City officials say no more rodent carcasses have been pulled from the Medicine Hat dump in a little over a week.
The total still sits at 78 — the same number as of April 22.
The city says less poison is being eaten and there are no signs of activity at the baiting stations.
Increased monitoring is to continue until there are several weeks of inactivity at the problem sites.
Alberta has always prided itself on being rat-free, but that status was called into question when the vermin were first discovered in the landfill in August 2012.
The pests were most recently spotted in the dump last month after someone reported finding one in a farmyard.
Medicine Hat officials say aggressive baiting is to continue in an effort to wipe out the rodents.
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