pH Scale U.S. Geological Survey

Assessing the Lead Solubility Potential of Untreated Groundwater of the United States

What to Know about the pH of Drinking Water – Svalbarði Polar Iceberg Water

Machine-learning models to map pH and redox conditions in groundwater in a layered aquifer system, Northern Atlantic Coastal Plain, eastern USA - ScienceDirect

New Map Depicts Wyoming's Precambrian Basement

How to Balance Your Hot Tub's pH and Alkalinity - An Illustrated Guide

Peter J Haeussler, Ph.D.

3 Ways to Measure the pH of Water - wikiHow

The pH Scale

Effects of pH and Dissolved Silicate on Phosphate Mineral-Water Partitioning with Goethite

Brittany Hanrahan, Ph.D. - Physical Scientist - U.S. Geological Survey (USGS)

Negative pH and Extremely Acidic Mine Waters from Iron Mountain, California

Alkaline Water Definition

National Weather Service Advanced Hydrologic Prediction Service