Water is generally safe to drink from faucets throughout the island, except in the most far-flung rural regions. It is safest, however, to stick with bottled water, which is widely available. Itโs a good idea to avoid ice, particularly that sold at street stands as โbellywash,โ โsnoconesโ or โskyjuiceโ โ shaved-ice cones sweetened with fruit juice. Unless youโre certain that the local water is not contaminated, you shouldnโt drink it. In Jamaicaโs backwaters, clean your teeth with purified water rather than tap water.
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 56.88 / 100 (100 being best).
Numbeo considers this score to be "Moderate"
1 adult could save about 1029$ per year in Jamaica 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.