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Test Results <br />Our water is monitored for many different kinds of substances on a very strict sampling schedule. And, the water we <br />deliver must meet specific health standards. Here, we only show those substances that were detected in our water (a <br />complete list of all our analytical results is available upon request). Remember that detecting a substance does not mean the <br />water is unsafe to drink; our goal is to keep all detects below their respective maximum allowed levels. <br />The State recommends monitoring for certain substances less than once per year because the concentrations of these <br />substances do not change frequently. In these cases, the most recent sample data are included, along with the year in which <br />the sample was taken. <br />REGULATED SUBSTANCES <br />SUBSTANCE <br />(UNIT OF MEASURE) <br />YEAR <br />SAMPLED <br />MCL <br />[MRDL] <br />MCLG <br />[MRDLG] <br />AMOUNT <br />DETECTED <br />RANGE <br />LOW-HIGH VIOLATION TYPICAL SOURCE <br />2,4-D (ppb)2017 70 70 0.25 NA No Runoff from herbicide used on row crops <br />Barium (ppm)2018 2 2 0.02 NA No Discharge of drilling wastes; Discharge from metal <br />refineries; Erosion of natural deposits <br />Chlorine (ppm)2020 [4][4]0.74 0.66–0.89 No Water additive used to control microbes <br />Fluoride (ppm)2020 4 4 0.68 0.59–0.72 No Erosion of natural deposits; Water additive, which <br />promotes strong teeth; Discharge from fertilizer and <br />aluminum factories <br />Gross Alpha (pCi/L)2020 15.4 0 3.6 0–3.6 No Erosion of natural deposits <br />Haloacetic Acids [HAAs] <br />(ppb) <br />2020 60 NA 3.8 3.70–3.8 No By-product of drinking water disinfection <br />Nitrate (ppm)2020 10.4 10 1.7 0.00–1.70 No Runoff from fertilizer use; Leaching from septic tanks, <br />sewage; Erosion of natural deposits <br />TTHMs [Total <br />Trihalomethanes] (ppb) <br />2020 80 NA 12.3 7.7–12.3 No By-product of drinking water disinfection <br />Tap Water Samples Collected for Copper and Lead Analyses from Sample Sites throughout the Community <br />SUBSTANCE <br />(UNIT OF MEASURE) <br />YEAR <br />SAMPLED AL MCLG <br />AMOUNT <br />DETECTED <br />(90TH %ILE) <br />SITES ABOVE <br />AL/TOTAL <br />SITES VIOLATION TYPICAL SOURCE <br />Copper (ppm)2019 1.3 1.3 0.28 1/30 No Corrosion of household plumbing systems; Erosion of natural <br />deposits <br />Lead (ppb)2019 15 0 1.8 0/30 No Lead services lines; Corrosion of household plumbing systems, <br />including fittings and fixtures; Erosion of natural deposits <br />UNREGULATED SUBSTANCES <br />SUBSTANCE <br />(UNIT OF MEASURE) <br />YEAR <br />SAMPLED <br />AMOUNT <br />DETECTED <br />RANGE <br />LOW-HIGH <br />Manganese (ppb)2019 0.41 0–0.81 <br />Sodium1 (ppm)2020 4.43 2.76–4.43 <br />Sulfate (ppm)2020 16.3 2.45–16.3 <br />1 In-home water softening can <br />increase the level of sodium in <br />your water. <br />Definitions <br />90th %ile: The levels reported for lead <br />and copper represent the 90th percentile of <br />the total number of sites tested. The 90th <br />percentile is equal to or greater than 90% <br />of our lead and copper detections. <br />AL (Action Level): The concentration of <br />a contaminant which, if exceeded, triggers <br />treatment or other requirements which a <br />water system must follow. <br />MCL (Maximum Contaminant Level): <br />The highest level of a contaminant that is <br />allowed in drinking water. MCLs are set as <br />close to the MCLGs as feasible using the <br />best available treatment technology. <br />MCLG (Maximum Contaminant Level <br />Goal): The level of a contaminant in <br />drinking water below which there is no <br />known or expected risk to health. MCLGs <br />allow for a margin of safety. <br />MRDL (Maximum Residual Disinfectant <br />Level): The highest level of a disinfectant <br />allowed in drinking water. There is <br />convincing evidence that addition of a <br />disinfectant is necessary for control of <br />microbial contaminants. <br />MRDLG (Maximum Residual <br />Disinfectant Level Goal): The level <br />of a drinking water disinfectant below <br />which there is no known or expected <br />risk to health. MRDLGs do not reflect <br />the benefits of the use of disinfectants to <br />control microbial contaminants. <br />NA: Not applicable. <br />ND (Not detected): Indicates that the <br />substance was not found by laboratory <br />analysis. <br />pCi/L (picocuries per liter): A measure of <br />radioactivity. <br />ppb (parts per billion): One part <br />substance per billion parts water (or <br />micrograms per liter). <br />ppm (parts per million): One part <br />substance per million parts water (or <br />milligrams per liter). <br />60