Having been a lake steward on one of the small lakes for a number of years, I too also wonder about the lakes you mentioned among others (like the one I live on). I have found the personnel working/supporting the monitoring programs to be very professional, responsive and knowledgeable. They also give seminars periodically and enjoy(?) questions from their audiences.
King County provides info about their water monitoring of large lakes:
green2.kingcounty.gov
Also provides monitoring info about small lakes, like those you mentioned:
green2.kingcounty.gov
If people are interested they can contact them directly on the contact info of those web pages. Also if people are interested they welcome volunteers to help support the monitoring efforts.
Do they have the info or means to test for things like being discussed here? Don't know but it wouldn't surprise me in they were involved in the testing supporting the WDFW study. I do know they have improved the times and amount of testing recently. At least it is moving in the right direction...