Toilet flushing.
Nothing new here, so just a reminder of another water-saving measure to consider…
If it’s yellow, let it mellow.
Or pee outdoors.
On average, a standard toilet uses ~1.6 gallons a flush.
If a household flushes 10 pees a day, that’s 16 gallons, approx 60Litres, or the equivalent of 3 garafónes of water that could be saved, daily.

At 10 pee flushes a day, and if my arithmetic is correct, one could save ~480 gallons monthly, approx 2000Litres, or the equivalent of 100 garafones of water monthly.