How often do you change your pur or brita water filters?

On the box it says every two months but that seems too often to me. Can I wait longer then that?How often do you change your pur or brita water filters?No, you should not go beyond the two month period stated on the box. After that time, bacteria can grow and drinking the water may be harmful.How often do you change your pur or brita water filters?There is this indicator light on the filter so I change it whenever if flashes orange light.