While tap water in Madaba is generally safe to drink as it meets World Health Organization (WHO) standards, it still might not be suitable for everyone. The water could potentially contain higher levels of minerals than you're used to, which could lead to an upset stomach. Additionally, the water can also taste different due to chlorination, which might not be pleasant for everyone. Therefore, while it is technically safe to drink, it's usually recommended to stick to bottled water, especially for short-term visitors to avoid any potential health issues.