Water Data and Research

We've assembled a powerful database of American water and environmental health data. It contains 150+ Million data points encompassing the entire United States and Puerto Rico. This data enriches Tap Score with better contaminant targeting and richer information about your local water quality than any other water test.

We use data from our testing and other sources to further understand water quality across the country. We also make the data available to journalists and researchers who are trying to improve everyone's water quality by finding patterns and holding those who contaminate it accountable.

Your privacy is safe. We don't populate our maps with your location or other private information from your report. The dots you see on our maps reflect public testing locations. 

rich water quality and environmental health data

Our Latest Public Data and Mapping Experiments

US Coal Ash Disposal and Water Quality
US Groundwater Corrosive Potential and Metals in Water