That's a nice euphemism for algae-beslimed open sewer. It's not like they could have been plotting to poison it, as that would be redundant. Still, the sheer speculative post 9-11 in me wonders whether they were playing hosts to some distant relations visiting from the old country who have decided to make some nefarious little terrorist moves and do a little house cleaning to cover their trails in the process.
"Thanks for the room, but we have some business to attend to, sorry Uncle Fez and Aunt 'Rina." *gurgle gurgle gurgle*.
I don't understand -- I used to swim in that reservoir as a kid, and it was a public park with a beach, floats, etc. I was there maybe 7-8 years ago and that was still the case. Am I thinking of the same place?