Water-Supply Information

ISO maintains the only national database of recognized hydrants and alternate sources of firefighting water. We develop and continually maintain this information municipality by municipality through our strong relationships with fire chiefs, water authorities, and other local government officials.

This sample map shows a typical community water-supply infrastructure of pumping stations, water treatment plants, water storage, and raw water sources. Click on the map to view a full-size PDF.

This map shows water-supply data ISO collects and maps for our Public Protection Classification (PPC™) program. In this sample municipality, you can view the areas with hydrants and related water distribution systems.