Contaminant Action Level MCLG 90th Percentile Level Found # of Results Sample Date (if prior to 2023) Violation Typical Source of Contaminant (units) Copper (ppm) AL = 1.3 1.3 No Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives Lead (ppb) AL = 15 0 No Corrosion of household plumbing systems; erosion of natural deposits Contaminant Action Level MCLG 90th Percentile Level Found # of Results Sample Date (if prior to 2023) Violation Typical Source of Contaminant (units) Copper (ppm) AL = 1.3 1.3 No Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives Lead (ppb) AL = 15 0 No Corrosion of household plumbing systems; erosion of natural deposits