The city Public Works department and King County Department of Natural Resources want to know if contamination is sewage or possibly from pets, raccoons, geese or beavers.
Officials are demonstrating the skills Monday of two dogs helping investigators a border collie named Molly and an Australian cattle dog named Crush.
In addition to using dogs, the agencies also are testing water samples at the King County Environmental Laboratory.
More Northwest Headlines
Yakima youngsters mix Legos, science education Activists rappel off Oregon bridge to stop Shell icebreaker Stanwood man pleads guilty to stealing from Swinomish tribe Death penalty dropped from Carnation killings trial Poll: Just 30 percent inclined to re-elect Gov. Inslee GOP lawmakers want Washington to look at Planned Parenthood Salvation Army sets up charging ports for Portland homeless Spokane criminal faces 30th felony charge
Our new comment system is not supported in IE 7. Please upgrade your browser here.