I agree with everyone on verifying the bonding/grounding on the system.
We have wells installed all over the place, most with minimal electronics, but others with varying degrees of electronics. Our well casings are metal and in most cases properly bonded and surge protected with cheap systems.
I have only heard of problems on one system (a water treatment plant) as far as losing electronics which occured reportedly everytime a lightning storm came by. I finally made it to the site last year to find the poorest excuse for a grounding electrode system at the storage tank location (hardwired transmitter electronics located at that location).
Though I have not followed up on the system, I usually hear immediately if things did not work.
