SWS CCR Form Revised February 2019 2018 Consumer Confidence Report Water System Name: Block 77 Co-op Report Date: June 9, 2019 We test the drinking water quality for many constituents as required by state and federal regulations. This report shows the results of our monitoring for the period of January 1 to December 31, 2018 and may include earlier monitoring data. Este informe contiene información muy importante sobre su agua para beber. Favor de comunicarse Block 77 Co-op a 5010 Bluff Street, Norco para asistirlo en español. .............................. Block 77 Co-op ........5010 Bluff Street, Norco, (951) 340-9000. Ang pag-uulat na ito ay naglalaman ng mahalagang impormasyon tungkol sa inyong inuming tubig. Mangyaring makipag-ugnayan sa Bock 77 Co-op, 5010 Bluff Street, Norco o tumawag sa (951) 340-9000 para matulungan sa wikang Tagalog. Báo cáo này ch.a thông tin quan tr.ng v. nu.c u.ng c.a b.n. Xin vui lòng liên h. Bock 77 Co-op t.i 5010 Bluff Street, Norco, (951) 340-9000 d. du.c h. tr. giúp b.ng ti.ng Vi.t. Tsab ntawv no muaj cov ntsiab lus tseem ceeb txog koj cov dej haus. Thov hu rau Block 77 Co-op ntawm 5010 Bluff Street rau kev pab hauv lus Askiv. Type of water source(s) in use: Groundwater Name & general location of source(s): Main well near the Santa Ana River in an undisclosed location Drinking Water Source Assessment information: A water source assessment was conducted for the Block 77 Water Company in 2001. The source was considered vulnerable to the following activities not associated with any detected Contaminants: Septic systems and low density agricultural irrigation wells. Time and place of regularly scheduled board meetings for public participation: Annually as scheduled by members For more information, contact: Mary CJ Roberts Phone: (951) 340-4000 TERMS USED IN THIS REPORT Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and technologically feasible. Secondary MCLs are set to protect the odor, taste, and appearance of drinking water. Maximum Contaminant Level Goal (MCLG): The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the U.S. Environmental Protection Agency (U.S. EPA). Public Health Goal (PHG): The level of a contaminant in drinking water below which there is no known or expected risk to health. PHGs are set by the California Environmental Protection Agency. Maximum Residual Disinfectant Level (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 (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. Primary Drinking Water Standards (PDWS): MCLs and MRDLs for contaminants that affect health along with their monitoring and reporting requirements, and water treatment requirements. Secondary Drinking Water Standards (SDWS): MCLs for contaminants that affect taste, odor, or appearance of the drinking water. Contaminants with SDWSs do not affect the health at the MCL levels. Treatment Technique (TT): A required process intended to reduce the level of a contaminant in drinking water. Regulatory Action Level (AL): The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow. Variances and Exemptions: Permissions from the State Water Resources Control Board (State Board) to exceed an MCL or not comply with a treatment technique under certain conditions. Level 1 Assessment: A Level 1 assessment is a study of the water system to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system. Level 2 Assessment: A Level 2 assessment is a very detailed study of the water system to identify potential problems and determine (if possible) why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on multiple occasions. ND: not detectable at testing limit ppm: parts per million or milligrams per liter (mg/L) ppb: parts per billion or micrograms per liter (µg/L) ppt: parts per trillion or nanograms per liter (ng/L) ppq: parts per quadrillion or picogram per liter (pg/L) pCi/L: picocuries per liter (a measure of radiation) Consumer Confidence Report Page 2 of 4 SWS CCR Form Revised February 2019 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. Contaminants that may be present in source water include: . Microbial contaminants, such as viruses and bacteria, that may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife. . Inorganic contaminants, such as salts and metals, that can be naturally-occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming. . Pesticides and herbicides, that may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses. . Organic chemical contaminants, including synthetic and volatile organic chemicals, that are byproducts of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, agricultural application, and septic systems. . Radioactive contaminants, that 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 U.S. EPA and the State Board prescribe regulations that limit the amount of certain contaminants in water provided by public water systems. The U.S. Food and Drug Administration regulations and California law also establish limits for contaminants in bottled water that provide the same protection for public health. Tables 1, 2, 3, 4, 5, and 6 list all of the drinking water contaminants that were detected during the most recent sampling for the constituent. The presence of these contaminants in the water does not necessarily indicate that the water poses a health risk. The State Board allows us to monitor for certain contaminants less than once per year because the concentrations of these contaminants do not change frequently. Some of the data, though representative of the water quality, are more than one year old. Any violation of an AL, MCL, MRDL, or TT is asterisked. Additional information regarding the violation is provided later in this report. TABLE 1 – SAMPLING RESULTS SHOWING THE DETECTION OF COLIFORM BACTERIA