FloWater can increase the pH of source water by up to 1.5 on the pH scale, though pH levels will vary based on factor like the quality of the source water, FloWater usage in your location or the lifecycle phase of the filter.
As a general rule, if your tap water has a base pH of 7.5, FloWater can increase the pH level as high as a 9. For comparison, EPA standards for tap water are recommended to be above 6.5 pH. Most bottled water brands fall between a 6 and an 8.5 on the pH scale.