NW is best for septic tank but if not possible can septic tank place in east of plot
You may also refer to the similar question answered earlier:
septic tank is in East corner so is it right side?
Plan from you would obviously help here.
What's the effect of east corner septic tank?
I'm currently in the process of building a bungalow. Septic tank in this house is placed below the entrance.
Where the Septic Tank should be placed according to Vastu?