Hi Nicole First of all I ...

Hi Nicole

First of all I would like to start my opinion by saying this "A stitch in time saves nine". 

I recommend you to analyze the water sample for drinking water standards after flushing enoughly. Even though it is costly, however, I think this is a minimum investment for your future health and safety because there are many uncertainties to say water quality without sample analysis.

And....

Flushing the wellbore is an important process before use. A long-resting borehole is subject to have lots of chemical precipitation(scale) and biofouling in it, especially on the bottom of the borehole and dead zone in the borehole where is far from or between the major groundwater inlet and outlet. I've seen lots of those kind of wells using borehole camera. It is generally recommended  physical agitation such as air jetting, surging, swabbing and brushing or chemical agitation by injecting 15% HCl or 50-100 mg/L of Cl2 before flushing out. but budget problem.....At least I suggest flushing the borehole by moving the pump up and down.

Remember the flushing is an process only to remove any existing contaminants within and closely sorrounding the borehole. Therefore, if you want to continue to use that well from now on, check the potential contamination source around the well, especially up-gradient area, such as agricultrual field, stock farm, private cesspool and so on. Groundwater velocity is very slow compared to surface water. So if there are any potential contaminant source around you, I recommend you to analyze the water sample periodically like every 2-3 year according to any regulations in your country.  If it is remote area as you say, the only thing you may concern about is contaminants from existing borehole materials which can remove by flushing like above and natural contaminants such as asenic, high concentration of iron which come from sedimentary medium. If the geological medium is granite, some radioactive component can be issue. Once water analysis report is safe with these natural contaminants, you don't worry about these any more from now on.

In many cases, groundwater in remote area far from artifical contaminant source is safe to drink without any treatment. But health and safety cannot be emphasized enough. If you know any existing contaminant in water, you can choose a proper, cost-effective treatment method for drinking out of numerous commercial products.

I hope the groundwater in your well would be clean enough to drink without any treatment.