EDR Vs ​RO for Water Treatment

What is the ​best water ​treatment ​method for ​water with the ​following given  ​specifications ​to use water ​for Drinking ​and Cooling ​purposes?  ​

We get our ​water from two ​brackish water ​surface wells.​  ​

Which method ​will give ​better results -​ Electrodialysis ​Reversal or ​Reverse Osmosis ​and why? ​

Water Specification

Well 1 -

For Drinking water 

Well 2 -

Plant cooling

pH

7.35

7.42

conductivity ​ [µS/​c]

5290

5057

Salinity (as ​NaCl)  [mg/​L]

2138

1981

Chlorides (Cl ​-)  [mg/L] ​

1453

1200

Sodium (Na+)  [mg/L]

685

781

Total Hardness  [F.D.]

19

15

Calcium (Ca2+)  [mg/L]

40

30

Magnesium (​Mg2+)  [mg/​L]

21

18

B.O.D  [mg/L]

60

60

Carbonates (​CO3-2)  [​mg/L] ​

Traces

Traces

Bicarbonates (​HCO3)  [mg/​L]

159

146

Suphates (SO4-​2)  [mg/L] ​

940

840

Nitrites (NO3-​)  [mg/L] ​

1.6

2.2

Nitrites (NO2-​)  [mg/L] ​

0.021

0.035

Silicate (​SiO2)  [mg/​L]

17

15

Ammonia (NH3)  [mg/L]

0.64

1

T.SUSP Solids  [mg/L]

6

2

T. Dissolved ​Solids (T.D.S) ​ [mg/L] ​

3386

3236

Turbidity  [FTU]

0.004

0.01

Dissolved (​Fe2+)  [mg/​L]

0.08

0.45

Chemicals  [ppm]

0.5

0.35