... long time ago that if you do the garden hose route, to let it run a good long time.
An old touring friend of mine once told me of getting terribly sick from this...
Better to disconnect the hose and pull water from the hose bib(faucet). My dad got really sick from bacteria in a hose. The plasticizers leaching out of the hose, naturally, are bad news at any concentration..they continue to leach out as the water runs (retired polymer chemist).