Update: Yesterday's aesthetic water quality warning has been lifted.
The City of Grand Forks issued a public notice on Thursday morning, warning residents of potential tap water discolouration that is not harmful.
"The City’s water utility is pumping from its fifth well after it has been idle for some time. Some residents will notice discolouration or undesirable flavour in their tap water," the notice reads. "This is mainly iron and manganese in the lines. If you notice this, please run your tap until clear. It is not harmful but will affect the water’s taste and colour."
Communications officer Cavan Gates said the procedure was part of regular maintenance on the system.