Learn about water filters and drinking water systems at water filter university. We have a UV system from H2O Splash which is part of water filter university. We also have two incoming 5 micron filters to filter all our water. We also have a 0.5 micron coconut charcoal filter from filters fast - website addresses below. The UV is a one gallon per minute for drinking water only - costs about $100 - should kill all bad stuff. We do not have reverse osmosis (RO) as too much water required. Takes a bit of effort to create a system for safe to drink water. Requires 120volts AC for the UV. The coconut 0.5 will take out most bad taste. Adding bleach can help if the bleach says it is chlorine based on the label. US Clorox for example - not all bleach has chlorine.
http://www.waterfilteruniversity.com/
http://www.h2osplashwaterfilters.com/ulvistun.html
https://www.filtersfast.com/P-Hydronix-SMCB-2510-Water-Filter.asp