People can make water cleaner and more sanitized is by to minimize the chemicals that we use so the water won’t become poisonous. Another way to make water clean and more sanitized is to recycle properly so we won’t drink plastic or whatever is recyclable so it won’t make us choke. The last way that people make cleaner water is to reduce water because that keep the water cleaner by not getting as much chemicals.
https://homeguides.sfgate.com/ten-ways-keep-water-clean-globally-79399.html