That depends on where you live.Is it safe to give water from the faucet to pigeons? Thank u all!!
If you have well water, and it isn't treated or softened you can use it, but it is always best to know exactly what is in it-you can take a sample and have it tested.
If you have city water, and it is fit for human consumption, you can use it on your birds. Again it is best to get a sample of it and have it tested.
You can give any water to birds IF it has been treated with reverse osmosis and pre & post filters, one that is made for human consumption.
I like give my birds bottled water, as well as water that has been purified.