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State Water Resources Control Board <br />Division of Water Quality <br />GAMA Program <br />r -- <br />t • <br />•-f" Active and Standby <br />Division of Drinking Water Wells <br />2007-2017 <br />s <br />•� Arsenic <br />+ • • > 10 mg/L (CA MCL) (931) <br />• • • All Sampled Wells (9,381) <br />• <br />•*a •• ♦ • ow Regional Board Boundaries <br />\ • L j County Boundaries <br />` + • • '� • <br />• <br />• <br />l ••• %•• <br />• 10 • <br />t •• to <br />• • <br />� •• <br />• <br />• <br />• i <br />00 • n;i <br />•• <br />•••• • <br />� • �► • <br />v \ • • • <br />• �� •. <br />• J • • •go 0 00• <br />i • <br />• <br />• s#_ S• •L\ <br />It • <br />•' • <br />N Edinburgh • '��/'�' �' • j <br />�layos ul,. <br />W- _ F 0 1J <br />5 Belta:t � 17 �• <br />_re4 `— <br />I.Az ctre ler HanlNrrg 5.<s --in <br />LNspcp� <br />,IJmm�hrn t - <br />Prepared b the State Water Board, September 2017 <br />Water Boards <br />0 15 30 60, 90 120 <br />Miles <br />Active and standby public drinking water wells that had at least one detection of arsenic <br />above the MCL, 2007-2017, 931 wells. (Source: Public well data in GeoTracker GAMA). <br />Revised October 2017 8 <br />