Fort Walton Beach — 2019 Consumer Water Quality Report — reading text

our sampling plan to prevent this from reoccurring by changing our transport and delivery method of samples to the laboratory. chlorination. resulting from the presence of animals or from human activity.  2019 WATER TESTING RESULTS In the table to the left you will find many INORGANIC CONTAMINANTS terms and abbreviations, some of which you Dates of MCL Range might not be familiar. To help you better Contaminant and Unit Level sampling Violation of MCLG MCL Likely Source of Contamination of Measurement Detected understand these terms, we have provided the (mo./yr.) (Yes/No) Results Discharge of drilling wastes; discharge from metal refineries; erosion of following definitions: Barium (ppm) May 2017 No 0.35 0.005-0.35 2 2 natural deposits n/a: not applicable Erosion of natural deposits; discharge from fertilizer and aluminum ND: means not detected and indicates that the substance Fluoride (ppm) May 2017 No 1.1 0.45-1.1 4 4.0 factories. Water additive which promotes strong teeth when at the optimum was not found by laboratory analysis. level of 0.7 ppm Parts per million (ppm) or milligrams per liter (mg/l): Lead (point of entry) Residue from man-made pollution such as auto emissions and paint; lead one part by weight of analyte to one million parts by weight May 2017 No 1 ND-1 0 15 (ppb) pipe, casing, and solder of the water sample. Sodium (ppm) May 2017 No 110 35-110 n/a 160 Salt water intrusion, leaching from soil Parts per billion (ppb) or micrograms per liter (µg/l): RADIOACTIVE CONTAMINANTS one part by weight of analyte to one billion parts by weight Jan & May of the water sample. Alpha emitters (pCi/L) No 2.7 ND-2.7 0 15 Erosion of natural deposits 2017 Picocuries per liter (pCi/L): measure of the radioactivity Radium 226 +228 or Jan & May in water. No 1.36 0.4-1.36 0 5 Erosion of natural deposits combined radium (pCi/L) 2017 Action Level (AL): the concentration of a contaminant STAGE 2 DISINFECTANTS AND DISINFECTION BY-PRODUCTS . which, if exceeded, triggers treatment or other requirements MCL or which a water system must follow. Disinfectant or Dates of Range MRDL Level MCLG or MCL or Maximum Contaminant Level or MCL: the highest level Contaminant and Unit sampling of Likely Source of Contamination Violation Detected MRDLG MRDL of a contaminant that is allowed in drinking water. MCLs of Measurement (mo./yr.) Results (Yes/No) are set as close to the MCLGs as feasible using the best Chlorine (ppm) – MRDLG MRDL available treatment technology. Jan-Dec 2019 No 0.72 0.64-0.82 Water additive used to control microbes Stage 1 =4 = 4.0 Maximum Contaminant Level Goal or MCLG: the level Haloacetic Acids (five) of a contaminant in drinking water below which there is no July 2019 No 21.9 20-21.9 n/a MCL = 60 By-product of drinking water disinfection (HAA5) (ppb) known or expected risk to health. MCLGs allow for a TTHM (Total margin of safety. July 2019 No 23.9 20-23.9 n/a MCL = 80 By-product of drinking water disinfection trihalomethanes) (ppb) Maximum residual disinfectant level or MRDL: the LEAD AND COPPER (TAP WATER) highest level of a disinfectant allowed in drinking water. Dates of AL 90th No. There is convincing evidence that addition of a disinfectant Contaminant and Unit AL (Action is necessary for control of microbial contaminants. Sampling Exceeded Percentile Exceeding MCLG Likely Source of Contamination of Measurement Level) (mo./yr.) (Yes/No) Result the AL Maximum residual disinfectant level goal or MRDLG: Copper (tap water) Corrosion of household plumbing systems; erosion of natural deposits; the level of a drinking water disinfectant below which there Jun-Sept 2017 No 0.22 0 of 30 1.3 1.3 is no known or expected risk to health. MRDLGs do not (ppm) leaching from wood preservatives Lead (tap water) (ppb) Jun-Sept 2017 No 2.3 1 of 30 0 15 Corrosion of household plumbing systems; erosion of natural deposits reflect the benefits of the use of disinfectants to control microbial contaminants. Treatment Technique (TT): A required process intended to reduce the level of contamination in drinking water. Unregulated Contaminants We monitored for unregulated contaminants (UCs) in 2019 as part of a study to help the U.S. Environmental Protection Agency (EPA) determine the occurrence in drinking water of UCs and whether Contaminant Dates of sampling Level Detected Range Likely Source of or not these contaminants need to be regulated. At present, no health standards (for example, maximum (Unit of Measurement= ppb) (mo/yr) (average) Contamination contaminant levels) or likely sources have been established for UCs. However, we are required to publish Manganese April 2 & 30, 2019 0.074 ppb ND-0.67 ppb Unavailable the analytical results of our UC monitoring in our annual water quality report. All detections are shown on HAA5 April 30, 2019 4.9 ppb 4.9 ppb Unavailable the table, but if you would like a copy of all our 2019 UC data, contact this water system at the number