Hillsboro Heights pond, Blue Algee

The city of Hillsboro has posted warning signs at the retaining pond in the Hills­boro Heights development after discovering a major blue-green algae bloom.  The signs warn of potential sickness in human and pets if they come in contact with the pond water.The most visible evidence of the contamination was at the overflow at the northeast corner of the pound, where the thick, blue-green sludge-like bloom was plainly visible and odorous.