Our tap water here in Davao City is from Dumoy aquifer Toril.
It's alleged to be one of the cleanest waters anywhere in the world. I have no idea whether that true or not. I can however say it's usually very clear and odorless and it's always very very cold. Beautiful for shower and tabo
I'm very sensitive to tap water anywhere so as usual I've never tried drinking Davao water and I never will.
Judging by it's slightly cloudy appearance from time to time I'm glad I didn't follow advice from everyone else living here. I don't trust any tap water here in the Philippines. Not for drinking, brushing teeth, washing salad, making ice or anything that goes in my body. I even keep my lips tightly shut when showering.

We drink purified dumoy water however which we buy in large bottles at P35 each. I think 5 gallons
No problems at all so far with that. I drink about a gallon a day on average.