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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.


January 2012
 

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 520 52 52 N/A
Bicarbonate as HCO3, mg/l 634 63 63 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 100 8 6 150*
Calcium Hardness as CaCO3, mg/l 40 2 2 N/A
Magnesium as CaCO3, mg/l 60 6 4 N/A
Calcium as Ca, mg/l 16.0 0.8 0.8 60.0*
Color, C.U. (Color Units) 31 0 0 15*
Silica as SiO2, mg/l 10.5 3.0 1.4 N/A
Conductivity as µS/cm 2,530 305 303 N/A
Iron, Fe mg/l 0.03 0.01 0.02 0.300*
Copper, Cu, mg/l < 0.070 < 0.070 < 0.070 1.300^
Manganese, Mn mg/l 0.019 0.004 0.000 0.050*
Phosphate as PO4, mg/l 0.20 0.48 0.45 5.00*
Chloride as Cl2, mg/l 500 70 60 50.0*
Fluoride, F, mg/l 1.60 1.00 1.00 2.00*
4.00^
Nitrate as NO3, mg/l 0.0 0.3 0.2 10.00^
Zinc, Zn, mg/l 0.15 0.11 0.04 5.000*
Chlorine (free CL2), mg/l 0.00 1.28 0.50 0.20@
4.00^
Lead as Pb, mg/l < 0.005 < 0.005 < 0.005 0.015^
Corrosiveness 0.23 -2.58 -2.46 N/A
pH 7.93 7.02 7.14 6.5-8.5#
Temperature, ° Celsius 19.8 19.6 18.4 N/A
Turbidity, N.T.U. 0.06 0.03 0.02 1.0^
Total Suspended Solids, mg/l 0 0 0 N/A
Total Dissolved Solids, mg/l 1,260 144 144 500.00*
Sulfate as SO4, mg/l 0 1 0 250.0*
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 January 26, 2012

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