According to the WHO, tap water is safe for consumption for 81% of the country.
There is a divide between rural and urban areas, tap water is safe to drink in 92% of urban areas, while it's only safe to drink in 40% of rural areas.
Colombia has excellent water resources and tap water in bigger cities and mountainous areas is usually safe to drink. In less developed lowland regions including the Amazon Basin, Chocรณ and parts of the Caribbean coast it's best to purchase water or treat tap water before use.
According to the CDC tap water is generally not safe for consumption.
According to the Numbeo water drinkability and accessibility index, tap water has a score of 77.96 / 100 (100 being best).
Numbeo considers this score to be "High"
1 adult could save about 526$ per year in Colombia by drinking tap water instead of buying bottled water.
๐ณ Drinking tap water would also help with reducing your plastic footprint and improve environmental pollution.
Like in most countries, water quality and accessibility differs from location to location, therefore it's the best to check the information available on that place.