Is there a forum where one can ask about EMF waves?

Maybe under "health" you should post this.  

"Taller than the usual wooden pole" is probably about 28,000 Volts.  ("The usual" wooden pole carries about 14,000 Volts.)

As always, field strength drops off as the square of distance.  The phone in your pocket has a greater field strength in your body than the power lines outside your house.

The voltage of the lines can be roughly determined by how many insulators separate a wire from the support structure.  IIRC, 3 or 4 insulators means a 69KV line, the lowest voltage level for transmission.  Anything less than this number means the lines are at distribution level, like 25KV or less.  The magnetic field measured at some distance from the lines will depend on the distance from the wires and how much current is flowing through the wires.  And in the case of 3 phase power, how well balanced the loads are.  So one could measure different magnetic fields at different times of the day when the load has changed.

I'd trust the meter.  If it's telling you the field strength is low, then it's low. 

Any magnetic field you can measure represents losses in the lines.  Teh power company does not want losses, so designs the distribution system to minimize them.  It is not surprising that you see very little stray EMF.