Umm... wow, someone breached the elaborate security and safety measures and contaminated the water supply! Wait, what's that? There's nothing preventing birds from pooping into the reservoir? How often have they had to drain it because a bird pooped in it?
earlier in the year i installed these cheap ass "gutter guard" clone deals from lowes on the house, keeps the leaves out of the gutters. unlike REAL gutter guards they don't come with end caps. i failed to see the problem with this until some birds took to nesting in the ends of the gutters under the gutter guards.
we've also got rain barrels that get filled from the gutters.
the wife realizes there's a bird nest in the gutter and freaks out because she's been watering herbs with the rain barrel water.
"it's got bird shit in it now!"......as opposed to the bird shit that washed off the roof into the gutters before? or the chemicals leached from the shingles and tarpaper that MAKE the roof? or the bird shit that is shat DIRECTLY onto the herbs to begin with?