Avoid ochre in your water...

Ochre is a by-product made from a so-called iron bacterium. The bacterium is found almost everywhere on the planet and thus also in the tap water. The ochre bacterium survives by oxidising

Green hair can be caused by ocher

If you find that the water from your shower head colours your hair green, it is probably due to ochre in your tap water...

Ochre is a by-product