Fort Walton Beach — 2022 Consumer Water Quality Report — reading text

radioactive material, and can pick up substances resulting from the presence of animals or from human activity.  2022 WATER TESTING RESULTS In the table to the left you will find many terms and abbreviations, some of which you INORGANIC CONTAMINANTS might not be familiar. To help you better Dates of MCL Contaminant and Unit of sampling Violation Level Range of MCLG MCL Likely Source of Contamination understand these terms, we have provided the Measurement Detected Results following definitions: (mo./yr.) (Yes/No) Discharge of drilling wastes; discharge from metal refineries; n/a: not applicable Barium (ppm) April 2020 No 0.36 0.005-0.36 2 2 erosion of natural deposits ND: means not detected and indicates that the substance Erosion of natural deposits; discharge from fertilizer and aluminum was not found by laboratory analysis. Fluoride (ppm) April 2020 No 1.15 0.51-1.15 4 4.0 factories. Water additive which promotes strong teeth when at the Parts per million (ppm) or milligrams per liter (mg/l): optimum level of 0.7 ppm one part by weight of analyte to one million parts by weight Discharge from petroleum and metal refineries; erosion of natural of the water sample. Selenium (ppb) April 2020 No 4.0 ND – 4.0 50 50 deposits; discharge from mines. Parts per billion (ppb) or micrograms per liter (µg/l): Sodium (ppm) April 2020 No 120 35-120 n/a 160 Saltwater intrusion, leaching from soil one part by weight of analyte to one billion parts by weight RADIOACTIVE CONTAMINANTS of the water sample. Jan & May Picocuries per liter (pCi/L): measure of the radioactivity Alpha emitters (pCi/L) No 2.7 ND-2.7 0 15 Erosion of natural deposits in water. 2017 Radium 226 +228 or Jan & May Action Level (AL): the concentration of a contaminant No 1.36 0.4-1.36 0 5 Erosion of natural deposits combined radium (pCi/L) 2017 which, if exceeded, triggers treatment or other requirements STAGE 2 DISINFECTANTS AND DISINFECTION BY-PRODUCTS . which a water system must follow. MCL or Maximum Contaminant Level or MCL: the highest level Disinfectant or Dates of MRDL Level Range of MCLG or MCL or of a contaminant that is allowed in drinking water. MCLs Contaminant and Unit of sampling Likely Source of Contamination Violation Detected Results MRDLG MRDL are set as close to the MCLGs as feasible using the best Measurement (mo./yr.) (Yes/No) available treatment technology. Jan-Dec Maximum Contaminant Level Goal or MCLG: the level Chlorine (ppm) Stage 1 No 0.86 0.7-1.06 MRDLG = 4 MRDL = 4.0 Water additive used to control microbes 2022 of a contaminant in drinking water below which there is no Haloacetic Acids (five) known or expected risk to health. MCLGs allow for a Aug 2022 No 8.4 1.5-8.4 n/a MCL = 60 By-product of drinking water disinfection margin of safety. (HAA5) (ppb) TTHM (Total Maximum residual disinfectant level or MRDL: the Aug 2022 No 15 11.9-15 n/a MCL = 80 By-product of drinking water disinfection trihalomethanes) (ppb) highest level of a disinfectant allowed in drinking water. LEAD AND COPPER (TAP WATER) There is convincing evidence that addition of a disinfectant Dates of AL 90th No. is necessary for control of microbial contaminants. Contaminant and Unit of AL (Action Sampling Exceeded Percentile Exceeding MCLG Likely Source of Contamination Maximum residual disinfectant level goal or MRDLG: Measurement Level) (mo./yr.) (Yes/No) Result the AL the level of a drinking water disinfectant below which there Corrosion of household plumbing systems; erosion of natural is no known or expected risk to health. MRDLGs do not Copper (tap water) (ppm) August 2020 No 0.17 0 of 30 1.3 1.3 reflect the benefits of the use of disinfectants to control deposits; leaching from wood preservatives Corrosion of household plumbing systems; erosion of natural microbial contaminants. Lead (tap water) (ppb) August 2020 No 5.2 0 of 30 0 15 deposits