assess the potential health impacts associated with mixtures of contaminants. Hazard Index guidance for a class of contaminants or mixture of contaminants, may be determined by the U.S. EPA or Wisconsin Department of Health Services. If a Health Index is exceeded, a system may be required to post a public notice. 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 or why total coliform bacteria have been found in our water system, or both, on multiple occasions. MCL – Maximum Contaminant Level: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible, using the best available treatment technology. MCLG – Maximum Contaminant Level Goal: The level of a contaminant in drinking water, below which there is no known, or expected, risk to health. MCLGs allow for a margin of safety. MFL– million fibers per liter MRDL – Maximum residual disinfectant level: 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. MRDLG – Maximum residual disinfectant level goal: 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. mrem/year – millirems, per year (a measure of radiation absorbed by the body) NTU – Nephelometric Turbidity Units pCi/l – picocuries, per liter (a measure of radioactivity) ppm – parts, per million, or milligrams, per liter (mg/l) ppb – parts, per billion, or micrograms, per liter (ug/l) ppt – parts, per trillion, or nanograms, per liter ppq – parts, per quadrillion, or picograms, per liter PHGS – PHGS: Public Health Groundwater Standards are found in NR 140 Groundwater Quality. The concentration of the contaminant, which, if exceeded, poses a health risk and may require a system to post a public notice. RPHGS – RPHGS: Recommended Public Health Groundwater Standards: Groundwater standards proposed by the Wisconsin Department of Health Services. The concentration of a contaminant which, if exceeded, poses a health risk and may require a system to post a public notice. SMCL – Secondary drinking water standards or Secondary Maximum Contaminant Levels for contaminants that affect taste, odor or appearance of the drinking water. The SMCLs do not represent health standards. TCR – Total Coliform Rule TT – Treatment Technique: A required process intended to reduce the level of a contaminant in drinking water. Detected Contaminants Your water was tested for many contaminants last year. We are allowed to monitor for some contaminants less frequently than once a year. The following tables list only those contaminants which were detected in your water. If a contaminant was detected last year, it will appear in the following tables without a sample date. If the contaminant was not monitored last year, but was detected within the last five years, it will appear in the tables assess the potential health impacts associated with mixtures of contaminants. Hazard Index guidance for a class of contaminants or mixture of contaminants, may be determined by the U.S. EPA or Wisconsin Department of Health Services. If a Health Index is exceeded, a system may be required to post a public notice. 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 or why total coliform bacteria have been found in our water system, or both, on multiple occasions. MCL – Maximum Contaminant Level: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible, using the best available treatment technology. MCLG – Maximum Contaminant Level Goal: The level of a contaminant in drinking water, below which there is no known, or expected, risk to health. MCLGs allow for a margin of safety. MFL– million fibers per liter MRDL – Maximum residual disinfectant level: 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. MRDLG – Maximum residual disinfectant level goal: 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. mrem/year – millirems, per year (a measure of radiation absorbed by the body) NTU – Nephelometric Turbidity Units pCi/l – picocuries, per liter (a measure of radioactivity) ppm – parts, per million, or milligrams, per liter (mg/l) ppb – parts, per billion, or micrograms, per liter (ug/l) ppt – parts, per trillion, or nanograms, per liter ppq – parts, per quadrillion, or picograms, per liter PHGS – PHGS: Public Health Groundwater Standards are found in NR 140 Groundwater Quality. The concentration of the contaminant, which, if exceeded, poses a health risk and may require a system to post a public notice. RPHGS – RPHGS: Recommended Public Health Groundwater Standards: Groundwater standards proposed by the Wisconsin Department of Health Services. The concentration of a contaminant which, if exceeded, poses a health risk and may require a system to post a public notice. SMCL – Secondary drinking water standards or Secondary Maximum Contaminant Levels for contaminants that affect taste, odor or appearance of the drinking water. The SMCLs do not represent health standards. TCR – Total Coliform Rule TT – Treatment Technique: A required process intended to reduce the level of a contaminant in drinking water. Detected Contaminants Your water was tested for many contaminants last year. We are allowed to monitor for some contaminants less frequently than once a year. The following tables list only those contaminants which were detected in your water. If a contaminant was detected last year, it will appear in the following tables without a sample date. If the contaminant was not monitored last year, but was detected within the last five years, it will appear in the tables
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