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Home My WebLink About20 Attachment 1 Main 2022 CCR Final TRUCKEE DONNER Public Utility District r/1rr A AV ■ r■ / /!C/1Vr■ ■ ■ ■ /r■ r\■ ff ■ Truckee Main System PWS# 111 Customer Views Are Welcome co CIC*O"40[t� For more information about The Truckee Donner Public Utility District encourages community partici- us, please visit our website pation in the public process. If you are interested in participating in the at www.tdpud.org . TDPUD's decision-making process, you are welcome to attend Board Meetings. - The Board of Directors meets at 6:00 PM on the first and third Wednes- day of each month in the TDPUD Board room, located at 11570 Donner In This Document Pass Road, Truckee, California. Agendas for upcoming meetings may be obtained on our website or from the Deputy District Clerk's office, (530) 0 Water 582-3980. Information For More Information: - Water Assessment - •Comes 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. Lead • - Plumbing 0 About water conservation and efficiency, the TDPUD has water con- 0 Radon servation programs that will help customers save water and save money. Information can be found on our website or by calling (530) Definitions 587-3896. III j I ITT I 11 li 16 M I'll', ill 111 it li1i 11111t 411i ii 111m 11141 7"pit fififfffijffFl �� 11 �� lll�i! Itfll� Eil1J3 tl�lol Illfll IIIIII �f:ltl III!li !li!I! 11t1d��11911111i3f�ll[tllf�l�,,(��—� — Este informe contiene informaci6n muy importante sobre su agua potable. Traduzcalo o hable con alguien que to entienda bien. Am Water Quality Truckee Donner Public Utility District takes pride in delivering the highest quality of water to its customers. The water quality staffs goal is to exceed State and USEPA water quality standards. Staff takes 520 routine bac-t samples annually AO"I along with Title 22 monitoring samples.All samples are examined by a certified ELAP laboratory using a methodology required by State and Federal laws.The data in this brochure is a snapshot of the quality of water provided to TDPUD customers for the 2022 calendar year.This report includes details about your local water resources,water quality monitoring data, and how it compares to State and USEPA standards. Truckee Donner Public Utility District is committed to providing you with 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 State and Federal Source Water drinking water standards,some people may be more vulnerable to contaminants Assessment in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, people who have undergone A source water assessment was prepared in organ transplants, people with HIV/AIDS or other immune system disorders, some 2002 for the wells serving the Truckee area. elderly individuals, and infants can be particularly at risk from infections. These The wells are located throughout the town of people should seek advice about drinking water from their health care providers. Truckee and Glenshire.The District owns USEPA/Centers for Disease Control (CDC)guidelines on appropriate means to and operates 10 wells varying in depth from lessen the risk of infection by Cryptosporidium and other microbiological contam- 120ft to 500ft. The complete source water inants are available from the Safe Drinking Water Hotline at(800)426-4791 or assessment and known vulnerabilities may https://www.epa.gov/ground-water-and-drinking-water/safe-drinking-water-hotline. be viewed at the Truckee Donner Public Utility District office, located at 11570 Donner Pass Road, Truckee, California, or by calling Lead in Residential Plumbing Chad Reed at(530)582-3984. 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.TDPUD is responsible for providing high quality water, but cannot control the variety of materials used in plumbing components within private property. If your water has been sitting for a prolonged period of time, you can minimize the potential for lead exposure by flushing your What i s Ground Water? tap 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 per- formed in 2022,where all sites tested below the Federal action level for lead.The next round of lead sampling is scheduled for the summer of 2025. More infor- mation about lead in drinking water,testing methods, and steps you can take to minimize exposure can be found at www.epa.gov/lead. Where Our Water Comes From Drinking water served to Truckee Donner Public Utility District customers in the Truckee system is groundwater that comes from 10 deep wells. Because of natu- ral filtration,the groundwater aquifer is protected from surface water contamina- tion, giving us a high quality of drinking water. Sand and gravel Cryptosporidium and Giardia Recognizing that our potable water sources are exclusively deep groundwater wells,the presence of microscopic organisms such as Cryptosporidium and Giar- clay dia in our water is highly unlikely. If ingested, Cryptosporidium and Giardia can cause diarrhea,fever, and other gastrointestinal symptoms. 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 _. . 