Water purification and water sterilization are two different subjects with appropriate Q&A.
The "Joker in The Deck" with your situation is lack of water. My system has a high fe count ion exchange softener, followed by 20 ppm RO followed by ozone for contained storage for drinking and cooking. The effluent goes to the garden. But I practice strict water conservation. The citrus and garden get straight well water. Floors get mopped with well water. Windows get cleaned with softened water. I bathe in softened water use it in the hot water heater (extremely limited run times a few days in winter), and ozone water is for consumption. The pump and the ozone unit only function to keep a 20 gallon ABS drum filled. We get water 11 hours twice a week. This has to fill two "tinacas". A 40PSI booster pump pushes well water for domestic use and for further processing as needed. My dishes get washed with chlorinated well water and Axion Tri Cloro dish detergent. 55 gallon drums. Mold, mildew, a million and eleven different bacteria and virus in a tropical climate. Now you may understand why that Rolls battery bank and Kubota genset are so important. The RO system is a Village brand and puts out around 8 gallons an hour with 1,100 PSI pressure. it's for use on the sea.