Fort Walton Beach — 2016 Consumer Water Quality Report — reading text

Aquifer, the only treatments required to meet Federal and State standards are aeration and chlorination.  In the table you will find many terms and abbreviations you might not be 2016 WATER TESTING RESULTS familiar with. To help you better INORGANIC CONTAMINANTS understand these terms, we’ve provided Dates of MCL the following definitions: Contaminant and Unit of Range of sampling Violation Level Detected MCLG MCL Likely Source of Contamination Measurement Results n/a: not applicable (mo./yr.) (Yes/No) Fluoride (ppm) Jan 2014 No 1.3 0.5-1.3 4 4.0 Erosion of natural deposits; discharge from fertilizer and aluminum factories. Water ND: means not detected and indicates that the additive which promotes strong teeth when at the optimum level of 0.7 ppm substance was not found by laboratory analysis. Discharge of drilling wastes; discharge from metal refineries; erosion of natural Barium (ppm) Jan 2014 No 0.36 0.005-0.36 2 2 Parts per million (ppm) or milligrams per liter deposits (mg/l): one part by weight of analyte to one million Sodium (ppm) Jan 2014 No 120 38-120 n/a 160 Salt water intrusion, leaching from soil parts by weight of the water sample. RADIOACTIVE CONTAMINANTS Parts per billion (ppb) or micrograms per liter Dates of MCL (µg/l): one part by weight of analyte to one billion Contaminant and Unit of Range of Measurement sampling Violation Level Detected Results MCLG MCL Likely Source of Contamination parts by weight of the water sample. (mo./yr.) (Yes/No) Picocuries per liter (pCi/L): measure of the Radium 226 +228 or Jan 2014 No 1.1 0.3-1.1 0 5 Erosion of natural deposits radioactivity in water. combined radium (pCi/L) STAGE 2 DISINFECTANTS AND DISINFECTION BY-PRODUCTS . Action Level (AL): the concentration of a contaminant which, if exceeded, triggers treatment MCL or Disinfectant or Dates of or other requirements which a water system must MRDL Range of MCLG or MCL or Contaminant and Unit of sampling Level Detected Likely Source of Contamination follow. Violation Results MRDLG MRDL Measurement (mo./yr.) (Yes/No) Maximum Contaminant Level or MCL: the highest level of a contaminant that is allowed in MRDLG MRDL Chlorine (ppm) – Stage 1 Jan-Dec 2016 No 0.79 0.53-0.92 =4 = 4.0 Water additive used to control microbes drinking water. MCLs are set as close to the MCLGs as feasible using the best available Haloacetic Acids (five) treatment technology. Jan & July 2016 No 11.1 1.1-11.1 n/a MCL = 60 By-product of drinking water disinfection (HAA5) (ppb) Maximum Contaminant Level Goal or MCLG: TTHM (Total Jan & July 2016 No 40.8 10.8-40.8 n/a MCL = 80 By-product of drinking water disinfection the level of a contaminant in drinking water below trihalomethanes) (ppb) which there is no known or expected risk to health. LEAD AND COPPER (TAP WATER) MCLGs allow for a margin of safety. No. Maximum residual disinfectant level or MRDL: Contaminant and Unit of Dates of Sampling AL Exceeded 90th Percentile AL (Action Exceeding MCLG Likely Source of Contamination the highest level of a disinfectant allowed in Measurement (mo./yr.) (Yes/No) Result Level) the AL drinking water. There is convincing evidence that Corrosion of household plumbing systems; erosion of natural deposits; leaching from addition of a disinfectant is necessary for control of Copper (tap water) (ppm) Jun-Sept 2014 No 0.17 0 of 30 1.3 1.3 microbial contaminants. wood preservatives Maximum residual disinfectant level goal or Lead (tap water) (ppb) Jun-Sept 2014 No 3.3 0 of 30 0 15 Corrosion of household plumbing systems; erosion of natural deposits MRDLG: 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