Fort Walton Beach — 2023 Consumer Water Quality Report — reading text

chlorination. ground, it dissolves naturally occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity.  2023 WATER TESTING RESULTS In the table to the left you will find many terms and abbreviations, some of which you might INORGANIC CONTAMINANTS not be familiar. To help you better understand Dates of MCL Contaminant and Unit of sampling Violation Level Range of MCLG MCL Likely Source of Contamination these terms, we have provided the following Measurement Detected Results definitions: (mo./yr.) (Yes/No) Discharge of drilling wastes; discharge from metal refineries; n/a: not applicable Barium (ppm) April 2023 No 0.35 0.0038-0.35 2 2 erosion of natural deposits ND: means not detected and indicates that the substance was Erosion of natural deposits; discharge from fertilizer and aluminum not found by laboratory analysis. Fluoride (ppm) April 2023 No 0.94 0.46-0.94 4 5 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 Sodium (ppm) April 2023 No 120 43-120 n/a 160 Saltwater intrusion, leaching from soil of the water sample. RADIOACTIVE CONTAMINANTS Parts per billion (ppb) or micrograms per liter (µg/l): one Jan & May part by weight of analyte to one billion parts by weight of Alpha emitters (pCi/L) No 2.7 ND-2.7 0 15 Erosion of natural deposits the water sample. 2017 Radium 226 +228 or Jan & May Picocuries per liter (pCi/L): measure of the radioactivity in No 1.49 0.4-1.49 0 5 Erosion of natural deposits water. combined radium (pCi/L) 2017 STAGE 2 DISINFECTANTS AND DISINFECTION BY-PRODUCTS . Action Level (AL): the concentration of a contaminant MCL or which, if exceeded, triggers treatment or other requirements Disinfectant or Dates of MRDL Level Range of MCLG or MCL or which a water system must follow. Contaminant and Unit of sampling Likely Source of Contamination Violation Detected Results MRDLG MRDL Maximum Contaminant Level or MCL: the highest level Measurement (mo./yr.) (Yes/No) of a contaminant that is allowed in drinking water. MCLs Jan-Dec are set as close to the MCLGs as feasible using the best Chlorine (ppm) Stage 1 No 0.95 0.8-1.16 MRDLG = 4 MRDL = 4.0 Water additive used to control microbes 2023 available treatment technology. Haloacetic Acids (five) Maximum Contaminant Level Goal or MCLG: the level Aug 2023 No 21.1 1.2-21.1 n/a MCL = 60 By-product of drinking water disinfection (HAA5) (ppb) of a contaminant in drinking water below which there is no TTHM (Total known or expected risk to health. MCLGs allow for a Aug 2023 No 77.7 9.5-77.7 n/a MCL = 80 By-product of drinking water disinfection margin of safety. trihalomethanes) (ppb) LEAD AND COPPER (TAP WATER) Maximum residual disinfectant level or MRDL: the Dates of AL 90th No. highest level of a disinfectant allowed in drinking water. Contaminant and Unit of AL (Action There is convincing evidence that addition of a disinfectant Sampling Exceeded Percentile Exceeding MCLG Likely Source of Contamination Measurement Level) is necessary for control of microbial contaminants. (mo./yr.) (Yes/No) Result the AL Corrosion of household plumbing systems; erosion of natural Maximum residual disinfectant level goal or MRDLG: Copper (tap water) (ppm) June 2023 No 0.1 0 of 30 1.3 1.3 the level of a drinking water disinfectant below which there deposits; leaching from wood preservatives Corrosion of household plumbing systems; erosion of natural is no known or expected risk to health. MRDLGs do not Lead (tap water) (ppb) June 2023 No 1.7 0 of 30 0 15 reflect the benefits of the use of disinfectants to control deposits microbial contaminants.