The water in the northwest side of Lake Padden near the Padden Gorge Trail is safe for people and their pets again.
Results from a water sample taken Monday showed that toxins from blue-green algae there no longer were in the lake, according to Tom Kunesh, environmental health supervisor for the Whatcom County Health Department.
Parks Department crews are removing signs that warn of the possible presence of toxic algae. The signs went up last week.
Previous testing found toxins, though not at a level considered unsafe by the state.
Still, people were warned to keep themselves and their pets out of the water as a precaution because toxin levels can change between water samplings.
Most blue-green algae blooms are not toxic. But the algae can release toxins into the water that, in high enough concentrations, can sicken humans and kill animals who drink the contaminated water.