Incident manager Matthew Dean previously said some of the issues were connected to the recent cold weather and a subsequent breakout of leaks and bursts across the area that left drinking water storage tanks running low.
Water regulator Ofwat said it was concerned about the supply problems amid calls for it to take action again SEW.
Several MPs have also been calling for SEW boss David Hinton, who earns a base salary of £400,000 and was paid a £115,000 bonus in 2025, to step down or to be removed from his role.
Five bottled stations were open on Tuesday across East Grinstead, Tunbridge Wells and Maidstone.
On Monday, Kent County Council leader Linden Kemkaran wrote on X that a “major incident” had been declared.
The Queen Victoria Hospital in East Grinstead also said some appointments may have to be carried out virtually.
SEW has been approached for further details.