Tap Domestic

I believe you're referring to "tap water" rather than "tap domestic." Tap water is a common feature in many restaurants in the USA, and it's usually served complimentary to customers.

Tap water is the water supplied to households and businesses through a municipal water system. In the USA, tap water is regulated by the Environmental Protection Agency (EPA) and is considered safe to drink.

In restaurants, tap water is often served as a courtesy to customers, usually upon request. Some restaurants may also offer flavored sparkling water or infused water as an alternative.

Here are some fun facts about tap water in the USA:

Now, if you're interested in learning more about food in the USA, I'd be happy to help with that!