Fort Walton Beach — 2013 Consumer Water Quality Report — reading text

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 Chromium (ppb) Mar & Apr 2011 No 2.2 ND-2.2 100 100 Discharge from steel and pulp mills; erosion of natural deposits (µg/l): one part by weight of analyte to one billion parts by weight of the water sample. 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 Picocuries per liter (pCi/L): measure of the (ppb) lead pipe, casing, and solder. radioactivity in water. Pollution from mining and refining operations. Natural occurrence in Nickel (ppb) Mar & Apr 2011 No 2.4 ND-2.4 NA 100 Initial Distribution System Evaluation (IDSE): soil. an important part of the Stage 2 Disinfection RADIOACTIVE CONTAMINANTS Byproducts Rule (DBPR). The IDSE is a one-time Dates of MCL study conducted by water systems to identify Contaminant and Unit Level Range of sampling Violation MCLG MCL Likely Source of Contamination distribution system locations with high of Measurement Detected Results (mo./yr.) (Yes/No) concentrations of trihalomethanes (THMs) and Alpha emitters (pCi/L) April 2008 No 1.3 ND-1.3 0 15 Erosion of natural deposits haloacetic acids (HAAs). Water systems will use STAGE 2 DISINFECTANTS AND DISINFECTION BY-PRODUCTS * Not applicable until 4 quarters have been sampled. results from the IDSE, in conjunction with their MCL or Stage 1 DBPR compliance monitoring data, to Disinfectant or Dates of MRDL Level Range of MCLG or MCL or select compliance monitoring locations for the Contaminant and Unit sampling Likely Source of Contamination Violation Detected Results MRDLG MRDL Stage 2 DBPR. of Measurement (mo./yr.) (Yes/No) Action Level (AL): the concentration of a MRDLG MRDL contaminant which, if exceeded, triggers treatment Chlorine (ppm) Jan-Dec 2013 No 0.73 0.54-0.89 Water additive used to control microbes or other requirements which a water system must =4 = 4.0 follow. Haloacetic Acids (five) Maximum Contaminant Level or MCL: the Nov 2013 NA* NA* 2.8-3.3 n/a MCL = 60 By-product of drinking water disinfection (HAA5) (ppb) highest level of a contaminant that is allowed in TTHM (Total drinking water. MCLs are set as close to the Nov 2013 NA* NA* 5.42-24.6 n/a MCL = 80 By-product of drinking water disinfection trihalomethanes) (ppb) MCLGs as feasible using the best available In 2013, due to an administrative oversight, our office failed to timely sample required annual sampling for TTHM and HAA5. However, monitoring treatment technology. was completed in 2012 and will be sampled again in 2014. This violation has no impact on the quality of the water our customers received, but the Maximum Contaminant Level Goal or MCLG: risk to public health is unknown. We have established a report tracking file to ensure that all reporting requirements are met in the future. the level of a contaminant in drinking water below which there is no known or expected risk to health. LEAD AND COPPER (TAP WATER) MCLGs allow for a margin of safety. Dates of AL 90th No. Contaminant and Unit AL (Action Maximum residual disinfectant level or MRDL: Sampling Exceeded Percentile Exceeding MCLG Likely Source of Contamination of Measurement Level) the highest level of a disinfectant allowed in (mo./yr.) (Yes/No) Result the AL drinking water. There is convincing evidence that Copper (tap water) Corrosion of household plumbing systems; erosion of natural addition of a disinfectant is necessary for control of Jun-Sept 2011 No 0.21 0 of 30 1.3 1.3 (ppm) deposits; leaching from wood preservatives microbial contaminants. Lead (tap water) (ppb) Jun-Sept 2011 No 4.80 0 of 30 0 15 Corrosion of household plumbing systems; erosion of natural deposits Maximum residual disinfectant level goal or