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HomeMy WebLinkAboutWater Quality Report 2013 AddendumWater Quality Report Addendum A Water Quality Report was mailed to City of Georgetown water customers in May. The following is an addendum to that report with additional sampling results for Georgetown drinking water. Unregulated Contaminant Monitoring Rule (UCMR3 Rule)* Substance (units) Year Sampled Average Range of Detections Typical Source Chlorate (ppb) 2013 374 ND - 1400 Agricultural defoliant or desiccant; disinfection byproduct; and used in production of chlorine dioxide. Chromium (ppb) 2013 0.30 ND – 0.44 Naturally occurring element; used in making steel and other alloys; used for chrome plating, dyes, and pigments, leather tanning, and wood preservation Chromium (VI) (ppb) 2013 0.21 ND – 0.27 Naturally occurring element; used in making steel and other alloys; used for chrome plating, dyes, and pigments, leather tanning, and wood preservation Molybdenum (ppb) 2013 0.19 ND – 2.2 Naturally-occurring element found in ores and present in plants, animals, and bacteria; commonly used form molybdenum trioxide used as a chemical reagent. Strontium (ppb) 2013 393 120 - 980 Naturally-occurring element; historically, commercial use of strontium has been in the faceplate glass of cathode-ray tube televisions to block x-ray emissions. Vanadium (ppb) 2013 2.2 1.4 - 3 Naturally-occurring elemental metal; used as vanadium pentoxide which is a chemical intermediate and a catalyst. * Unregulated contaminants are those for which EPA has not established drinking water standards. The purpose of unregulated contaminant monitoring is to assist EPA in determining the occurrence of unregulated contaminants in drinking water and whether future regulation is warranted. A maximum contaminant level (MCL) for these substances has not been established by either state or federal regulations, nor has mandatory health effects language. (ND = not detected; ppb = parts per billion)