The fire broke out Thursday night at around 6:30 p.m. PT and was approximately 15 metres in diameter on the face of the landfill.
Saanich fire officials received help from three other fire departments, using five tanker trucks to shuttle water to the landfill.
"In the landfill, the fire can travel down and it can be difficult for us to get that water to penetrate down to the smoldering garbage that may be underneath the surface," said Brock Henson, emergency program officer with the Saanich Fire Department.
"It's a bit of a slow process and we often require the assistance of excavators to dig through that garbage that's on fire."
Residents in the Hartland area may continue to experience reduced water pressure in their homes as a result of the water being shuttled from fire hydrants.
Google Maps: Hartland landfill, Saanich, B.C.