1 7: , I. 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- search the health effects of low levels of arsenic, which is a mineral known to cause cancer in humans with pro- 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 Water Hardness Well under a SWRCB approved blending permit. The blend- Occasionally, a water user will need to adjust an ing permit ensures lower detectable concentrations of arsenic in drinking water prior to being conveyed into the distribution appliance, such as a dishwasher or water sof- system. The arsenic monitoring sample results from the tener, to a particular setting based upon the blending point ranged from a low of 0.0 ppb to a high of hardness of the water served to their home or 10.0 ppb with an average of 4.7 ppb. The MCL for arsenic is business. 10 ppb. Radon Please use the information provided below to help with water hardness questions. 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, Water Softener Appliance Setting washing dishes, and other household activities. Compared to radon entering the home through ground sources, radon In 2022 testing, D' -• an average - •exposure through water sources are typically far less com- averagenes ' • • ' mon and much smaller in magnitude. Radon is a known hu- of grains per gallon. _ grain per man carcinogen. Exposure to air containing radon has been gallon equals 17.1 mg/L. 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 Degree of Hardness Grains per •• • 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 (pCi/L). 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- Hard 7236), the USEPA Safe Drinking Water Hotline (1-800-426- Moderately 4791), or the National Safety Council Radon Hotline (1- 800-SOS-RADON). :0 180 Substances That Could Be In Water Definitions The sources of drinking water (both tap and Maximum Contaminant Level (MCL): The highest bottled water) include rivers, lakes, streams, level of a contaminant that is allowed in drinking wa- ponds, reservoirs, springs, and wells. As wa- ter. Primary MCLs are set as close to the PHGs (or ter travels over the surface of the land or - MCLGs) as is economically and technologically fea- through the ground, it dissolves naturally- + sible. Secondary MCLs are set to protect the odor, occurring minerals and, in some cases, radio- taste, and appearance of drinking water. active material, and can pick up substances ` resulting from the presence of animals or Maximum Contaminant Level Goal (MCLG): The from human activity. level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs In order to ensure that tap water is safe to 4 , are set by the U.S. Environmental Protection Agency drink, the U.S. Environmental Protection ;••r�" �• (USEPA). Agency (USEPA) and the State Water Resources Control Board (State Board) Public Health Goal (PHG): The level of a contami- prescribe regulations that limit the amount of certain contaminants in water nant in drinking water below which there is no known provided by public water systems. State Board regulations also establish limits or expected risk to health. PHGs are set by the Cali- for contaminants in bottled water that provide the same protection for public fornia Environmental Protection Agency. health. Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of Maximum Residual Disinfectant Level (MRDL): contaminants does not necessarily indicate that water poses a health risk. The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of Contaminants that may be present in source water include: a disinfectant is necessary for control of microbial contaminants. Microbial Contaminants, such as viruses and bacteria, that may come from sewage treatment plants, septic systems, agricultural livestock operations, and Maximum Residual Disinfectant Level Goal wildlife; (MRDLG): The level of a drinking water disinfectant below which there is no known or expected risk to Inorganic Contaminants, such as salts and metals, that can be natu- health. MRDLGs do not reflect the benefits of the rally occurring or can result from urban stormwater runoff, industrial or domes- use of disinfectants to control microbial contami- tic wastewater discharges, oil and gas production, mining, or farming; nants. Pesticides and Herbicides, that may come from a variety of sources such as Primary Drinking Water Standards (PDWS): agriculture, urban stormwater runoff, and residential uses; MCLs and MRDLs for contaminants that affect health along with their monitoring and reporting require- Organic Chemical Contaminants, including synthetic and volatile organic ments, and water treatment requirements. chemicals, which are by-products of industrial processes and petroleum production, and which can also come from gas stations, urban stormwater Secondary Drinking Water Standards (SDWS): runoff, agricultural applications, and septic systems; MCLs for contaminants that affect taste, odor, or appearance of the drinking water. Contaminants with Radioactive Contaminants, that can be naturally occurring or can be