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Arsenic Occurrence in Groundwater in Orange County

Arsenic not detected above detection limit. Detected arsenic between 1 and 9.99 ug/L (below EPA MCL). Detected arsenic level equal to or above EPA MCL of 10 ug/L. Arsenic Occurrence in Groundwater in Orange County.

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Arsenic Occurrence in Groundwater in Orange County

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  1. Arsenic not detected above detection limit Detected arsenic between 1 and 9.99 ug/L (below EPA MCL) Detected arsenic level equal to or above EPA MCL of 10 ug/L Arsenic Occurrence in Groundwater in Orange County Arsenic occurs naturally and has been detected in well water in Orange County. Long-term consumption of low levels of arsenic may pose health risks to humans. Arsenic consumption has been linked to skin, bladder, lung, kidney, nasal, liver and prostate cancer, as well as other non-cancerous effects. The U.S. Environmental Protection Agency (EPA) recently lowered the drinking water standard, termed the maximum contaminant level (MCL), for arsenic in water to 10 micrograms per liter (ug/L) for public drinking water systems. The EPA's maximum contaminant level goal (MCLG) for arsenic in drinking water is 0 ug/L.  This means that according to the EPA, water intended for human consumption would ideally contain no detectable arsenic. If you receive your water from a private well, you may want to have your water tested for arsenic. If you would like to find out how to have your well tested, contact the Orange County Health Department - Environmental Health Section at 919-245-2360. General areas of potential arsenic detection in groundwater. Arsenic does occur outside of indicated area. Arsenic Concentrations in Groundwater (micrograms per liter- ug/L) Data Sources: Arsenic in groundwater data from the North Carolina Department of Health and Human Services (NCDHHS) Laboratory through 2005. Acknowledgements: County map with arsenic data provided by North Carolina Geological Survey. Joshua Tootoo, Associate in Research, Duke University, Children’s Environmental Health Initiative, provided geo-located groundwater arsenic data to the North Carolina Geological Survey.

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