According to the WHO, tap water is safe for consumption for 47% of the country.
There is a divide between rural and urban areas, tap water is safe to drink in 61% of urban areas, while it's only safe to drink in 34% of rural areas.
Drinking tap water should be avoided in the Philippines. It is rarely purified and may lead to stomach illness.
That said, it's generally OK to have a few ice cubes in your drink or brush your teeth with tap water. One notable exception is El Nido, which occasionally experiences more acute water-quality problems.
Bottled water isn't cheap โ up to P50 a litre โ so carry your own bottle around and refill it at the many water-refilling stations.
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 52.42 / 100 (100 being best).
Numbeo considers this score to be "Moderate"
1 adult could save about 577$ per year in Philippines 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.