It is possible to put in a water meter that will generate a signal to a chlorinator pump.
You should have a water test. If there are coliform bacteria, that needs to be dealt with by disinfection. If it is caused by work on the well, the well can be treated. If it is present in the source water, then it must be treated to ensure that you and the other users get safe water.
The best system would be to put the chlorinator at the pump control site.