Water Systems for Rural Properties
You should inform yourself about the quality of the water supply as well as the quantity. Water samples can be sent to laboratories for testing and a qualified person may be able to inspect the well for you and test the quantity of water available to the household.
If a water test does not pass there may be solutions available such as filtration systems.
The BC Government has lots of good info online. Here are a few useful links:
Water Protection and Sustainability Branch
Northern Health Drinking Water Safety
Water Well Disinfection