the re- SDWSs do not affect the health at the MCL levels. sult of oil and gas production and mining activities. Regulatory Action Level (AL): The concentration of a contaminant which, if exceeded, triggers treat- ment or other requirements that a water system must follow. Table not applicable N/D: no detectable at testing limit ppm: parts per million or milligrams per liter (mg/L) ppb: parts per billion or micrograms per liter(pg/1) ppt: parts per trillion or nanograms per liter(ng/L) pCi/L: picocuries per liter(a measure of radiation) (pS/cm): micro Siemens per The data in the following tables is from the most recent monitoring done in compliance with Federal and California drink- ing water regulations. Some data may be more than one year old. Based upon Federal and State requirements, the moni- toring interval for each constituent varies, and can be any one of the following: weekly, monthly, semi-annually, annual- ly, biennially, or once every three, six, or nine years, or as deemed necessary by regulatory agencies. SAMPLING1 DETECTION OF COLIFORMBACTERIA No. Microbiological Contam- HighestNo. of months in viola- inants of Detec- tion MCL MCLG Typical Source of Bacteria tions More than 5%of Naturally present in the envi- Total Coliform Bacteria 0 0 samples in a month 0 ronment with a detection TABLEDISINFECTION " 11 #Samples, Average MCLG Typical Source of Contami- Contaminant Frequency Level Range MCL(MDRL) (MDRLG) nant 40-50 per Drinking water disinfectant Chlorine Residual(ppm) month 0.38 .36-.41 4 4 added for treatment By-product of drinking water Haloacetic Acids(ppb) 2 on 9/14/22 1.70 0-3.5 60 N/A disinfection Total Trihalomethanes By-product of drinking water (ppb) 2 on 9/14/22 10.5 10.1-11 80 N/A disinfection TABLE 3 -DISTRIBUTION CUSTOMER TAP SAMPLING FOR LEAD AND COPPER No. of sam- 90th No. sites Date Last percentile Typical Source of Contami- Lead and Copper Sampled Ples collect- level de- exceeding AL PHG nant ed tected AL Internal corrosion of household Lead(ppb) August 32 7.0 0 15 0.2 plumbing systems; discharges 2022 from industrial manufac- tures,erosion of natural deposits Internal corrosion of household Copper(ppm) August 32 0.180 0 1.3 0.3 plumbing systems; erosion of 2022 natural deposits; leaching from wood preservatives TABLE 4- LEAD SAMPLING FOR SCHOOL DISTRICT No. of Schools Re- No. sites Contaminant Dated questing Range exceeding AL PHG Typical Source of Contami- pleLead Sam- AL nant pling Internal corrosion of household Lead(ppb) Dec-18 8 <0.2 0 15.0 0.2 plumbing systems; erosion of natural deposits; leaching from wood preservatives TABLE1 COMPOUNDS Chemical or Constituent Date Last Average Level Range of Detec- PHG Typical Source of Contami- (reporting units) Sampled Detected tions MCL (MCLG) nant Alkalinity(as CaCO3) 2022 77 69-88 N/A N/A Naturally present in water (ppm) Bicarbonate Alkalinity(as 2022 77 69-88 N/A N/A Naturally present in water HCO3) (ppm) Calcium(ppm) 2022 15 11-33 N/A N/A Natually occuring Potassium(ppm) 2022 3.3 2.1-8.3 N/A N/A Leaching of natural deposits • i 1 DETECTION OF CONTAMINANTS PRIMARY DRINKING WATER STAN1 ' 1 Chemical or Constituent Date Last Average Level Range of Detec- MCL PHG Typical Source of Contami- (reporting units) Sampled Detected tions (MCLG) nant Arsenic (ppb) 2022 4.70 N/D - 10 10 0.004 Erosion of natural deposits Barium(ppb) 2022 17.70 7.1-29 1000 2000 Erosion of natural deposits Chromium, Total(ppb) 2022 0.50 N/D- 1.4 100 100 Erosion of natural deposits Chromium,Hexavalent 2020/2021 0.90 0.33 - 1.20 0 0 Erosion of natural deposits (ppb) *Note The State of California does not have an MCL for Hexavalent Chromium (ppb).The previous MCL of 0.0010 mg/I was withdrawn On September 11, 2017 Fluoride(ppm) 2022 0.01 N/D - 0.63 2 1 Erosion of natural deposits Runoff and leaching from ferti- Nitrate as N(ppm) 2022 0.30 N/D -0.58 10 10 lizer use; leaching from septic tanks and sewage; erosion of natural deposits Turbidity(NTU) 2022 0.20 N/D - 0.45 5 5 Soil runoff Gross Alpha Particle 2007-2018 0.7 N/D-4.6 15 0 Erosion of natural deposits Activity(pCi/L) Radon(pCi/L) 2004 90.8 N/D-560 N/A* N/A* Erosion of natural deposits The State of California does not have an MCL for Radon.The EPA has an advisory MCL of 4000 *Note pCi/L for Radon. SECONDARYTABLE 7 -DETECTION OF CONTAMINANTS DR STAND- ARD Chemical or Constituent Date Last Level Detected Range of Detec- MCL PHG Typical Source of Contami- (reporting units) Sampled tions (MCLG) nant Chloride(ppm) 2022 11.0 Jan-62 250 N/A Leaching of natural deposits Odor-Threshold(TON) 2022 0.4 N/D- 1 3 N/A Naturally-occurring organic materials pH 2O22 8.1 8-8.2 6.5 - 8.5 6.5 - 8.5 Leaching of natural deposits Specific Conductance 2019 182 110- 380 1600 N/A Substances that form ions when (µS/cm) in water. Total Dissolved Solids 2019 122 110-230 500 N/A Leaching of natural deposits (ppm) 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 stronger 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 water 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 be-