bacteria, that may come from stormwater or wastewater, septic systems, agricultural livestock opera- Maximum Residual Disinfectant Level Goal (MRDLG)- tions, and wildlife; The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do Inorganic Contaminants, such as salts and metals, that can be not reflect the benefits of the use of disinfectants to naturally occurring or can result from erosion, urban stormwater runoff, indus- control microbial contaminants. trial or domestic wastewater discharges, oil and gas production, mining, or farming; Primary Drinking Water Standards (PDWS): MCLs and MRDLs for contaminants that affect health along Pesticides and Herbicides, that may come from a variety of sources such with their monitoring and reporting requirements, and as agriculture, urban stormwater runoff, and residential uses; water treatment requirements. Organic Chemical Contaminants, including synthetic and volatile organic Secondary Drinking Water Standards (SDWS): MCLs chemicals, which are by-products of industrial processes and petroleum for contaminants that affect taste, odor, or appearance of production, and which can also come from gas stations, urban stormwater the drinking water. Contaminants with SDWSs do not runoff, agricultural applications, and septic systems; affect the health at the MCL levels. Radioactive Contaminants, that can be naturally occurring or can be the Regulatory Action Level (AL): The concentration of a result of oil and gas production and mining activities. contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow. More information about contaminants and potential health effects can be obtained by calling the U.S. EPA's Safe Drinking Water Hotline at (800) 426- 4791. Table Key NIA: not applicable NID: not detectable at testing limit ppm: parts per million or milligrams per liter (mg1L) ppb. parts per billion or micrograms per liter (pg/L) ppt: parts per trillion or nanograms per liter (ng/L) pCiIL: picocuries per liter (a measure of radiation) (NSIcm): micro Siemens per centimeter (NTU): nephelometric turbidity unit (measures water cloudiness) Microbiological Contami- Highest No.ofDetec- No. violation months in MCL MCLG Typical Source of Bacteria Hants tions violation Coliform Bacteria Vlore than 5% of sample: in a month with a detec- tion ly present in the environment Contaminant N Samples, Frequency Average Level Range MCL (MRDL) MCLG (MRDLG) Typical Source of Contaminant Chlorine Residual (ppm) I per month 0.57 .39-.75 d Drinking water disinfectant added for treatment Total Trihalomethanes b I on 8/9121 5 N/A 80 NIA By-product of drinking water T disinfection _ Ilaloacectic Acids (ppb) I on 8191/2 i 9.9 NIA 60 NsA BY -product of drinking water disinfection No. of 90th per - No. sites Lead and Copper Date Last Sampled samples centile level de- exceeding At. PHG Typical Source of Contaminant collected tected AL _ Internal corrosion of household water Lead (ppb) 08107'19 5 1 0 15 0 2 plumbing systems; discharges from industrial manufacturers; erosion of natural de osits Internal corrosion of household Copper (ppm) 08.'0719 5 0.061 0 1.3 0.3 plumbing systems; erosion of natu- ral deposits; leaching from wood preservatives Chemical or Constituent (reporting units) Date Last Sampled Level De- tected Range of Detections MCL PHC (MCLG) Typical Source of Contaminant salt present in the water and is general y naturally occurring Sodium (ppm) 2019 50 N-A NIA NIA Sum of polyvalent cations present Hardness (as CaCO3) (ppm) 2019 62 N'A N-A N A in the water, generally magnesium and calcium, and are usually natu- rally occurring Chemical or Constituent (reporting units) Date Last Sampled Level Detected Range of Detec- tions MCL PHC (MCLG) Typical Source of Contaminant Erosion of natural deposits Alkalinity (as CaCO3) (ppm) 2019 150 N-A NIA NIA Bicarbonate Alkalinity (as HCO3) (ppm) 2019 180 NIA NIA NIA Leaching of natural deposits Calcium (ppm) 2019 11 N/A NIA N.'A Erosion of natural deposits Magnesium (ppm) 2019 8 NIA NIA NIA Erosion of natural deposits Potassium (ppm) 2019 4.8 NIA NIA NIA Erosion of natural deposits Chemical or Constituent Date Last Level Detected Range of Detec- MCL PHG Typical Source of Contaminant (reporting units) Sampled tions (MCLG) senic (ppb) 2019 3.0 56 0.16 3.20 NOD-7.0 10 0.004 Erosion of natural deposits srium (ppm) 2019 N A N A N'A 1000 2000 Erosion of natural deposits uoride (ppm) 2019 2 5 1 Erosion of natural deposits Soil runoff irbidity (NTU) 2019 5 Gross Alpha Particle 2018 N D 3 15 0 Erosion of natural deposits Activity (pCi/L) Radon (pCi1L) 2005 570 N-A N!A• WA* Erosion of natural deposits 'Note he State of California does not have an MCL for Radon. The EPA has an advisory MCL of 4000 pCi/L or Radon. Chemical or Constituent (reporting units) Date Last Sampled Level Detected Range of Detec- tions MCL PHG (MCLG) Typical Source of Contaminant Chloride (ppm) 2019 7 76 8.30 7.8 340 N`A 250 NiA Leaching of natural deposits Iron (ppb) 2019 N'A N`A 7.7 • 8.3 300 NIA Leaching of natural deposits Manganese (ppb) 2019 50 NIA Leaching of natural deposits PH 2019 6.5 - 8.5 NIA Erosion of natural deposits Specific µ Conductance (Slcm) 2019 N A 1600 WA Substances that form ions when in Sulfate 2019 13 N-A 250 N,A Leaching of natural deposits Total Dissolved Solids (ppm) 2019 220 N A 500 N-A Leaching of natural deposits FREQUENTLY ASKED QUESTIONS Q. Why does my water smell and taste like chlorine? A. Chlorine is regularly injected into the water at the source as a disinfectant that aids in elimi- nating potentially harmful bacteria present in water. In high demand summer month's chlorine taste may be more noticeable because the water is "fresh" or "newer" and has not had time to dissi- pate through the system. Chlorine can also gas off in warm/hot water which produces a smell strong- er than normal. Some people are more sensitive than others to the taste and smell of chlorine and may become aware of occasional changes. This is normal and safe. Chlorine levels are continually monitored. Q. Why does my water taste like metal? A. The source water is ground water, which has a mineral content that might give off a metal taste some are not used too. Sometimes plumbing can cause a metal taste, especially if water has been sitting in pipes for several hours. It's best to flush the lines for of couple minutes if water has sat in pipes for an extending period of time, however, this does not indicate a higher or lower degree of water quality. Q. Why is there white crust on my shower head? A. The minerals in water may leave white spots on glasses, coffeepots, shower heads and show- er doors. These spots are calcium deposits and are not harmful to health. Q. Why is there a black ring around my toilet? A. This black ring some may find after returning home when water has sat in the bowl for ex- tending period of time is mold. Mold will grow in dark, wet, cool places making the toilet bowl a per- fect place for that. If this accrues adding bleach to the bowl and letting it sit works best. To avoid this, leave a small amount of bleach in the bowl before leaving for more than a couple days. Q. What clauses cloudy water? A. Cloudy or milky water is usually caused by trapped air picked up from an air pocket in the wa- ter main or internal plumbing. Sometimes flows or water cascading within the aqueduct can also trap air, similar to a waterfall. If water sits in a glass or pitcher for a few minutes the air will dissipate and become clear.