This map shows the locations of EPA data sites across the United States, with each site represented by a small circle. The visualization displays state boundaries and interior borders using `d3.geoAlbersUsa` projection and `d3.geoPath` from the d3 v5 library, while React manages the component rendering. Data is loaded from a CSV file via `d3.csv`, and the map is rendered as SVG within a React application. The current implementation uses a fixed radius of 5 for all circles, though a square-root scale is prepared for size encoding.