> The dunks contain an unhealthy—for the mosquito larvae—dose of the bacterium, Bacillus thuringiensis, or BT. Don’t worry about your dog, Moonpie, or your cat, French Fry. They can drink straight from the bucket and be perfectly fine. Hey, it’s probably better than when they drink from your toilet, right?

Here I was under the impression that the water in the toilet is the same water as go into the taps, potable water, at least that's common here in Spain. Is it not the same in the US? Then both of them may have stagnant water or even "polluted" water in one way or another, but seems more or less the same.