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Dare County Water Department 

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CAPE HATTERAS WATER PLANT
RAW, FINISHED & DISTRIBUTED TESTING

January 2009

  Anion
Well Water Raw

RO
Well Water Raw

Finished Water Quality Distributed
Water
Quality
MCL
P -  Alkalinity as CaCO3, mg/l 0 0 0 0 N/A
Total Alkalinity CaCO3, mg/l 320 280 60 62 N/A
Bicarbonate as HCO3, mg/l 150 300 74 76 N/A
Carbonate as CO3, mg/l 0 0 0 0 N/A
Hydroxide as OH, mg/l 0 0 0 0 N/A
Total Hardness as CaCO3, mg/l 260 2,560 40 40 150*
Calcium Hardness as CaCO3, mg/l 80 60 10 10 N/A
Magnesium as CaCO3, mg/l 180 2,540 30 30 N/A
Calcium as Ca, mg/l 50 340 30 30 60.0*
Color, C.U. (Color Units) 41 1 0 0 15*
Silica as SiO2, mg/l 7.990 21.000 0.011 0.010 N/A
Conductivity as µS/cm 718 17,300 494 422 N/A
Iron, Fe mg/l 0.360 0.029 0.010 0.011 0.300*
Potassium K, mg/l 7.86 8.50 1.04 1.03 N/A
Copper, Cu, mg/l < 0.070 < 0.070 < 0.070 < 0.070 1.300^
Manganese, Mn mg/l 0.028 0.168 0.009 0.003 0.050*
Phosphate as PO4, mg/l 0.22 0.23 1.45 1.65 5.00*
Chloride as Cl2, mg/l 65 5,220 100 100 250.0*
Fluoride, F, mg/l 0.32 0.28 1.00 0.99 2.00*
4.00^
Nitrate as NO3, mg/l 0 0 0 0 10.00^
Zinc, Zn, mg/l 0.811 0.122 0.110 0.110 5.000*
Chlorine (free CL2), mg/l 0.00 0.00 0.95 0.68 0.20@
4.00^
Lead as Pb, mg/l < 0.005 < 0.005 < 0.005 < 0.005 0.015^
Corrosiveness 0.22 0.35 1.39 1.14 N/A
pH 7.20 7.20 7.16 7.24 6.5-8.5#
pHs 7.42 7.48 8.55 8.32 N/A
Turbidity, NTU 0.11 0.23 0.10 0.10 1.0^
Total Suspended Solids, mg/l ----- ----- ----- ----- N/A
Total Dissolved Solids, mg/l 447 10,240 491 244 500.00*
Sulfate as SO4, mg/l 0.64 200.00 2.10 1.10 250.0*
Sodium as Na, mg/l (est.) 182 3,120 62 51 250.00^
Sulfide as S, mg/l 0 0 0 0 N/A

MCL - Maximum Contaminant Level     mg/L = parts per million (ppm)      N/A - Not Available; No Limit

* Recommended Maximum   @ Mandatory Minimum    ^ Mandatory Maximum     # Mandatory Range

Click Here For An Explanation For Each Of These Chemical Tests

Page last updated January 8, 2009

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