@kmgeis
This topic has been discussed here many times over the years and all have their own opinions and methods.
We are on a deep well and the first thing we did when we moved here 7 years ago was have the water tested by a laboratory, the one that our local filling station uses for their monthly health testing.
There were about 14 different analyses that I asked the lab to perform ranging from most importantly E-coli and Coliform bacteria through to different metal and salt contents, all bar the salt level came in under the WHO safe recommendations and the salt level was only marginally higher than normal,,,,, probably because the well is around 120 metres from the ocean but fed underground from the mountains behind us.
From memory our water test cost a little under P4K
I did look at a treatment plant to run the house prior to us moving here but once we had the water tested we didn't bother as it was going to cost around P120K plus the ongoing maintenance and replacement filter costs, UV globes etc. There are much cheaper systems available for single point usage that might be worth considering. For us we simply have our blue and round bottles refilled at 25 pesos each, we have a refrigerated/heated water dispenser in the dining room for us and guests and a blue container on the kitchen bench for the kettle, cooking, ice making etc.
The well water we use for dishes, laundry, bathrooms and gardens, we use the well water for brushing teeth and we are all still fit well and healthy.
Our local water refill station is also a very large sari store as in walk in and select the things you need, we always take 3 to 4 water bottles and buy many other needs as required, fizzy drinks, alcohol, LPG, snacks, some pantry products etc.
I just saw your latest post Km. Can I ask? is it a well or a bore? was it drilled deep enough? What is the water delivery per minute? Yes you should have it tested with a reputable lab that handles water all the time and can be found simply by asking one or 2 of your refill stations, if they are licensed it is mandatory for them the be inspected and tested every 3/4 weeks, they will point you in the right direction.
Good luck.
Cheers, Steve.