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Well Water & Health

Maps by Contaminant Name

These maps provide a visual tool for understanding groundwater contamination across North Carolina and potential public health concerns in individual counties. They represent the distribution of certain contaminants found in North Carolina private well water tested by the North Carolina State Laboratory of Public Health from 1998-2010. Each map includes a brief description of the contaminant, the average concentration of the contaminant detected, and any available U.S. Evironmental Protection Agency (EPA) Toxics Release Inventory data that may indicate possible sources of contamination.

Learn more about the project that compiled these maps, the data, data sources, calculations, and mapping techniques used in these reports by visiting the University of North Carolina at Chapel Hill's Superfund Research Program website.


A

  • Arsenic
    • Concentration of Arsenic Detected in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 432KB)
    • 2010 (PDF, 433KB)

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B

  • Barium
    • Concentration of Barium Detected in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 340KB)
    • 2010 (PDF, 339KB)
  • Benzene
    • Concentration of Benzene Detected in N.C. Private Well Water (µg/L), 2000-2010 (PDF, 331KB)
    • 2010 (PDF, 332KB)

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C

  • Cadmium
    • Concentration of Cadmium Detected in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 319KB)
    • 2010 (PDF, 319KB)
  • cis-1,2-Dichloroethane (c-DCE)
    • Concentration of c-DCE Detected in N.C. Private Well Water (µg/L), 2004-2010 (PDF, 332KB)
    • 2010 (PDF, 331KB)
  • Chromium
    • Concentration of Chromium Detected in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 437KB)
    • 2010 (PDF, 325KB)
  • Copper
    • Concentration of Copper Detected in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 329KB)
    • 2010 (PDF, 441KB)

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D

  • 1,2-Dibromoethane (ethylene dibromide)
    • Concentration of 1,2-Dibromoethane Detected in N.C. Private Well Water (µg/L), 2000-2010 (PDF, 346KB)
    • 2010 (PDF, 353KB)
  • 1,2-Dichloropropane
    • Concentration of 1,2-Dichloropropane Detected in N.C. Private Well Water (µg/L), 2000-2010 (PDF, 350KB)
    • 2010 (PDF, 356KB)

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E

  • Ethylbenzene
    • Concentration of Ethylbenzene Detected in N.C. Private Well Water (µg/L), 2000-2010 (PDF, 333KB)
    • 2010 (PDF, 354KB)
  • Ethylene dibromide (See 1,2-Dibromomethane under D)

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F-G-H

  • Fluoride
    • Concentration of Fluoride Detected in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 465KB)
    • 2010 (PDF, 464KB)

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I-J-K

  • Iron
    • Concentration of Iron Detected in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 334KB)
    • 2010 (PDF, 332KB)
  • Isopropyl Ether
    • Concentration of Isopropyl Ether in N.C. Private Well Water (µg/L), 2000-2010 (PDF, 345KB)
    • 2010 (PDF, 345KB)

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L

  • Lead
    • Concentration of Lead in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 338KB)
    • 2010 (PDF, 337KB)

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M

  • Magnesium
    • Concentration of Magnesium in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 333KB)
    • 2010 (PDF, 331KB)
  • Manganese
    • Concentration of Manganese in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 327KB)
    • 2010 (PDF, 325KB)
  • Mercury
    • Concentration of Mercury in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 321KB)
    • 2010 (PDF, 321KB)
  • Methyl t-Butyl Ether (MTBE)
    • Concentration of MTBE in N.C. Private Well Water (µg/L), 2004-2010 (PDF, 334KB)
    • 2010 (PDF, 335KB)

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N-O

  • Nitrates
    • Concentration of Nitrates in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 333KB)
    • 2010 (PDF, 344KB)
  • Nitrites
    • Concentration of Nitrites in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 345KB)
    • 2010 (PDF, 334KB)

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P-Q-R

  • pH range 6.5 to 8.5 (acidity/alkalinity)
    • pH Detected in NC Private Well Water, Average 1998-2010 (PDF, 457KB)
    • 2010 (PDF, 457KB)
  • PCE (See Tetrachloroethylene under T)

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S

  • Selenium
    • Concentration of Selenium in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 333KB)
    • 2010 (PDF, 333KB)
  • Silver
    • Concentration of Silver in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 466KB)
    • 2010 (PDF, 333KB)
  • Sodium
    • Concentration of Sodium in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 335KB)
    • 2010 (PDF, 334KB)

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T-U

  • Tetrachloroethylene (PCE)
    • Concentration of PCE in N.C. Private Well Water (µg/L), 2004-2010 (PDF, 331KB)
    • 2010 (PDF, 331KB)
  • Toluene
    • Concentration of Toluene in N.C. Private Well Water (µg/L), 2000-2010 (PDF, 374KB)
    • 2010 (PDF, 364KB)
  • Trans-1,2-dichloroethane (t-DCE)
    • Concentration of Trans-1,2-dichloroethane in N.C. Private Well Water (µg/L), 2004-2010 (PDF, 340KB)
    • 2010 (PDF, 339KB)
  • Trichloroethylene (TCE)
    • Concentration of TCE in N.C. Private Well Water (µg/L), 2004-2010 (PDF, 340KB)
    • 2010 (PDF, 340KB)

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V

  • Vinyl Chloride
    • Concentration of Vinyl Chloride in N.C. Private Well Water (µg/L), 2004-2010 (PDF, 344KB)
    • 2010 (PDF, 343KB)

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X-Y

  • Xylenes (Total Xylenes)
    • Concentration of Xylenes in N.C. Private Well Water (µg/L), 2000-2010 (PDF, 360KB)
    • 2010 (PDF, 353KB)

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Z

  • Zinc
    • Concentration of Zinc in N.C. Private Well Water (µg/L), 1998-2010 (PDF, 330KB)
    • 2010 (PDF, 329KB)

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