Fort Walton Beach — 2012 Consumer Water Quality Report — reading text

standards are aeration and chlorination. Agency’s Safe Drinking Water Hotline at (800-426- 4791).  In the table you will find many terms 2012 WATER TESTING RESULTS and abbreviations you might not be INORGANIC CONTAMINANTS familiar with. To help you better Dates of MCL Contaminant and Unit Level Range of understand these terms, we’ve provided sampling Violation MCLG MCL Likely Source of Contamination of Measurement Detected Results the following definitions: (mo./yr.) (Yes/No) Erosion of natural deposits; discharge from fertilizer and aluminum n/a: not applicable Mar & Apr Fluoride (ppm) No 1.2 0.46-1.2 4 4.0 factories. Water additive which promotes strong teeth when at the ND: means not detected and indicates that the 2011 optimum level of 0.7 ppm substance was not found by laboratory analysis. Mar & Apr Discharge of drilling wastes; discharge from metal refineries; erosion Parts per million (ppm) or milligrams per liter Barium (ppm) No 0.35 0.0051-0.35 2 2 2011 of natural deposits (mg/l): one part by weight of analyte to one million Mar &Apr parts by weight of the water sample. Sodium (ppm) No 120 36-120 n/a 160 Salt water intrusion, leaching from soil 2011 Parts per billion (ppb) or micrograms per liter Nitrate (as Nitrogen) Runoff from fertilizer use; leaching from septic tanks, sewage; (µg/l): one part by weight of analyte to one billion Aug 2012 No 0.28 ND-0.28 10 10 (ppm) erosion of natural deposits parts by weight of the water sample. Chromium (ppb) Mar & Apr 2011 No 2.2 ND-2.2 100 100 Discharge from steel and pulp mills; erosion of natural deposits Picocuries per liter (pCi/L): measure of the radioactivity in water. Lead (point of entry) Residue from man-made pollution such as auto emissions and paint; Mar & Apr 2011 No 3.1 ND-3.1 0 15 Initial Distribution System Evaluation (IDSE): (ppb) lead pipe, casing, and solder. Pollution from mining and refining operations. Natural occurrence in an important part of the Stage 2 Disinfection Nickel (ppb) Mar & Apr 2011 No 2.4 ND-2.4 NA 100 Byproducts Rule (DBPR). The IDSE is a one-time soil. study conducted by water systems to identify RADIOACTIVE CONTAMINANTS distribution system locations with high Dates of MCL concentrations of trihalomethanes (THMs) and Contaminant and Unit Level Range of sampling Violation MCLG MCL Likely Source of Contamination haloacetic acids (HAAs). Water systems will use of Measurement Detected Results (mo./yr.) (Yes/No) results from the IDSE, in conjunction with their Alpha emitters (pCi/L) April 2008 No 1.3 ND-1.3 0 15 Erosion of natural deposits Stage 1 DBPR compliance monitoring data, to STAGE 1 DISINFECTANTS AND DISINFECTION BY-PRODUCTS select compliance monitoring locations for the MCL or Stage 2 DBPR. Disinfectant or Dates of MRDL Level Range of MCLG or MCL or Action Level (AL): the concentration of a Contaminant and Unit sampling Likely Source of Contamination Violation Detected Results MRDLG MRDL contaminant which, if exceeded, triggers treatment of Measurement (mo./yr.) (Yes/No) or other requirements which a water system must MRDLG MRDL follow. Chlorine (ppm) Jan-Dec 2012 No 0.72 0.49-0.87 Water additive used to control microbes Maximum Contaminant Level or MCL: the =4 = 4.0 highest level of a contaminant that is allowed in Haloacetic Acids (five) drinking water. MCLs are set as close to the Jul 2012 No 4.9 4.3-5.3 n/a MCL = 60 By-product of drinking water disinfection (HAA5) (ppb) MCLGs as feasible using the best available TTHM (Total treatment technology. Jul 2012 No 19.8 13.6-30.9 n/a MCL = 80 By-product of drinking water disinfection trihalomethanes) (ppb) Maximum Contaminant Level Goal or MCLG: LEAD AND COPPER (TAP WATER) the level of a contaminant in drinking water below Dates of AL 90th No. which there is no known or expected risk to health. Contaminant and Unit AL (Action MCLGs allow for a margin of safety. Sampling Exceeded Percentile Exceeding MCLG Likely Source of Contamination of Measurement Level) (mo./yr.) (Yes/No) Result the AL Maximum residual disinfectant level or MRDL: Copper (tap water) Corrosion of household plumbing systems; erosion of natural the highest level of a disinfectant allowed in Jun-Sept 2011 No 0.21 0 of 30 1.3 1.3 drinking water. There is convincing evidence that (ppm) deposits; leaching from wood preservatives