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I/ V A No , t 1_' a How to Read the Water Quality Data Tables he tables show the contaminants we found last }ear or the most recent time ne sampled for hat contaminant. They also show the levels of those contamr-,nts and the Environmental Protection Agency's limits. Substances that we tested for but di ; not find are not included in the tables. We sample for some contarninants less than once a year because their levels in water are not expected to change from year to year. If we founr v , contarninants the last time we sampled for them, we included them in the tables below , the detection date. We may have done additional monitoring for contarninants that are not included in the Safe Drinking Water Act. To request a copv of these results, call the Minnesota Department of Health at 651-201-4700 or 1-800-818-4318 between 8:00 a.m. and 4:30 p.m , %'.,nday through Friday. ' f"w4w To request a copy of additional monitoring results that are it; � icluded in the Safe Drinking Water Act, call the Minnesota Department of Health at 651-201 `0 or 1-800-818-9318. y� Explaining Special Situations for the Highest Result and Average Some contarninants are monitored regularly throughout the year, and rolling (or moving) annual averages are used to manage compliance. Because of this averaging, there are times where the Range of Detected Test Results for the calendar year is lower than the Highest Ave, age or Highest Single Test Result, because it occurred in the previous calendar year. Definitions Action Level). The concerto of a contaminant ,which, if exceeded, t s treatment or other requirements wt. waters, must follow. EPA: Environn Protection Ager 1` to health. MCLGs allow for a margin of N/A (Not applicable): Does not apply. pCi/I (picocuries per liter): A measure of MRDL (Maximum residual disinfectant level): radioactivity. 111111� The highest level of a disinfectant allowed in drinking water There is convincing evidence ppb (parts per billion): One part per billion in that addition of a disinfectant is necessary for water is like one drop in one billion drops of MCL (Maximum contaminant level): The control of microbial contaminants. water, or about one drop in a swimming pool. ke highest level of a contan. !-,at is allowed ppb is the same as micrograms per liter (µg/1). in drinking water. MCLs are ,et as close to the MRDLG (Maximum residual disinfectant level MCLGs as feasible using the best available goal). The level of a drinking water ppm (parts per million): One part per million treatment technology. disinfectant below which there is no known or is like one drop in one million drops of water, expected risk to health MRDLGs do not or about one cup in a swimming pool. ppm is MCLG (Maximum contaminant level goal) reflect the benefits of the use of disinfectants the same as milligrams per Inter (mg/1). The level of a contaminant in drinking water to control microbial contaminants. below which there is no known or expected PWSID: Public water system identification r-1 Ngw 2