Shared Enterprise Geodata and Services (SEGS) provides an EPA-curated collection of recommended geodata assets that are nationally relevant and support the Agency’s mission to protect human health and the environment. By connecting EPA users with curated datasets and promoting service reuse, SEGS aims to enhance information access, reduce data-storage costs, and improve the consistency and quality of data at the US EPA.

Developed by the U.S. EPA Office of Air and Radiation, this content item depicts changes in the annual average rate of water carried by rivers and streams across the country, based on the long-term rate of change from 1940 to 2018. This map is based on daily streamflow measurements, averaged over the entire year. Blue triangles represent increase in average annual stream flow volumes, and brown triangles represent a decrease. Streamflow data were collected by the U.S. Geological Survey (2020). For more information, please visit the U.S. EPA climate change indicators webpage. These data and their corresponding metadata records can be downloaded from the EPA Environmental Dataset Gateway (EDG).