Fort Walton Beach — 2018 Consumer Water Quality Report — reading text

chlorination. resulting from the presence of animals or from human activity.  2018 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. Nitrate (as Nitrogen) Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of Parts per billion (ppb) or micrograms per liter (µg/l): April 2018 No 0.39 ND-0.39 10 10 (ppm) natural deposits one part by weight of analyte to one billion parts by weight Sodium (ppm) May 2017 No 110 35-110 n/a 160 Salt water intrusion, leaching from soil of the water sample. RADIOACTIVE CONTAMINANTS Picocuries per liter (pCi/L): measure of the radioactivity Jan & May in water. Alpha emitters (pCi/L) No 2.7 ND-2.7 0 15 Erosion of natural deposits 2017 Action Level (AL): the concentration of a contaminant Radium 226 +228 or Jan & May which, if exceeded, triggers treatment or other requirements No 1.49 0.4-1.49 0 5 Erosion of natural deposits combined radium (pCi/L) 2017 which a water system must follow. STAGE 2 DISINFECTANTS AND DISINFECTION BY-PRODUCTS . Maximum Contaminant Level or MCL: the highest level MCL or of a contaminant that is allowed in drinking water. MCLs Disinfectant or Dates of Range MRDL Level MCLG or MCL or are set as close to the MCLGs as feasible using the best Contaminant and Unit sampling of Likely Source of Contamination Violation Detected MRDLG MRDL available treatment technology. of Measurement (mo./yr.) Results (Yes/No) Maximum Contaminant Level Goal or MCLG: the level Chlorine (ppm) – MRDLG MRDL of a contaminant in drinking water below which there is no Jan-Dec 2018 No 0.71 0.59-0.78 Water additive used to control microbes Stage 1 =4 = 4.0 known or expected risk to health. MCLGs allow for a Haloacetic Acids (five) margin of safety. July 2018 No 9.6 5.7-9.6 n/a MCL = 60 By-product of drinking water disinfection (HAA5) (ppb) Maximum residual disinfectant level or MRDL: the TTHM (Total 23.32- highest level of a disinfectant allowed in drinking water. July 2018 No 26.98 n/a MCL = 80 By-product of drinking water disinfection trihalomethanes) (ppb) 26.98 There is convincing evidence that addition of a disinfectant LEAD AND COPPER (TAP WATER) is necessary for control of microbial contaminants. Dates of AL 90th No. Maximum residual disinfectant level goal or MRDLG: Contaminant and Unit AL (Action Sampling Exceeded Percentile Exceeding MCLG Likely Source of Contamination the level of a drinking water disinfectant below which there of Measurement Level) (mo./yr.) (Yes/No) Result the AL is no known or expected risk to health. MRDLGs do not Copper (tap water) Corrosion of household plumbing systems; erosion of natural deposits; reflect the benefits of the use of disinfectants to control Jun-Sept 2017 No 0.22 0 of 30 1.3 1.3 microbial contaminants. (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 Unregulated Contaminants We monitored for unregulated contaminants (UCs) in 2018 as part of a study to help the U.S. Environmental Protection Agency (EPA) determine the occurrence in drinking water of UCs and whether or not these contaminants Contaminant Dates of sampling Level Detected Range Likely Source of need to be regulated. At present, no health standards (for example, maximum contaminant levels) or likely sources (Unit of Measurement= ppb) (mo/yr) (average) Contamination have been established for UCs. However, we are required to publish the analytical results of our UC monitoring in Manganese October 22 2018 0.336 ppb ND-1.8 ppb Unavailable our annual water quality report. All detections are shown on the table, but if you would like a copy of all our 2018 UC data, contact this water system at the number provided in this report. HAA5 October 22 2018 6.09 ppb 4.57-7.61 ppb Unavailable We will also be monitoring the first 6- month period of 2019 for UCs. They will be published as required in our 2020 Water Quality