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Dare County Water Department 

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RAW, FINISHED & DISTRIBUTED ANALYSIS

Raw Water: Well water before any treatment
Finished Water: Product water immediately down stream of the RO process
Distributed Water: Product water after it has left our 1.0 MG storage tank.


October 2008
 

CHEMICAL

WELL
WATER
RAW

FINISHED WATER QUALITY

DISTRIBUTED
WATER 
QUALITY

MCL

P - Alkalinity as CaCO3, mg/l 0 0 0 N/A
Total Alkalinity CaCO3, mg/l 304 0 0 N/A
Bicarbonate as HCO3, mg/l 371 0 0 N/A
Carbonate as CO3, mg/l 0 0 0 N/A
Hydroxide as OH, mg/L 0 0 0 N/A
Total Hardness as CaCO3, mg/l 96 10 6 150*
Calcium Hardness as CaCO3, mg/l 30 2 2 N/A
Magnesium as CaCO3, mg/l 66 8 4 N/A
Calcium as Ca, mg/l 12.0 0.8 0.8 60.0*
Color, C.U. (Color Units) 20 1 1 15*
Silica as SiO2, mg/l 29.4 4.0 2.8 N/A
Conductivity as µS/cm 2,720 309 313 N/A
Iron, Fe mg/l 0.039 0.010 0.016 0.300*
Potassium K, mg/l 24.0 1.2 1.2 N/A
Copper, Cu, mg/l < 0.070 < 0.070 < 0.070 1.300^
Manganese, Mn mg/l 0.002 0.003 0.001 0.050*
Phosphate as PO4, mg/l 0.314 0.92 1.05 5.00*
Chloride as Cl2, mg/l 570 60 70 50.0*
Fluoride, F, mg/l 1.77 1.01 1.00 2.00*
4.00^
Nitrate as NO3, mg/l 0 0 0 10.00^
Zinc, Zn, mg/l 0.035 0.311 0.309 5.000*
Chlorine (free CL2), mg/l 0.00 1.32 0.47 0.20@
4.00^
Lead as Pb, mg/l < 0.005 < 0.005 < 0.005 0.015^
Corrosiveness -0.26 -3.69 -3.51 N/A
pH 7.84 6.91 7.09 6.5-8.5#
Temperature, ° Celsius 20.7 20.6 20.6 N/A
Turbidity, N.T.U. 0.05 0.03 0.03 1.0^
Total Suspended Solids, mg/l 0.0004 0.0000 0.0000 N/A
Total Dissolved Solids, mg/l 1,370 147 149 500.00*
Sulfate as SO4, mg/l 0.4 0.3 0.4 250.0*
Sodium as Na, mg/l (est.) 357.19 22.38 36.36 250.00^
Sulfide as S, mg/l 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 October 15, 2008

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