Quality water is safe water.
But how can we tell if water is of good quality and is safe for consumption? You can't tell just by looking. Water quality, depending on its particular use, may be measured based on selected physical, chemical, and biological characteristics.
In the Philippines, quality water can be achieved by following the Philippine National Standards for Drinking Water (PNSDW). Since 1963, it has continually guided all drinking water service providers like the government, private developers and operators, water refilling stations, ice manufacturers, health and sanitation authorities, food establishments, and water testing laboratories in providing safe and quality water to protect the health of the consumers.