https://hydro.nationalmap.gov/arcgis/rest/services

Also run by USGS - The national map

• https://basemap.nationalmap.gov/arcgis/rest/services
• https://index.nationalmap.gov/arcgis/rest/services
• https://partnerships.nationalmap.gov/arcgis/rest/services
• https://hydro-wfs.nationalmap.gov/arcgis/rest/services
• https://hydrowfs.nationalmap.gov/arcgis/rest/services
• https://3dhp.nationalmap.gov/arcgis/rest/services
• https://carto.nationalmap.gov/arcgis/rest/services
• https://cartowfs.nationalmap.gov/arcgis/rest/services
• https://carto-wfs.nationalmap.gov/arcgis/rest/services
• https://certmapper.cr.usgs.gov/arcgis/rest/services
• https://certmapper.cr.usgs.gov/server/rest/services
• https://elevation.nationalmap.gov/arcgis/rest/services
• https://imagery.nationalmap.gov/arcgis/rest/services
• https://eerscmap.usgs.gov/arcgis/rest/services
• https://co2public.er.usgs.gov/arcgis/rest/services
• https://nimbus.cr.usgs.gov/arcgis/rest/services
• https://services.arcgisonline.com/arcgis/rest/services/USA_Topo_Maps/MapServer
• https://maps1.arcgisonline.com/arcgis/rest/services/NGA_US_National_Grid/Map
• https://edits.nationalmap.gov/arcgis/rest/services