Microbiological Contaminants Tested monthly in 2018 Highest No. of Detections No. of Months in Violation MCL MCLG Typical Source of Bacteria Total Coliform Bacteria (state Total Coliform Rule) 2 1 1 positive monthly sample 0 Naturally present in the environment Fecal Coliform or E. coli (state Total Coliform Rule) 0 0 A routine sample and a repeat sample are total coliform positive, and one of these is also fecal coliform or E. coli positive Human and animal fecal waste E. coli (federal Revised Total Coliform Rule) 0 0 (a) 0 Human and animal fecal waste (a) Routine and repeat samples are total coliform-positive and either is E. coli-positive or system fails to take repeat samples following E. coli-positive routine sample or system fails to analyze total coliform-positive repeat sample for E. coli. TABLE 2 – SAMPLING RESULTS SHOWING THE DETECTION OF LEAD AND COPPER Lead and Copper (complete if lead or copper detected in the last sample set) Sample Date No. of Samples Collected 90th Percentile Level Detected No. Sites Exceeding AL AL PHG No. of Schools Requesting Lead Sampling Typical Source of Contaminant Lead (ppb) 7/16/16 5 ND 0 15 0.2 N/A Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits Copper (ppm) 7/16/16 5 1.03 0 1.3 0.3 Not applicable Internal corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives Consumer Confidence Report Page 3 of 4 SWS CCR Form Revised February 2019 TABLE 3 – SAMPLING RESULTS FOR SODIUM AND HARDNESS Chemical or Constituent (and reporting units) Sample Date Level Detected Range of Detections MCL PHG (MCLG) Typical Source of Contaminant Sodium (ppm) 8/26/16 96 96 None None Salt present in the water and is generally naturally occurring Hardness (ppm) 8/26/16 310 310 None None Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually naturally occurring TABLE 4 – DETECTION OF CONTAMINANTS WITH A PRIMARY DRINKING WATER STANDARD Chemical or Constituent (and reporting units) Sample Date Level Detected Range of Detections MCL [MRDL] PHG (MCLG) [MRDLG] Typical Source of Contaminant Arsenic (ppb) 8/26/16 8.6 8.6 10 0.004 Erosion of natural deposits; runoff from orchards; glass and electronics production wastes Radium 226 (pCi/L) 4/26/2013 0.00 N/A 2 Erosion of natural deposits Gross alpha (pCi/L) (testing required in 2016, test to be conducted in 2017) 6/30/17 5.06 N/A 15 0 Erosion of natural deposits Uranium (pCi/L) 4/26/2013 ND N/A 20 0.43 Erosion of natural deposits Flouride (ppm) 8/26/16 0.51 0.51 2 1 Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories Nitrate as N (NO3-N) (ppm) 11/30/18 2.2 2.2 10 10 Runoff and leaching from fertilizer use; leaching from septic tanks and sewage; erosion of natural deposits TABLE 5 – DETECTION OF CONTAMINANTS WITH A SECONDARY DRINKING WATER STANDARD Chemical or Constituent (and reporting units) Sample Date Level Detected Range of Detections SMCL PHG (MCLG) Typical Source of Contaminant Manganese (ppb) 8/26/16 140 140 50 N/A Leaching from natural deposits Sulfate (ppm) 8/26/16 91 91 500 N/A Runoff/leaching from natural deposits; industrial wastes Total dissolved solids (ppm) 8/26/16 600 600 1000 N/A Runoff/leaching from natural deposits Specific conductance (uS/cm) 8/26/16 1000 1000 1600 N/A Substances that form ions when in water; seawater influence Odor (threshold) 8/26/16 1 1 3 N/A Naturally occurring organic materials Chloride (ppm) 8/26/16 120 120 500 N/A Runoff/leaching from natural deposits; seawater influence TABLE 6 – DETECTION OF UNREGULATED CONTAMINANTS Chemical or Constituent (and reporting units) Sample Date Level Detected Range of Detections Notification Level Health Effects Language Vanadium (ppb) 8/26/16 19 19 50 The babies of some pregnant women who drink water containing vanadium in excess of the notification level may have an increased risk of developmental effects, based on studies in laboratory animals. Consumer Confidence Report Page 4 of 4 SWS CCR Form Revised February 2019 Boron (ppb) 8/26/16 0.3 0.3 1 The babies of some pregnant women who drink water containing boron in excess of the notification level may have an increased risk of developmental effects, based on studies in laboratory animals. Additional General Information on Drinking Water 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 the water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the U.S. EPA’s Safe Drinking Water Hotline (1-800-426-4791). Some people may be more vulnerable to contaminants in drinking water than the general population. Immunocompromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. U.S. EPA/Centers for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (1-800-426-4791). Lead-Specific Language: 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. Block 77 Co-op 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 do so, you may wish to collect the flushed water and reuse it for another beneficial purpose, such as watering plants. 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 (1-800-426-4791) or at http://www.epa.gov/lead. Summary Information for Violation of a MCL, MRDL, AL, TT, or Monitoring and Reporting Requirement VIOLATION OF A MCL, MRDL, AL, TT, OR MONITORING AND REPORTING REQUIREMENT Violation Explanation Duration Actions Taken to Correct the Violation Health Effects Language Violation of the total coliform rule-TCR citation issued November 2017 Unable to determine source of contamination The violation occurred from October 2017 through January 2018 and was corrected by February 2018 System wide chlorination conducted Coliforms are bacteria that are naturally present in the environment and are used as an indicator that other, potentiallyharmful, bacteria may be present. Coliforms were found in more samples than allowed and this was a warning of potential problems.